Server: additional tests + related fixes

src/Server/Helper.php

@@ -223,7 +223,7 @@ class Helper
     {
         $root = $config->getRootValue();
 
-        if (is_callable($root)) {
+        if ($root instanceof \Closure) {
             $root = $root($params, $doc, $operationType);
         }
 
@@ -241,7 +241,7 @@ class Helper
     {
         $context = $config->getContext();
 
-        if (is_callable($context)) {
+        if ($context instanceof \Closure) {
             $context = $context($params, $doc, $operationType);
         }
 
@@ -302,14 +302,43 @@ class Helper
      *
      * @param ServerRequestInterface $request
      * @return array|Helper
+     * @throws RequestError
      */
     public function parsePsrRequest(ServerRequestInterface $request)
     {
-        $contentType = $request->getHeader('content-type');
+        if ($request->getMethod() === 'GET') {
-        if (isset($contentType[0]) && $contentType[0] === 'application/graphql') {
+            $bodyParams = [];
-            $bodyParams = ['query' => $request->getBody()->getContents()];
         } else {
-            $bodyParams = $request->getParsedBody();
+            $contentType = $request->getHeader('content-type');
+
+            if (!isset($contentType[0])) {
+                throw new RequestError('Missing "Content-Type" header');
+            }
+
+            if (stripos('application/graphql', $contentType[0]) !== false) {
+                $bodyParams = ['query' => $request->getBody()->getContents()];
+            } else if (stripos('application/json', $contentType[0]) !== false) {
+                $bodyParams = $request->getParsedBody();
+
+                if (null === $bodyParams) {
+                    throw new InvariantViolation(
+                        "PSR request is expected to provide parsed body for \"application/json\" requests but got null"
+                    );
+                }
+
+                if (!is_array($bodyParams)) {
+                    throw new RequestError(
+                        "GraphQL Server expects JSON object or array, but got " .
+                        Utils::printSafeJson($bodyParams)
+                    );
+                }
+            } else {
+                $bodyParams = $request->getParsedBody();
+
+                if (!is_array($bodyParams)) {
+                    throw new RequestError("Unexpected content type: " . Utils::printSafeJson($contentType[0]));
+                }
+            }
         }
 
         return $this->parseRequestParams(
@@ -473,8 +502,8 @@ class Helper
      */
     private function resolveHttpStatus($result)
     {
-        if (is_array($result)) {
+        if (is_array($result) && isset($result[0])) {
-            Utils::each($tmp, function ($executionResult, $index) {
+            Utils::each($result, function ($executionResult, $index) {
                 if (!$executionResult instanceof ExecutionResult) {
                     throw new InvariantViolation(sprintf(
                         "Expecting every entry of batched query result to be instance of %s but entry at position %d is %s",

src/Server/ServerConfig.php

@@ -30,12 +30,12 @@ class ServerConfig
     private $schema;
 
     /**
-     * @var mixed|callable
+     * @var mixed|\Closure
      */
     private $context;
 
     /**
-     * @var mixed|callable
+     * @var mixed|\Closure
      */
     private $rootValue;
 
@@ -83,7 +83,7 @@ class ServerConfig
     }
 
     /**
-     * @param mixed|callable $context
+     * @param mixed|\Closure $context
      * @return $this
      */
     public function setContext($context)
@@ -93,7 +93,7 @@ class ServerConfig
     }
 
     /**
-     * @param mixed|callable $rootValue
+     * @param mixed|\Closure $rootValue
      * @return $this
      */
     public function setRootValue($rootValue)

src/Utils/AST.php

@@ -342,7 +342,7 @@ class AST
      */
     public static function getOperation(DocumentNode $document, $operationName = null)
     {
-        if (is_array($document->definitions)) {
+        if ($document->definitions) {
             foreach ($document->definitions as $def) {
                 if ($def instanceof OperationDefinitionNode) {
                     if (!$operationName || (isset($def->name->value) && $def->name->value === $operationName)) {

tests/Server/Psr7/PsrRequestStub.php

@@ -0,0 +1,606 @@
+<?php
+namespace GraphQL\Tests\Server\Psr7;
+
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Message\StreamInterface;
+use Psr\Http\Message\UriInterface;
+
+class PsrRequestStub implements ServerRequestInterface
+{
+    public $queryParams = [];
+
+    public $headers = [];
+
+    public $method;
+
+    /**
+     * @var PsrStreamStub
+     */
+    public $body;
+
+    /**
+     * @var array
+     */
+    public $parsedBody;
+
+    /**
+     * Retrieves the HTTP protocol version as a string.
+     *
+     * The string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
+     *
+     * @return string HTTP protocol version.
+     */
+    public function getProtocolVersion()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified HTTP protocol version.
+     *
+     * The version string MUST contain only the HTTP version number (e.g.,
+     * "1.1", "1.0").
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new protocol version.
+     *
+     * @param string $version HTTP protocol version
+     * @return static
+     */
+    public function withProtocolVersion($version)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves all message header values.
+     *
+     * The keys represent the header name as it will be sent over the wire, and
+     * each value is an array of strings associated with the header.
+     *
+     *     // Represent the headers as a string
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         echo $name . ": " . implode(", ", $values);
+     *     }
+     *
+     *     // Emit headers iteratively:
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         foreach ($values as $value) {
+     *             header(sprintf('%s: %s', $name, $value), false);
+     *         }
+     *     }
+     *
+     * While header names are not case-sensitive, getHeaders() will preserve the
+     * exact case in which headers were originally specified.
+     *
+     * @return string[][] Returns an associative array of the message's headers. Each
+     *     key MUST be a header name, and each value MUST be an array of strings
+     *     for that header.
+     */
+    public function getHeaders()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Checks if a header exists by the given case-insensitive name.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return bool Returns true if any header names match the given header
+     *     name using a case-insensitive string comparison. Returns false if
+     *     no matching header name is found in the message.
+     */
+    public function hasHeader($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves a message header value by the given case-insensitive name.
+     *
+     * This method returns an array of all the header values of the given
+     * case-insensitive header name.
+     *
+     * If the header does not appear in the message, this method MUST return an
+     * empty array.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string[] An array of string values as provided for the given
+     *    header. If the header does not appear in the message, this method MUST
+     *    return an empty array.
+     */
+    public function getHeader($name)
+    {
+        $name = strtolower($name);
+        return isset($this->headers[$name]) ? $this->headers[$name] : [];
+    }
+
+    /**
+     * Retrieves a comma-separated string of the values for a single header.
+     *
+     * This method returns all of the header values of the given
+     * case-insensitive header name as a string concatenated together using
+     * a comma.
+     *
+     * NOTE: Not all header values may be appropriately represented using
+     * comma concatenation. For such headers, use getHeader() instead
+     * and supply your own delimiter when concatenating.
+     *
+     * If the header does not appear in the message, this method MUST return
+     * an empty string.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string A string of values as provided for the given header
+     *    concatenated together using a comma. If the header does not appear in
+     *    the message, this method MUST return an empty string.
+     */
+    public function getHeaderLine($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the provided value replacing the specified header.
+     *
+     * While header names are case-insensitive, the casing of the header will
+     * be preserved by this function, and returned from getHeaders().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new and/or updated header and value.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withHeader($name, $value)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified header appended with the given value.
+     *
+     * Existing values for the specified header will be maintained. The new
+     * value(s) will be appended to the existing list. If the header did not
+     * exist previously, it will be added.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new header and/or value.
+     *
+     * @param string $name Case-insensitive header field name to add.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withAddedHeader($name, $value)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance without the specified header.
+     *
+     * Header resolution MUST be done without case-sensitivity.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that removes
+     * the named header.
+     *
+     * @param string $name Case-insensitive header field name to remove.
+     * @return static
+     */
+    public function withoutHeader($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Gets the body of the message.
+     *
+     * @return StreamInterface Returns the body as a stream.
+     */
+    public function getBody()
+    {
+        return $this->body;
+    }
+
+    /**
+     * Return an instance with the specified message body.
+     *
+     * The body MUST be a StreamInterface object.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return a new instance that has the
+     * new body stream.
+     *
+     * @param StreamInterface $body Body.
+     * @return static
+     * @throws \InvalidArgumentException When the body is not valid.
+     */
+    public function withBody(StreamInterface $body)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves the message's request target.
+     *
+     * Retrieves the message's request-target either as it will appear (for
+     * clients), as it appeared at request (for servers), or as it was
+     * specified for the instance (see withRequestTarget()).
+     *
+     * In most cases, this will be the origin-form of the composed URI,
+     * unless a value was provided to the concrete implementation (see
+     * withRequestTarget() below).
+     *
+     * If no URI is available, and no request-target has been specifically
+     * provided, this method MUST return the string "/".
+     *
+     * @return string
+     */
+    public function getRequestTarget()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specific request-target.
+     *
+     * If the request needs a non-origin-form request-target — e.g., for
+     * specifying an absolute-form, authority-form, or asterisk-form —
+     * this method may be used to create an instance with the specified
+     * request-target, verbatim.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request target.
+     *
+     * @link http://tools.ietf.org/html/rfc7230#section-5.3 (for the various
+     *     request-target forms allowed in request messages)
+     * @param mixed $requestTarget
+     * @return static
+     */
+    public function withRequestTarget($requestTarget)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves the HTTP method of the request.
+     *
+     * @return string Returns the request method.
+     */
+    public function getMethod()
+    {
+        return $this->method;
+    }
+
+    /**
+     * Return an instance with the provided HTTP method.
+     *
+     * While HTTP method names are typically all uppercase characters, HTTP
+     * method names are case-sensitive and thus implementations SHOULD NOT
+     * modify the given string.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request method.
+     *
+     * @param string $method Case-sensitive method.
+     * @return static
+     * @throws \InvalidArgumentException for invalid HTTP methods.
+     */
+    public function withMethod($method)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves the URI instance.
+     *
+     * This method MUST return a UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @return UriInterface Returns a UriInterface instance
+     *     representing the URI of the request.
+     */
+    public function getUri()
+    {
+        // TODO: Implement getUri() method.
+    }
+
+    /**
+     * Returns an instance with the provided URI.
+     *
+     * This method MUST update the Host header of the returned request by
+     * default if the URI contains a host component. If the URI does not
+     * contain a host component, any pre-existing Host header MUST be carried
+     * over to the returned request.
+     *
+     * You can opt-in to preserving the original state of the Host header by
+     * setting `$preserveHost` to `true`. When `$preserveHost` is set to
+     * `true`, this method interacts with the Host header in the following ways:
+     *
+     * - If the Host header is missing or empty, and the new URI contains
+     *   a host component, this method MUST update the Host header in the returned
+     *   request.
+     * - If the Host header is missing or empty, and the new URI does not contain a
+     *   host component, this method MUST NOT update the Host header in the returned
+     *   request.
+     * - If a Host header is present and non-empty, this method MUST NOT update
+     *   the Host header in the returned request.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @param UriInterface $uri New request URI to use.
+     * @param bool $preserveHost Preserve the original state of the Host header.
+     * @return static
+     */
+    public function withUri(UriInterface $uri, $preserveHost = false)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve server parameters.
+     *
+     * Retrieves data related to the incoming request environment,
+     * typically derived from PHP's $_SERVER superglobal. The data IS NOT
+     * REQUIRED to originate from $_SERVER.
+     *
+     * @return array
+     */
+    public function getServerParams()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve cookies.
+     *
+     * Retrieves cookies sent by the client to the server.
+     *
+     * The data MUST be compatible with the structure of the $_COOKIE
+     * superglobal.
+     *
+     * @return array
+     */
+    public function getCookieParams()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified cookies.
+     *
+     * The data IS NOT REQUIRED to come from the $_COOKIE superglobal, but MUST
+     * be compatible with the structure of $_COOKIE. Typically, this data will
+     * be injected at instantiation.
+     *
+     * This method MUST NOT update the related Cookie header of the request
+     * instance, nor related values in the server params.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated cookie values.
+     *
+     * @param array $cookies Array of key/value pairs representing cookies.
+     * @return static
+     */
+    public function withCookieParams(array $cookies)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve query string arguments.
+     *
+     * Retrieves the deserialized query string arguments, if any.
+     *
+     * Note: the query params might not be in sync with the URI or server
+     * params. If you need to ensure you are only getting the original
+     * values, you may need to parse the query string from `getUri()->getQuery()`
+     * or from the `QUERY_STRING` server param.
+     *
+     * @return array
+     */
+    public function getQueryParams()
+    {
+        return $this->queryParams;
+    }
+
+    /**
+     * Return an instance with the specified query string arguments.
+     *
+     * These values SHOULD remain immutable over the course of the incoming
+     * request. They MAY be injected during instantiation, such as from PHP's
+     * $_GET superglobal, or MAY be derived from some other value such as the
+     * URI. In cases where the arguments are parsed from the URI, the data
+     * MUST be compatible with what PHP's parse_str() would return for
+     * purposes of how duplicate query parameters are handled, and how nested
+     * sets are handled.
+     *
+     * Setting query string arguments MUST NOT change the URI stored by the
+     * request, nor the values in the server params.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated query string arguments.
+     *
+     * @param array $query Array of query string arguments, typically from
+     *     $_GET.
+     * @return static
+     */
+    public function withQueryParams(array $query)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve normalized file upload data.
+     *
+     * This method returns upload metadata in a normalized tree, with each leaf
+     * an instance of Psr\Http\Message\UploadedFileInterface.
+     *
+     * These values MAY be prepared from $_FILES or the message body during
+     * instantiation, or MAY be injected via withUploadedFiles().
+     *
+     * @return array An array tree of UploadedFileInterface instances; an empty
+     *     array MUST be returned if no data is present.
+     */
+    public function getUploadedFiles()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Create a new instance with the specified uploaded files.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated body parameters.
+     *
+     * @param array $uploadedFiles An array tree of UploadedFileInterface instances.
+     * @return static
+     * @throws \InvalidArgumentException if an invalid structure is provided.
+     */
+    public function withUploadedFiles(array $uploadedFiles)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve any parameters provided in the request body.
+     *
+     * If the request Content-Type is either application/x-www-form-urlencoded
+     * or multipart/form-data, and the request method is POST, this method MUST
+     * return the contents of $_POST.
+     *
+     * Otherwise, this method may return any results of deserializing
+     * the request body content; as parsing returns structured content, the
+     * potential types MUST be arrays or objects only. A null value indicates
+     * the absence of body content.
+     *
+     * @return null|array|object The deserialized body parameters, if any.
+     *     These will typically be an array or object.
+     */
+    public function getParsedBody()
+    {
+        return $this->parsedBody;
+    }
+
+    /**
+     * Return an instance with the specified body parameters.
+     *
+     * These MAY be injected during instantiation.
+     *
+     * If the request Content-Type is either application/x-www-form-urlencoded
+     * or multipart/form-data, and the request method is POST, use this method
+     * ONLY to inject the contents of $_POST.
+     *
+     * The data IS NOT REQUIRED to come from $_POST, but MUST be the results of
+     * deserializing the request body content. Deserialization/parsing returns
+     * structured data, and, as such, this method ONLY accepts arrays or objects,
+     * or a null value if nothing was available to parse.
+     *
+     * As an example, if content negotiation determines that the request data
+     * is a JSON payload, this method could be used to create a request
+     * instance with the deserialized parameters.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated body parameters.
+     *
+     * @param null|array|object $data The deserialized body data. This will
+     *     typically be in an array or object.
+     * @return static
+     * @throws \InvalidArgumentException if an unsupported argument type is
+     *     provided.
+     */
+    public function withParsedBody($data)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve attributes derived from the request.
+     *
+     * The request "attributes" may be used to allow injection of any
+     * parameters derived from the request: e.g., the results of path
+     * match operations; the results of decrypting cookies; the results of
+     * deserializing non-form-encoded message bodies; etc. Attributes
+     * will be application and request specific, and CAN be mutable.
+     *
+     * @return array Attributes derived from the request.
+     */
+    public function getAttributes()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieve a single derived request attribute.
+     *
+     * Retrieves a single derived request attribute as described in
+     * getAttributes(). If the attribute has not been previously set, returns
+     * the default value as provided.
+     *
+     * This method obviates the need for a hasAttribute() method, as it allows
+     * specifying a default value to return if the attribute is not found.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @param mixed $default Default value to return if the attribute does not exist.
+     * @return mixed
+     */
+    public function getAttribute($name, $default = null)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified derived request attribute.
+     *
+     * This method allows setting a single derived request attribute as
+     * described in getAttributes().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated attribute.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @param mixed $value The value of the attribute.
+     * @return static
+     */
+    public function withAttribute($name, $value)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance that removes the specified derived request attribute.
+     *
+     * This method allows removing a single derived request attribute as
+     * described in getAttributes().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that removes
+     * the attribute.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @return static
+     */
+    public function withoutAttribute($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+}

tests/Server/Psr7/PsrResponseStub.php

@@ -0,0 +1,279 @@
+<?php
+namespace GraphQL\Tests\Server\Psr7;
+
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+class PsrResponseStub implements ResponseInterface
+{
+    public $headers = [];
+
+    public $body;
+
+    public $statusCode;
+
+    /**
+     * Retrieves the HTTP protocol version as a string.
+     *
+     * The string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
+     *
+     * @return string HTTP protocol version.
+     */
+    public function getProtocolVersion()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified HTTP protocol version.
+     *
+     * The version string MUST contain only the HTTP version number (e.g.,
+     * "1.1", "1.0").
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new protocol version.
+     *
+     * @param string $version HTTP protocol version
+     * @return static
+     */
+    public function withProtocolVersion($version)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves all message header values.
+     *
+     * The keys represent the header name as it will be sent over the wire, and
+     * each value is an array of strings associated with the header.
+     *
+     *     // Represent the headers as a string
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         echo $name . ": " . implode(", ", $values);
+     *     }
+     *
+     *     // Emit headers iteratively:
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         foreach ($values as $value) {
+     *             header(sprintf('%s: %s', $name, $value), false);
+     *         }
+     *     }
+     *
+     * While header names are not case-sensitive, getHeaders() will preserve the
+     * exact case in which headers were originally specified.
+     *
+     * @return string[][] Returns an associative array of the message's headers. Each
+     *     key MUST be a header name, and each value MUST be an array of strings
+     *     for that header.
+     */
+    public function getHeaders()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Checks if a header exists by the given case-insensitive name.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return bool Returns true if any header names match the given header
+     *     name using a case-insensitive string comparison. Returns false if
+     *     no matching header name is found in the message.
+     */
+    public function hasHeader($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves a message header value by the given case-insensitive name.
+     *
+     * This method returns an array of all the header values of the given
+     * case-insensitive header name.
+     *
+     * If the header does not appear in the message, this method MUST return an
+     * empty array.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string[] An array of string values as provided for the given
+     *    header. If the header does not appear in the message, this method MUST
+     *    return an empty array.
+     */
+    public function getHeader($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Retrieves a comma-separated string of the values for a single header.
+     *
+     * This method returns all of the header values of the given
+     * case-insensitive header name as a string concatenated together using
+     * a comma.
+     *
+     * NOTE: Not all header values may be appropriately represented using
+     * comma concatenation. For such headers, use getHeader() instead
+     * and supply your own delimiter when concatenating.
+     *
+     * If the header does not appear in the message, this method MUST return
+     * an empty string.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string A string of values as provided for the given header
+     *    concatenated together using a comma. If the header does not appear in
+     *    the message, this method MUST return an empty string.
+     */
+    public function getHeaderLine($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the provided value replacing the specified header.
+     *
+     * While header names are case-insensitive, the casing of the header will
+     * be preserved by this function, and returned from getHeaders().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new and/or updated header and value.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withHeader($name, $value)
+    {
+        $tmp = clone $this;
+        $tmp->headers[$name][] = $value;
+        return $tmp;
+    }
+
+    /**
+     * Return an instance with the specified header appended with the given value.
+     *
+     * Existing values for the specified header will be maintained. The new
+     * value(s) will be appended to the existing list. If the header did not
+     * exist previously, it will be added.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new header and/or value.
+     *
+     * @param string $name Case-insensitive header field name to add.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withAddedHeader($name, $value)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance without the specified header.
+     *
+     * Header resolution MUST be done without case-sensitivity.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that removes
+     * the named header.
+     *
+     * @param string $name Case-insensitive header field name to remove.
+     * @return static
+     */
+    public function withoutHeader($name)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Gets the body of the message.
+     *
+     * @return StreamInterface Returns the body as a stream.
+     */
+    public function getBody()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified message body.
+     *
+     * The body MUST be a StreamInterface object.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return a new instance that has the
+     * new body stream.
+     *
+     * @param StreamInterface $body Body.
+     * @return static
+     * @throws \InvalidArgumentException When the body is not valid.
+     */
+    public function withBody(StreamInterface $body)
+    {
+        $tmp = clone $this;
+        $tmp->body = $body;
+        return $tmp;
+    }
+
+    /**
+     * Gets the response status code.
+     *
+     * The status code is a 3-digit integer result code of the server's attempt
+     * to understand and satisfy the request.
+     *
+     * @return int Status code.
+     */
+    public function getStatusCode()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Return an instance with the specified status code and, optionally, reason phrase.
+     *
+     * If no reason phrase is specified, implementations MAY choose to default
+     * to the RFC 7231 or IANA recommended reason phrase for the response's
+     * status code.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated status and reason phrase.
+     *
+     * @link http://tools.ietf.org/html/rfc7231#section-6
+     * @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+     * @param int $code The 3-digit integer result code to set.
+     * @param string $reasonPhrase The reason phrase to use with the
+     *     provided status code; if none is provided, implementations MAY
+     *     use the defaults as suggested in the HTTP specification.
+     * @return static
+     * @throws \InvalidArgumentException For invalid status code arguments.
+     */
+    public function withStatus($code, $reasonPhrase = '')
+    {
+        $tmp = clone $this;
+        $tmp->statusCode = $code;
+        return $tmp;
+    }
+
+    /**
+     * Gets the response reason phrase associated with the status code.
+     *
+     * Because a reason phrase is not a required element in a response
+     * status line, the reason phrase value MAY be null. Implementations MAY
+     * choose to return the default RFC 7231 recommended reason phrase (or those
+     * listed in the IANA HTTP Status Code Registry) for the response's
+     * status code.
+     *
+     * @link http://tools.ietf.org/html/rfc7231#section-6
+     * @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+     * @return string Reason phrase; must return an empty string if none present.
+     */
+    public function getReasonPhrase()
+    {
+        throw new \Exception("Not implemented");
+    }
+}

tests/Server/Psr7/PsrStreamStub.php

@@ -0,0 +1,200 @@
+<?php
+namespace GraphQL\Tests\Server\Psr7;
+
+use Psr\Http\Message\StreamInterface;
+
+class PsrStreamStub implements StreamInterface
+{
+    public $content;
+
+    /**
+     * Reads all data from the stream into a string, from the beginning to end.
+     *
+     * This method MUST attempt to seek to the beginning of the stream before
+     * reading data and read the stream until the end is reached.
+     *
+     * Warning: This could attempt to load a large amount of data into memory.
+     *
+     * This method MUST NOT raise an exception in order to conform with PHP's
+     * string casting operations.
+     *
+     * @see http://php.net/manual/en/language.oop5.magic.php#object.tostring
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->content;
+    }
+
+    /**
+     * Closes the stream and any underlying resources.
+     *
+     * @return void
+     */
+    public function close()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Separates any underlying resources from the stream.
+     *
+     * After the stream has been detached, the stream is in an unusable state.
+     *
+     * @return resource|null Underlying PHP stream, if any
+     */
+    public function detach()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Get the size of the stream if known.
+     *
+     * @return int|null Returns the size in bytes if known, or null if unknown.
+     */
+    public function getSize()
+    {
+        return strlen($this->content?:'');
+    }
+
+    /**
+     * Returns the current position of the file read/write pointer
+     *
+     * @return int Position of the file pointer
+     * @throws \RuntimeException on error.
+     */
+    public function tell()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Returns true if the stream is at the end of the stream.
+     *
+     * @return bool
+     */
+    public function eof()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Returns whether or not the stream is seekable.
+     *
+     * @return bool
+     */
+    public function isSeekable()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Seek to a position in the stream.
+     *
+     * @link http://www.php.net/manual/en/function.fseek.php
+     * @param int $offset Stream offset
+     * @param int $whence Specifies how the cursor position will be calculated
+     *     based on the seek offset. Valid values are identical to the built-in
+     *     PHP $whence values for `fseek()`.  SEEK_SET: Set position equal to
+     *     offset bytes SEEK_CUR: Set position to current location plus offset
+     *     SEEK_END: Set position to end-of-stream plus offset.
+     * @throws \RuntimeException on failure.
+     */
+    public function seek($offset, $whence = SEEK_SET)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Seek to the beginning of the stream.
+     *
+     * If the stream is not seekable, this method will raise an exception;
+     * otherwise, it will perform a seek(0).
+     *
+     * @see seek()
+     * @link http://www.php.net/manual/en/function.fseek.php
+     * @throws \RuntimeException on failure.
+     */
+    public function rewind()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Returns whether or not the stream is writable.
+     *
+     * @return bool
+     */
+    public function isWritable()
+    {
+        return true;
+    }
+
+    /**
+     * Write data to the stream.
+     *
+     * @param string $string The string that is to be written.
+     * @return int Returns the number of bytes written to the stream.
+     * @throws \RuntimeException on failure.
+     */
+    public function write($string)
+    {
+        $this->content = $string;
+        return strlen($string);
+    }
+
+    /**
+     * Returns whether or not the stream is readable.
+     *
+     * @return bool
+     */
+    public function isReadable()
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Read data from the stream.
+     *
+     * @param int $length Read up to $length bytes from the object and return
+     *     them. Fewer than $length bytes may be returned if underlying stream
+     *     call returns fewer bytes.
+     * @return string Returns the data read from the stream, or an empty string
+     *     if no bytes are available.
+     * @throws \RuntimeException if an error occurs.
+     */
+    public function read($length)
+    {
+        throw new \Exception("Not implemented");
+    }
+
+    /**
+     * Returns the remaining contents in a string
+     *
+     * @return string
+     * @throws \RuntimeException if unable to read or an error occurs while
+     *     reading.
+     */
+    public function getContents()
+    {
+        return $this->content;
+    }
+
+    /**
+     * Get stream metadata as an associative array or retrieve a specific key.
+     *
+     * The keys returned are identical to the keys returned from PHP's
+     * stream_get_meta_data() function.
+     *
+     * @link http://php.net/manual/en/function.stream-get-meta-data.php
+     * @param string $key Specific metadata to retrieve.
+     * @return array|mixed|null Returns an associative array if no key is
+     *     provided. Returns a specific key value if a key is provided and the
+     *     value is found, or null if the key is not found.
+     */
+    public function getMetadata($key = null)
+    {
+        throw new \Exception("Not implemented");
+    }
+}

tests/Server/PsrResponseTest.php

@@ -0,0 +1,24 @@
+<?php
+namespace GraphQL\Tests\Server;
+
+use GraphQL\Executor\ExecutionResult;
+use GraphQL\Server\Helper;
+use GraphQL\Tests\Server\Psr7\PsrStreamStub;
+use GraphQL\Tests\Server\Psr7\PsrResponseStub;
+
+class PsrResponseTest extends \PHPUnit_Framework_TestCase
+{
+    public function testConvertsResultToPsrResponse()
+    {
+        $result = new ExecutionResult(['key' => 'value']);
+        $stream = new PsrStreamStub();
+        $psrResponse = new PsrResponseStub();
+
+        $helper = new Helper();
+
+        /** @var PsrResponseStub $resp */
+        $resp = $helper->toPsrResponse($result, $psrResponse, $stream);
+        $this->assertSame(json_encode($result), $resp->body->content);
+        $this->assertSame(['Content-Type' => ['application/json']], $resp->headers);
+    }
+}

tests/Server/QueryExecutionTest.php

@@ -6,6 +6,7 @@ use GraphQL\Error\Error;
 use GraphQL\Error\InvariantViolation;
 use GraphQL\Error\UserError;
 use GraphQL\Executor\ExecutionResult;
+use GraphQL\Language\AST\DocumentNode;
 use GraphQL\Language\Parser;
 use GraphQL\Schema;
 use GraphQL\Server\Helper;
@@ -230,6 +231,27 @@ class QueryExecutionTest extends \PHPUnit_Framework_TestCase
         $this->assertTrue($called);
     }
 
+    public function testAllowsValidationRulesAsClosure()
+    {
+        $called = false;
+        $params = $doc = $operationType = null;
+
+        $this->config->setValidationRules(function($p, $d, $o) use (&$called, &$params, &$doc, &$operationType) {
+            $called = true;
+            $params = $p;
+            $doc = $d;
+            $operationType = $o;
+            return [];
+        });
+
+        $this->assertFalse($called);
+        $this->executeQuery('{f1}');
+        $this->assertTrue($called);
+        $this->assertInstanceOf(OperationParams::class, $params);
+        $this->assertInstanceOf(DocumentNode::class, $doc);
+        $this->assertEquals('query', $operationType);
+    }
+
     public function testAllowsDifferentValidationRulesDependingOnOperation()
     {
         $q1 = '{f1}';
@@ -587,6 +609,46 @@ class QueryExecutionTest extends \PHPUnit_Framework_TestCase
         );
     }
 
+    public function testAllowsContextAsClosure()
+    {
+        $called = false;
+        $params = $doc = $operationType = null;
+
+        $this->config->setContext(function($p, $d, $o) use (&$called, &$params, &$doc, &$operationType) {
+            $called = true;
+            $params = $p;
+            $doc = $d;
+            $operationType = $o;
+        });
+
+        $this->assertFalse($called);
+        $this->executeQuery('{f1}');
+        $this->assertTrue($called);
+        $this->assertInstanceOf(OperationParams::class, $params);
+        $this->assertInstanceOf(DocumentNode::class, $doc);
+        $this->assertEquals('query', $operationType);
+    }
+
+    public function testAllowsRootValueAsClosure()
+    {
+        $called = false;
+        $params = $doc = $operationType = null;
+
+        $this->config->setRootValue(function($p, $d, $o) use (&$called, &$params, &$doc, &$operationType) {
+            $called = true;
+            $params = $p;
+            $doc = $d;
+            $operationType = $o;
+        });
+
+        $this->assertFalse($called);
+        $this->executeQuery('{f1}');
+        $this->assertTrue($called);
+        $this->assertInstanceOf(OperationParams::class, $params);
+        $this->assertInstanceOf(DocumentNode::class, $doc);
+        $this->assertEquals('query', $operationType);
+    }
+
     private function executePersistedQuery($queryId, $variables = null)
     {
         $op = OperationParams::create(['queryId' => $queryId, 'variables' => $variables]);

tests/Server/RequestParsingTest.php

@@ -6,16 +6,23 @@ use GraphQL\Error\InvariantViolation;
 use GraphQL\Server\Helper;
 use GraphQL\Server\OperationParams;
 use GraphQL\Server\RequestError;
+use GraphQL\Tests\Server\Psr7\PsrRequestStub;
+use GraphQL\Tests\Server\Psr7\PsrStreamStub;
 
 class RequestParsingTest extends \PHPUnit_Framework_TestCase
 {
     public function testParsesGraphqlRequest()
     {
         $query = '{my query}';
-        $parsedBody = $this->parseRawRequest('application/graphql', $query);
+        $parsed = [
+            'raw' => $this->parseRawRequest('application/graphql', $query),
+            'psr' => $this->parsePsrRequest('application/graphql', $query)
+        ];
 
-        $this->assertValidOperationParams($parsedBody, $query);
+        foreach ($parsed as $source => $parsedBody) {
-        $this->assertFalse($parsedBody->isReadOnly());
+            $this->assertValidOperationParams($parsedBody, $query, null, null, null, $source);
+            $this->assertFalse($parsedBody->isReadOnly(), $source);
+        }
     }
 
     public function testParsesUrlencodedRequest()
@@ -29,10 +36,15 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
             'variables' => $variables,
             'operation' => $operation
         ];
+        $parsed = [
+            'raw' => $this->parseRawFormUrlencodedRequest($post),
+            'psr' => $this->parsePsrFormUrlEncodedRequest($post)
+        ];
 
-        $parsedBody = $this->parseFormUrlencodedRequest($post);
+        foreach ($parsed as $method => $parsedBody) {
-        $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation);
+            $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation, $method);
-        $this->assertFalse($parsedBody->isReadOnly());
+            $this->assertFalse($parsedBody->isReadOnly(), $method);
+        }
     }
 
     public function testParsesGetRequest()
@@ -46,10 +58,15 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
             'variables' => $variables,
             'operation' => $operation
         ];
+        $parsed = [
+            'raw' => $this->parseRawGetRequest($get),
+            'psr' => $this->parsePsrGetRequest($get)
+        ];
 
-        $parsedBody = $this->parseGetRequest($get);
+        foreach ($parsed as $method => $parsedBody) {
-        $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation);
+            $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation, $method);
-        $this->assertTrue($parsedBody->isReadonly());
+            $this->assertTrue($parsedBody->isReadonly(), $method);
+        }
     }
 
     public function testParsesJSONRequest()
@@ -63,9 +80,14 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
             'variables' => $variables,
             'operation' => $operation
         ];
-        $parsedBody = $this->parseRawRequest('application/json', json_encode($body));
+        $parsed = [
-        $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation);
+            'raw' => $this->parseRawRequest('application/json', json_encode($body)),
-        $this->assertFalse($parsedBody->isReadOnly());
+            'psr' => $this->parsePsrRequest('application/json', json_encode($body))
+        ];
+        foreach ($parsed as $method => $parsedBody) {
+            $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation, $method);
+            $this->assertFalse($parsedBody->isReadOnly(), $method);
+        }
     }
 
     public function testParsesVariablesAsJSON()
@@ -79,9 +101,14 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
             'variables' => json_encode($variables),
             'operation' => $operation
         ];
-        $parsedBody = $this->parseRawRequest('application/json', json_encode($body));
+        $parsed = [
-        $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation);
+            'raw' => $this->parseRawRequest('application/json', json_encode($body)),
-        $this->assertFalse($parsedBody->isReadOnly());
+            'psr' => $this->parsePsrRequest('application/json', json_encode($body))
+        ];
+        foreach ($parsed as $method => $parsedBody) {
+            $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation, $method);
+            $this->assertFalse($parsedBody->isReadOnly(), $method);
+        }
     }
 
     public function testIgnoresInvalidVariablesJson()
@@ -95,9 +122,14 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
             'variables' => $variables,
             'operation' => $operation
         ];
-        $parsedBody = $this->parseRawRequest('application/json', json_encode($body));
+        $parsed = [
-        $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation);
+            'raw' => $this->parseRawRequest('application/json', json_encode($body)),
-        $this->assertFalse($parsedBody->isReadOnly());
+            'psr' => $this->parsePsrRequest('application/json', json_encode($body)),
+        ];
+        foreach ($parsed as $method => $parsedBody) {
+            $this->assertValidOperationParams($parsedBody, $query, null, $variables, $operation, $method);
+            $this->assertFalse($parsedBody->isReadOnly(), $method);
+        }
     }
 
     public function testParsesBatchJSONRequest()
@@ -114,47 +146,115 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
                 'operation' => 'op2'
             ],
         ];
-
+        $parsed = [
-        $parsedBody = $this->parseRawRequest('application/json', json_encode($body));
+            'raw' => $this->parseRawRequest('application/json', json_encode($body)),
-        $this->assertInternalType('array', $parsedBody);
+            'psr' => $this->parsePsrRequest('application/json', json_encode($body))
-        $this->assertCount(2, $parsedBody);
+        ];
-
+        foreach ($parsed as $method => $parsedBody) {
-        $this->assertValidOperationParams($parsedBody[0], $body[0]['query'], null, $body[0]['variables'], $body[0]['operation']);
+            $this->assertInternalType('array', $parsedBody, $method);
-        $this->assertValidOperationParams($parsedBody[1], null, $body[1]['queryId'], $body[1]['variables'], $body[1]['operation']);
+            $this->assertCount(2, $parsedBody, $method);
+            $this->assertValidOperationParams($parsedBody[0], $body[0]['query'], null, $body[0]['variables'], $body[0]['operation'], $method);
+            $this->assertValidOperationParams($parsedBody[1], null, $body[1]['queryId'], $body[1]['variables'], $body[1]['operation'], $method);
+        }
     }
 
-    public function testFailsParsingInvalidJsonRequest()
+    public function testFailsParsingInvalidRawJsonRequest()
     {
         $body = 'not really{} a json';
 
-        $this->setExpectedException(RequestError::class, 'Could not parse JSON: Syntax error');
+        try {
-        $this->parseRawRequest('application/json', $body);
+            $this->parseRawRequest('application/json', $body);
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('Could not parse JSON: Syntax error', $e->getMessage());
+        }
+
+        try {
+            $this->parsePsrRequest('application/json', $body);
+            $this->fail('Expected exception not thrown');
+        } catch (InvariantViolation $e) {
+            // Expecting parsing exception to be thrown somewhere else:
+            $this->assertEquals(
+                'PSR request is expected to provide parsed body for "application/json" requests but got null',
+                $e->getMessage()
+            );
+        }
     }
 
+    // There is no equivalent for psr request, because it should throw
+
     public function testFailsParsingNonArrayOrObjectJsonRequest()
     {
         $body = '"str"';
 
-        $this->setExpectedException(RequestError::class, 'GraphQL Server expects JSON object or array, but got "str"');
+        try {
-        $this->parseRawRequest('application/json', $body);
+            $this->parseRawRequest('application/json', $body);
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('GraphQL Server expects JSON object or array, but got "str"', $e->getMessage());
+        }
+
+        try {
+            $this->parsePsrRequest('application/json', $body);
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('GraphQL Server expects JSON object or array, but got "str"', $e->getMessage());
+        }
+
     }
 
     public function testFailsParsingInvalidContentType()
     {
-        $this->setExpectedException(RequestError::class, 'Unexpected content type: "not-supported-content-type"');
+        $contentType = 'not-supported-content-type';
-        $this->parseRawRequest('not-supported-content-type', 'test');
+        $body = 'test';
+
+        try {
+            $this->parseRawRequest($contentType, $body);
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('Unexpected content type: "not-supported-content-type"', $e->getMessage());
+        }
+
+        try {
+            $this->parsePsrRequest($contentType, $body);
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('Unexpected content type: "not-supported-content-type"', $e->getMessage());
+        }
     }
 
     public function testFailsWithMissingContentType()
     {
-        $this->setExpectedException(RequestError::class, 'Missing "Content-Type" header');
+        try {
-        $this->parseRawRequest(null, 'test');
+            $this->parseRawRequest(null, 'test');
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('Missing "Content-Type" header', $e->getMessage());
+        }
+
+        try {
+            $this->parsePsrRequest(null, 'test');
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('Missing "Content-Type" header', $e->getMessage());
+        }
     }
 
     public function testFailsOnMethodsOtherThanPostOrGet()
     {
-        $this->setExpectedException(RequestError::class, 'HTTP Method "PUT" is not supported');
+        try {
-        $this->parseRawRequest(null, 'test', "PUT");
+            $this->parseRawRequest('application/json', json_encode([]), "PUT");
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('HTTP Method "PUT" is not supported', $e->getMessage());
+        }
+
+        try {
+            $this->parsePsrRequest('application/json', json_encode([]), "PUT");
+            $this->fail('Expected exception not thrown');
+        } catch (RequestError $e) {
+            $this->assertEquals('HTTP Method "PUT" is not supported', $e->getMessage());
+        }
     }
 
     /**
@@ -175,11 +275,41 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
         });
     }
 
+    /**
+     * @param string $contentType
+     * @param string $content
+     * @param $method
+     *
+     * @return OperationParams|OperationParams[]
+     */
+    private function parsePsrRequest($contentType, $content, $method = 'POST')
+    {
+        $psrRequestBody = new PsrStreamStub();
+        $psrRequestBody->content = $content;
+
+        $psrRequest = new PsrRequestStub();
+        $psrRequest->headers['content-type'] = [$contentType];
+        $psrRequest->method = $method;
+        $psrRequest->body = $psrRequestBody;
+
+        if ($contentType === 'application/json') {
+            $parsedBody = json_decode($content, true);
+            $parsedBody = $parsedBody === false ? null : $parsedBody;
+        } else {
+            $parsedBody = null;
+        }
+
+        $psrRequest->parsedBody = $parsedBody;
+
+        $helper = new Helper();
+        return $helper->parsePsrRequest($psrRequest);
+    }
+
     /**
      * @param array $postValue
      * @return OperationParams|OperationParams[]
      */
-    private function parseFormUrlencodedRequest($postValue)
+    private function parseRawFormUrlencodedRequest($postValue)
     {
         $_SERVER['CONTENT_TYPE'] = 'application/x-www-form-urlencoded';
         $_SERVER['REQUEST_METHOD'] = 'POST';
@@ -191,11 +321,26 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
         });
     }
 
+    /**
+     * @param $postValue
+     * @return array|Helper
+     */
+    private function parsePsrFormUrlEncodedRequest($postValue)
+    {
+        $psrRequest = new PsrRequestStub();
+        $psrRequest->headers['content-type'] = ['application/x-www-form-urlencoded'];
+        $psrRequest->method = 'POST';
+        $psrRequest->parsedBody = $postValue;
+
+        $helper = new Helper();
+        return $helper->parsePsrRequest($psrRequest);
+    }
+
     /**
      * @param $getValue
      * @return OperationParams
      */
-    private function parseGetRequest($getValue)
+    private function parseRawGetRequest($getValue)
     {
         $_SERVER['REQUEST_METHOD'] = 'GET';
         $_GET = $getValue;
@@ -206,6 +351,20 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
         });
     }
 
+    /**
+     * @param $getValue
+     * @return array|Helper
+     */
+    private function parsePsrGetRequest($getValue)
+    {
+        $psrRequest = new PsrRequestStub();
+        $psrRequest->method = 'GET';
+        $psrRequest->queryParams = $getValue;
+
+        $helper = new Helper();
+        return $helper->parsePsrRequest($psrRequest);
+    }
+
     /**
      * @param OperationParams $params
      * @param string $query
@@ -213,13 +372,13 @@ class RequestParsingTest extends \PHPUnit_Framework_TestCase
      * @param array $variables
      * @param string $operation
      */
-    private function assertValidOperationParams($params, $query, $queryId = null, $variables = null, $operation = null)
+    private function assertValidOperationParams($params, $query, $queryId = null, $variables = null, $operation = null, $message = '')
     {
-        $this->assertInstanceOf(OperationParams::class, $params);
+        $this->assertInstanceOf(OperationParams::class, $params, $message);
 
-        $this->assertSame($query, $params->query);
+        $this->assertSame($query, $params->query, $message);
-        $this->assertSame($queryId, $params->queryId);
+        $this->assertSame($queryId, $params->queryId, $message);
-        $this->assertSame($variables, $params->variables);
+        $this->assertSame($variables, $params->variables, $message);
-        $this->assertSame($operation, $params->operation);
+        $this->assertSame($operation, $params->operation, $message);
     }
 }