untether HTTPClientBuilder from Engine

core/engine.go

@@ -137,7 +137,12 @@ func (e *Engine) Router() *gin.Engine {
 // BuildHTTPClient builds HTTP client with provided configuration
 func (e *Engine) BuildHTTPClient(replaceDefault ...bool) *Engine {
 	if e.Config.GetHTTPClientConfig() != nil {
-		if client, err := NewHTTPClientBuilder().FromEngine(e).Build(replaceDefault...); err != nil {
+		client, err := NewHTTPClientBuilder().
+			WithLogger(e.Logger).
+			SetLogging(e.Config.IsDebug()).
+			FromEngine(e).Build(replaceDefault...)
+
+		if err != nil {
 			panic(err)
 		} else {
 			e.httpClient = client

core/http_client_builder.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/op/go-logging"
 	"github.com/pkg/errors"
 )
 
@@ -45,7 +46,7 @@ type HTTPClientBuilder struct {
 	httpClient    *http.Client
 	httpTransport *http.Transport
 	dialer        *net.Dialer
-	engine        *Engine
+	logger        *logging.Logger
 	built         bool
 	logging       bool
 	timeout       time.Duration
@@ -68,6 +69,15 @@ func NewHTTPClientBuilder() *HTTPClientBuilder {
 	}
 }
 
+// WithLogger sets provided logger into HTTPClientBuilder
+func (b *HTTPClientBuilder) WithLogger(logger *logging.Logger) *HTTPClientBuilder {
+	if logger != nil {
+		b.logger = logger
+	}
+
+	return b
+}
+
 // SetTimeout sets timeout for http client
 func (b *HTTPClientBuilder) SetTimeout(timeout time.Duration) *HTTPClientBuilder {
 	timeout = timeout * time.Second
@@ -105,9 +115,9 @@ func (b *HTTPClientBuilder) SetSSLVerification(enabled bool) *HTTPClientBuilder
 	return b
 }
 
-// EnableLogging enables logging in mocks
-func (b *HTTPClientBuilder) EnableLogging() *HTTPClientBuilder {
-	b.logging = true
+// SetLogging enables or disables logging in mocks
+func (b *HTTPClientBuilder) SetLogging(flag bool) *HTTPClientBuilder {
+	b.logging = flag
 	return b
 }
 
@@ -133,8 +143,6 @@ func (b *HTTPClientBuilder) FromConfig(config HTTPClientConfigInterface) *HTTPCl
 
 // FromEngine fulfills mock configuration from ConfigInterface inside Engine
 func (b *HTTPClientBuilder) FromEngine(engine *Engine) *HTTPClientBuilder {
-	b.engine = engine
-	b.logging = engine.Config.IsDebug()
 	return b.FromConfig(engine.Config.GetHTTPClientConfig())
 }
 
@@ -212,8 +220,8 @@ func (b *HTTPClientBuilder) buildMocks() error {
 // logf prints logs via Engine or via fmt.Printf
 func (b *HTTPClientBuilder) logf(format string, args ...interface{}) {
 	if b.logging {
-		if b.engine != nil && b.engine.Logger != nil {
-			b.engine.Logger.Infof(format, args...)
+		if b.logger != nil {
+			b.logger.Infof(format, args...)
 		} else {
 			fmt.Printf(format, args...)
 		}

core/http_client_builder_test.go

@@ -5,7 +5,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/op/go-logging"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 )
 
@@ -25,9 +27,12 @@ func (t *HTTPClientBuilderTest) Test_SetTimeout() {
 	assert.Equal(t.T(), 90*time.Second, t.builder.httpClient.Timeout)
 }
 
-func (t *HTTPClientBuilderTest) Test_EnableLogging() {
-	t.builder.EnableLogging()
-	assert.Equal(t.T(), true, t.builder.logging)
+func (t *HTTPClientBuilderTest) Test_SetLogging() {
+	t.builder.SetLogging(true)
+	assert.True(t.T(), t.builder.logging)
+
+	t.builder.SetLogging(false)
+	assert.False(t.T(), t.builder.logging)
 }
 
 func (t *HTTPClientBuilderTest) Test_SetMockAddress() {
@@ -97,7 +102,7 @@ func (t *HTTPClientBuilderTest) Test_FromEngine() {
 	}
 
 	t.builder.FromEngine(engine)
-	assert.NotNil(t.T(), engine, t.builder.engine)
+	assert.Equal(t.T(), engine.Config.GetHTTPClientConfig().GetMockAddress(), t.builder.mockAddress)
 }
 
 func (t *HTTPClientBuilderTest) Test_buildDialer() {
@@ -114,6 +119,18 @@ func (t *HTTPClientBuilderTest) Test_buildMocks() {
 	assert.NoError(t.T(), t.builder.buildMocks())
 }
 
+func (t *HTTPClientBuilderTest) Test_WithLogger() {
+	logger := NewLogger("telegram", logging.ERROR, DefaultLogFormatter())
+	builder := NewHTTPClientBuilder()
+	require.Nil(t.T(), builder.logger)
+
+	builder.WithLogger(nil)
+	assert.Nil(t.T(), builder.logger)
+
+	builder.WithLogger(logger)
+	assert.NotNil(t.T(), builder.logger)
+}
+
 func (t *HTTPClientBuilderTest) Test_logf() {
 	defer func() {
 		assert.Nil(t.T(), recover())

core/logger.go

@@ -8,7 +8,7 @@ import (
 
 // NewLogger will create new logger with specified formatter.
 // Usage:
-//	    logger := NewLogger(config, DefaultLogFormatter())
+//	    logger := NewLogger("telegram", logging.ERROR, DefaultLogFormatter())
 func NewLogger(transportCode string, logLevel logging.Level, logFormat logging.Formatter) *logging.Logger {
 	logger := logging.MustGetLogger(transportCode)
 	logBackend := logging.NewLogBackend(os.Stdout, "", 0)