diff --git a/unitTests/PHPExcel/AutoloaderTest.php b/unitTests/PHPExcel/AutoloaderTest.php
new file mode 100644
index 0000000..542be23
--- /dev/null
+++ b/unitTests/PHPExcel/AutoloaderTest.php
@@ -0,0 +1,56 @@
+<?php
+
+
+class AutoloaderTest extends PHPUnit_Framework_TestCase
+{
+
+    public function setUp()
+    {
+        if (!defined('PHPEXCEL_ROOT'))
+        {
+            define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
+        }
+        require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+    }
+
+    public function testAutoloaderNonPHPExcelClass()
+    {
+        $className = 'InvalidClass';
+
+        $result = PHPExcel_Autoloader::Load($className);
+        //    Must return a boolean...
+        $this->assertTrue(is_bool($result));
+        //    ... indicating failure
+        $this->assertFalse($result);
+    }
+
+    public function testAutoloaderInvalidPHPExcelClass()
+    {
+        $className = 'PHPExcel_Invalid_Class';
+
+        $result = PHPExcel_Autoloader::Load($className);
+        //    Must return a boolean...
+        $this->assertTrue(is_bool($result));
+        //    ... indicating failure
+        $this->assertFalse($result);
+    }
+
+    public function testAutoloadValidPHPExcelClass()
+    {
+        $className = 'PHPExcel_IOFactory';
+
+        $result = PHPExcel_Autoloader::Load($className);
+        //    Check that class has been loaded
+        $this->assertTrue(class_exists($className));
+    }
+
+    public function testAutoloadInstantiateSuccess()
+    {
+        $result = new PHPExcel_Calculation_Function(1,2,3);
+        //    Must return an object...
+        $this->assertTrue(is_object($result));
+        //    ... of the correct type
+        $this->assertTrue(is_a($result,'PHPExcel_Calculation_Function'));
+    }
+
+}
\ No newline at end of file
diff --git a/unitTests/PHPExcel/Calculation/LogicalTest.php b/unitTests/PHPExcel/Calculation/LogicalTest.php
new file mode 100644
index 0000000..52ea7ec
--- /dev/null
+++ b/unitTests/PHPExcel/Calculation/LogicalTest.php
@@ -0,0 +1,172 @@
+<?php
+
+
+require_once 'testDataFileIterator.php';
+
+class LogicalTest extends PHPUnit_Framework_TestCase
+{
+
+    public function setUp()
+    {
+        if (!defined('PHPEXCEL_ROOT'))
+        {
+            define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
+        }
+        require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+	}
+
+	public function testTRUE()
+	{
+		$result = PHPExcel_Calculation_Logical::TRUE();
+		$this->assertEquals(TRUE, $result);
+	}
+
+	public function testFALSE()
+	{
+		$result = PHPExcel_Calculation_Logical::FALSE();
+		$this->assertEquals(FALSE, $result);
+	}
+
+    /**
+     * @dataProvider providerAND
+     */
+	public function testAND()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Logical','LOGICAL_AND'),$args);
+		$this->assertEquals($expectedResult, $result);
+	}
+
+    public function providerAND()
+    {
+		return array(
+				array(	'#VALUE!'	),								//	No arguments
+				array(	NULL,	TRUE	),							//	NULL
+				array(	TRUE,	NULL,	TRUE	),					//	Boolean TRUE and NULL
+				array(	FALSE,	NULL,	FALSE	),					//	Boolean FALSE and NULL
+				array(	TRUE,	TRUE,	TRUE	),					//	Both TRUE Booleans
+				array(	TRUE,	FALSE,	FALSE	),					//	Mixed Booleans
+				array(	FALSE,	TRUE,	FALSE	),					//	Mixed Booleans
+				array(	FALSE,	FALSE,	FALSE	),					//	Both FALSE Booleans
+				array(	TRUE,	TRUE,	FALSE,	FALSE	),			//	Multiple Mixed Booleans
+				array(	TRUE,	TRUE,	TRUE,	TRUE	),			//	Multiple TRUE Booleans
+				array(	FALSE,	FALSE,	FALSE,	FALSE,	FALSE	),	//	Multiple FALSE Booleans
+				array(	-1,	-2,	TRUE	),
+				array(	0,	0,	FALSE	),
+				array(	0,	1,	FALSE	),
+				array(	1,	1,	TRUE	),
+				array(	'1',1,	'#VALUE!'	),
+				array(	'TRUE',1,	TRUE	),						//	'TRUE' String
+				array(	'FALSE',TRUE,	FALSE	),					//	'FALSE' String
+				array(	'ABCD',1,	'#VALUE!'	),					//	Non-numeric String
+				array(	-2,	1,	TRUE	),
+				array(	-2,	0,	FALSE	),
+			);
+
+//    	return new testDataFileIterator('rawTestData/Calculation/Logical/AND.data');
+	}
+
+    /**
+     * @dataProvider providerOR
+     */
+	public function testOR()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Logical','LOGICAL_OR'),$args);
+		$this->assertEquals($expectedResult, $result);
+	}
+
+    public function providerOR()
+    {
+		return array(
+				array(	'#VALUE!'	),								//	No arguments
+				array(	NULL,	FALSE	),							//	NULL
+				array(	TRUE,	NULL,	TRUE	),					//	Boolean TRUE and NULL
+				array(	FALSE,	NULL,	FALSE	),					//	Boolean FALSE and NULL
+				array(	TRUE,	TRUE,	TRUE	),					//	Both TRUE Booleans
+				array(	TRUE,	FALSE,	TRUE	),					//	Mixed Booleans
+				array(	FALSE,	TRUE,	TRUE	),					//	Mixed Booleans
+				array(	FALSE,	FALSE,	FALSE	),					//	Both FALSE Booleans
+				array(	TRUE,	TRUE,	FALSE,	TRUE	),			//	Multiple Mixed Booleans
+				array(	TRUE,	TRUE,	TRUE,	TRUE	),			//	Multiple TRUE Booleans
+				array(	FALSE,	FALSE,	FALSE,	FALSE,	FALSE	),	//	Multiple FALSE Booleans
+				array(	-1,	-2,	TRUE	),
+				array(	0,	0,	FALSE	),
+				array(	0,	1,	TRUE	),
+				array(	1,	1,	TRUE	),
+				array(	'TRUE',1,	TRUE	),						//	'TRUE' String
+				array(	'FALSE',TRUE,	TRUE	),					//	'FALSE' String
+				array(	'ABCD',1,	'#VALUE!'	),					//	Non-numeric String
+				array(	-2,	1,	TRUE	),
+				array(	-2,	0,	TRUE	),
+			);
+
+//    	return new testDataFileIterator('rawTestData/Calculation/Logical/OR.data');
+	}
+
+    /**
+     * @dataProvider providerNOT
+     */
+    public function testNOT()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Logical','NOT'),$args);
+		$this->assertEquals($expectedResult, $result);
+	}
+
+    public function providerNOT()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Logical/NOT.data');
+    }
+
+    /**
+     * @dataProvider providerIF
+     */
+    public function testIF()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Logical','STATEMENT_IF'),$args);
+		$this->assertEquals($expectedResult, $result);
+	}
+
+    public function providerIF()
+    {
+		return array(
+				array(	0	),
+				array(	TRUE,	0	),
+				array(	FALSE,	FALSE	),
+				array(	TRUE,	'ABC',	'ABC'	),
+				array(	FALSE,	'ABC',	FALSE	),
+				array(	TRUE,	'ABC',	'XYZ',	'ABC'	),
+				array(	FALSE,	'ABC',	'XYZ',	'XYZ'	),
+			);
+
+//    	return new testDataFileIterator('rawTestData/Calculation/Logical/IF.data');
+	}
+
+    /**
+     * @dataProvider providerIFERROR
+     */
+    public function testIFERROR()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Logical','IFERROR'),$args);
+		$this->assertEquals($expectedResult, $result);
+	}
+
+    public function providerIFERROR()
+    {
+		return array(
+				array(	TRUE,	'Not an Error',	'Not an Error'),
+				array(	'#VALUE!',	'Error',	'Error'	),
+			);
+
+//    	return new testDataFileIterator('rawTestData/Calculation/Logical/IFERROR.data');
+	}
+
+}
diff --git a/unitTests/bootstrap.php b/unitTests/bootstrap.php
new file mode 100644
index 0000000..61ae205
--- /dev/null
+++ b/unitTests/bootstrap.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * $Id: bootstrap.php 2892 2011-08-14 15:11:50Z markbaker@phpexcel.net $
+ *
+ * @copyright   Copyright (C) 2011 PHPExcel. All rights reserved.
+ * @package     PHPExcel
+ * @subpackage  PHPExcel Unit Tests
+ * @author      Mark Baker
+ */
+
+// PHP 5.3 Compat
+date_default_timezone_set('Europe/London');
+
+// Define path to application directory
+defined('APPLICATION_PATH')
+	|| define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../Classes'));
+
+// Define path to application tests directory
+defined('APPLICATION_TESTS_PATH')
+	|| define('APPLICATION_TESTS_PATH', realpath(dirname(__FILE__) ));
+
+// Define application environment
+defined('APPLICATION_ENV') || define('APPLICATION_ENV', 'ci');
+
+// Ensure library/ is on include_path
+set_include_path(implode(PATH_SEPARATOR, array(
+	realpath(APPLICATION_PATH . '/../Classes'),
+	'./',
+	get_include_path(),
+)));
+
+
+/**
+ * @todo Sort out xdebug in vagrant so that this works in all sandboxes
+ * For now, it is safer to test for it rather then remove it.
+ */
+echo "PHPExcel tests beginning\n";
+
+if(extension_loaded('xdebug')) {
+	echo "Xdebug extension loaded and running\n";
+	xdebug_enable();
+} else {
+	echo 'Xdebug not found, you should run the following at the command line: echo "zend_extension=/usr/lib64/php/modules/xdebug.so" > /etc/php.d/xdebug.ini' . "\n";
+}
diff --git a/unitTests/phpunit.xml b/unitTests/phpunit.xml
new file mode 100644
index 0000000..4186581
--- /dev/null
+++ b/unitTests/phpunit.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?> 
+<phpunit bootstrap="./bootstrap.php"
+    backupGlobals="true"
+    colors="true" 
+    convertErrorsToExceptions="true" 
+    convertNoticesToExceptions="true" 
+    convertWarningsToExceptions="true" 
+    processIsolation="false" 
+    syntaxCheck="true" 
+    verbose="true" 
+    strict="true"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false">
+    <php>
+        <ini name="memory_limit" value="2048M"/>
+    </php>
+    <testsuite name="PHPExcel Unit Test Suite">
+        <directory suffix="Test.php">./PHPExcel</directory>
+    </testsuite>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">../Classes</directory>
+            <exclude>
+                <directory>../Classes/PHPExcel/Shared/PDF</directory>
+                <directory>../Classes/PHPExcel/Shared/PCLZip</directory>
+                <directory>../Classes/PHPExcel/Shared/JAMA</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+    <logging>
+        <log type="coverage-html" target="./codeCoverage" charset="UTF-8"
+             yui="true" highlight="false"
+             lowUpperBound="35" highLowerBound="70"/>
+        <log type="coverage-clover" target="./codeCoverage/codeCoverage.xml"/>
+    </logging>
+</phpunit> 
diff --git a/unitTests/rawTestData/Calculation/Logical/NOT.data b/unitTests/rawTestData/Calculation/Logical/NOT.data
new file mode 100644
index 0000000..d65a28d
--- /dev/null
+++ b/unitTests/rawTestData/Calculation/Logical/NOT.data
@@ -0,0 +1,20 @@
+,TRUE
+NULL,TRUE
+-1,FALSE
+0,TRUE
+1,FALSE
+2,FALSE
+-1.5,FALSE
+1.5,FALSE
+"-1","#VALUE!"
+"0","#VALUE!"
+"1","#VALUE!"
+"2","#VALUE!"
+"-1.5","#VALUE!"
+"1.5","#VALUE!"
+"","#VALUE!"
+"ABC","#VALUE!"
+"FALSE",TRUE
+"TRUE",FALSE
+TRUE,FALSE
+FALSE,TRUE
\ No newline at end of file
diff --git a/unitTests/testDataFileIterator.php b/unitTests/testDataFileIterator.php
new file mode 100644
index 0000000..f183887
--- /dev/null
+++ b/unitTests/testDataFileIterator.php
@@ -0,0 +1,79 @@
+<?php
+
+class testDataFileIterator implements Iterator
+{
+
+    protected $file;
+    protected $key = 0;
+    protected $current;
+
+    public function __construct($file)
+    {
+        $this->file = fopen($file, 'r');
+    }
+
+    public function __destruct()
+    {
+        fclose($this->file);
+    }
+
+    public function rewind()
+    {
+        rewind($this->file);
+        $this->current = $this->_parseNextDataset();
+        $this->key = 0;
+    }
+
+    public function valid()
+    {
+        return !feof($this->file);
+    }
+
+    public function key()
+    {
+        return $this->key;
+    }
+
+    public function current()
+    {
+        return $this->current;
+    }
+
+    public function next()
+    {
+        $this->current = $this->_parseNextDataset();
+        $this->key++;
+    }
+
+    private function _parseNextDataset()
+    {
+        $dataSet = explode(',',trim(fgets($this->file)));
+        foreach($dataSet as &$dataValue) {
+            if (!is_numeric($dataValue)) {
+                if($dataValue == '') {
+                    $dataValue = NULL;
+                } elseif($dataValue == '""') {
+                    $dataValue = '';
+                } elseif(($dataValue[0] == '"') && ($dataValue[strlen($dataValue)-1] == '"')) {
+                    $dataValue = substr($dataValue,1,-1);
+                } else {
+                    switch (strtoupper($dataValue)) {
+                        case 'NULL' :  $dataValue = NULL; break;
+                        case 'TRUE' :  $dataValue = TRUE; break;
+                        case 'FALSE' : $dataValue = FALSE; break;
+                    }
+                }
+            } else {
+                if (is_float($dataValue)) {
+                    $dataValue = (float) $dataValue;
+                } else {
+                    $dataValue = (int) $dataValue;
+                }
+            }
+        }
+        unset($dataValue);
+
+        return $dataSet;
+    }
+
+}