+ Added new configuration test case

+ Added constraints for configuration node asserting, module nodes assertions.

app/code/community/EcomDev/PHPUnit/Model/App.php

@@ -94,6 +94,13 @@ class EcomDev_PHPUnit_Model_App extends Mage_Core_Model_App
      */
     protected $_eventsEnabled = true;
 
+    /**
+     * List of module names stored by class name
+     *
+     * @var array
+     */
+    protected $_moduleNameByClassName = array();
+
     /**
      * This method replaces application, event and config objects
      * in Mage to perform unit tests in separate Magento steam
@@ -105,7 +112,7 @@ class EcomDev_PHPUnit_Model_App extends Mage_Core_Model_App
         self::$_oldApplication = EcomDev_Utils_Reflection::getRestrictedPropertyValue('Mage', '_app');
         self::$_oldConfig = EcomDev_Utils_Reflection::getRestrictedPropertyValue('Mage', '_config');
         self::$_oldEventCollection = EcomDev_Utils_Reflection::getRestrictedPropertyValue('Mage', '_events');
-        self::$_oldEventCollection = EcomDev_Utils_Reflection::getRestrictedPropertyValue('Mage', '_registry');
+        self::$_oldRegistry = EcomDev_Utils_Reflection::getRestrictedPropertyValue('Mage', '_registry');
 
 
         // Setting environment variables for unit tests
@@ -196,6 +203,54 @@ class EcomDev_PHPUnit_Model_App extends Mage_Core_Model_App
         EcomDev_Utils_Reflection::setRestrictedPropertyValue('Mage', '_registry', self::$_oldRegistry);
     }
 
+    /**
+     * Returns module name for a particular object
+     *
+     * @param string|object $className
+     * @throws RuntimeException if module name was not found for the passed class name
+     * @return string
+     */
+    public function getModuleNameByClassName($className)
+    {
+        if (is_object($className)) {
+            $className = get_class($className);
+        }
+
+        if (!isset($this->_moduleNameByClassName[$className])) {
+            // Try to find the module name by class name
+            $moduleName = false;
+            foreach ($this->getConfig()->getNode('modules')->children() as $module) {
+                if (strpos($className, $module->getName()) === 0) {
+                   $moduleName = $module->getName();
+                   break;
+                }
+            }
+
+            if (!$moduleName) {
+                throw new RuntimeException('Cannot to find the module name for class name: ' . $className);
+            }
+
+            $this->setModuleNameForClassName($className, $moduleName);
+        }
+
+        return $this->_moduleNameByClassName[$className];
+    }
+
+    /**
+     * Set associated module name for a class name,
+     * Usually used for making possible dependency injection in the test cases
+     *
+     *
+     * @param string $className
+     * @param string $moduleName
+     * @return EcomDev_PHPUnit_Model_App
+     */
+    public function setModuleNameForClassName($className, $moduleName)
+    {
+        $this->_moduleNameByClassName[$className] = $moduleName;
+        return $this;
+    }
+
     /**
      * Disables events fire
      *

app/code/community/EcomDev/PHPUnit/Model/Config.php

@@ -89,7 +89,7 @@ class EcomDev_PHPUnit_Model_Config extends Mage_Core_Model_Config
     public function getModelInstance($modelClass='', $constructArguments=array())
     {
         if (!isset($this->_replaceInstanceCreation['model'][$modelClass])) {
-            return parent::getModelInstance($modelClass='', $constructArguments=array());
+            return parent::getModelInstance($modelClass, $constructArguments);
         }
 
         return $this->_replaceInstanceCreation['model'][$modelClass];
@@ -104,7 +104,7 @@ class EcomDev_PHPUnit_Model_Config extends Mage_Core_Model_Config
     public function getResourceModelInstance($modelClass='', $constructArguments=array())
     {
         if (!isset($this->_replaceInstanceCreation['resource_model'][$modelClass])) {
-            return parent::getResourceModelInstance($modelClass='', $constructArguments=array());
+            return parent::getResourceModelInstance($modelClass, $constructArguments);
         }
 
         return $this->_replaceInstanceCreation['resource_model'][$modelClass];

app/code/community/EcomDev/PHPUnit/Test/Case.php

@@ -29,7 +29,7 @@ abstract class EcomDev_PHPUnit_Test_Case extends PHPUnit_Framework_TestCase
 {
 
     const XML_PATH_DEFAULT_FIXTURE_MODEL = 'phpunit/suite/fixture/model';
-    const XML_PATH_DEFAULT_EXPECTATION_MODEL = 'phpunit/suite/expectatio/model';
+    const XML_PATH_DEFAULT_EXPECTATION_MODEL = 'phpunit/suite/expectation/model';
 
 
     /**
@@ -55,6 +55,37 @@ abstract class EcomDev_PHPUnit_Test_Case extends PHPUnit_Framework_TestCase
      */
     protected $_originalStore = null;
 
+
+    /**
+     * Retrieves the module name for current test case
+     *
+     * @return string
+     * @throws RuntimeException if module name was not found for the passed class name
+     */
+    public function getModuleName()
+    {
+        return Mage::app()->getModuleNameByClassName($this);
+    }
+
+    /**
+     * Retrieves module name from call stack objects
+     *
+     * @return string
+     * @throws RuntimeException if assertion is called in not from EcomDev_PHPUnit_Test_Case
+     */
+    protected static function getModuleNameFromCallStack()
+    {
+        $backTrace = debug_backtrace(true);
+        foreach ($backTrace as $call) {
+            if (isset($call['object']) && $call['object'] instanceof EcomDev_PHPUnit_Test_Case) {
+                return $call['object']->getModuleName();
+            }
+        }
+
+        throw new RuntimeException('Unable to retrieve module name from call stack, because assertion is not called from EcomDev_PHPUnit_Test_Case based class method');
+    }
+
+
     /**
      * Retrieves annotation by its name from different sources (class, method)
      *
@@ -393,7 +424,7 @@ abstract class EcomDev_PHPUnit_Test_Case extends PHPUnit_Framework_TestCase
         }
 
         $mockBuilder->setMethods($methods);
-        $mockBuilder->setConstructorArgs($arguments);
+        $mockBuilder->setConstructorArgs($constructorArguments);
         $mockBuilder->setMockClassName($mockClassName);
 
         if ($isAbstract) {
@@ -592,4 +623,5 @@ abstract class EcomDev_PHPUnit_Test_Case extends PHPUnit_Framework_TestCase
         parent::tearDown();
     }
 
+
 }
\ No newline at end of file

app/code/community/EcomDev/PHPUnit/etc/config.xml

@@ -50,6 +50,7 @@
                 <models>Model</models>
                 <helpers>Helper</helpers>
                 <blocks>Block</blocks>
+                <config>Config</config>
             </groups>
             <!-- Test suite that will be used for creation of each of the tests -->
             <test_suite>EcomDev_PHPUnit_Test_Suite_Group</test_suite>

lib/EcomDev/PHPUnit/Constraint/Config.php

+<?php
+
+/**
+ * Constraint for testing the configuration values
+ *
+ *
+ */
+class EcomDev_PHPUnit_Constraint_Config extends PHPUnit_Framework_Constraint
+{
+    /**
+     * Configuration instance
+     *
+     * @var Varien_Simplexml_Config
+     */
+    protected $config = null;
+
+    /**
+     * Configuration constraint
+     *
+     * @var PHPUnit_Framework_Constraint
+     */
+    protected $constraint = null;
+
+    /**
+     * Creates configuration constraint for config object
+     *
+     * @param Varien_Simplexml_Config $config
+     */
+    public function __construct($constraint)
+    {
+        $this->config = $config;
+        if (!$constraint instanceof EcomDev_PHPUnit_Constraint_Config_Interface) {
+            throw PHPUnit_Util_InvalidArgumentHelper::factory(
+                1, 'EcomDev_PHPUnit_Constraint_Config_Interface'
+            );
+        }
+
+        $this->constraint = $constraint;
+    }
+
+
+    /**
+     *
+     * @param mixed   $other
+     * @param string  $description
+     * @param boolean $not
+     */
+    public function fail($other, $description, $not)
+    {
+        $nodeValue = $this->getNodeValue($other);
+
+        return $this->constraint->fail($nodeValue, $description, $not);
+    }
+
+    /**
+     * Retrives a node value from configuration by child constraint path
+     *
+     *
+     * @param Varien_Simplexml_Config $other
+     */
+    protected function getNodeValue($config)
+    {
+        $nodeValue = $config->getNode(
+            $this->constraint->getNodePath()
+        );
+
+        if ($nodeValue === false) {
+            throw new EcomDev_PHPUnit_Constraint_Exception(
+                sprintf('Invalid node path specified for evaluation %s', $this->constraint->getNodePath())
+            );
+        }
+
+        return $nodeValue;
+    }
+
+    /**
+     * Evalutes constraint that is passed in the parameter
+     *
+     * @param Varien_Simplexml_Config $config
+     * @see PHPUnit_Framework_Constraint::evaluate()
+     */
+    public function evaluate($config)
+    {
+        $nodeValue = $this->getNodeValue($config);
+
+        return $this->constraint->evaluate($nodeValue);
+    }
+
+    /**
+     * Returns a string representation of the constraint.
+     *
+     * @return string
+     */
+    public function toString()
+    {
+        return $this->constraint->toString();
+    }
+}

lib/EcomDev/PHPUnit/Constraint/Config/Abstract.php

+<?php
+
+/**
+ * Abstract class for constraints based on configuration
+ *
+ */
+abstract class EcomDev_PHPUnit_Constraint_Config_Abstract
+    extends PHPUnit_Framework_Constraint
+    implements EcomDev_PHPUnit_Constraint_Config_Interface
+{
+
+    /**
+     * List of valiadation rules for expected value
+     * It is an associative array with key as type and value
+     * as an array of rules.
+     *
+     * First item of the rule array is mandatory indicator,
+     * second is function name for checking the type,
+     * third one is the type that will be displayed in invalid argument expception
+     * each of them can be ommited or if it between other ones just by specifying null value
+     *
+     * @var array
+     */
+    protected $_expectedValueValidation = array();
+
+    /**
+     * List of types that will use diff for displaying fail result
+     *
+     * @var array
+     */
+    protected $_typesWithDiff = array();
+
+    /**
+     * Config node path defined in the constructor
+     *
+     * @var string
+     */
+    protected $_nodePath = null;
+
+    /**
+     * Comparisment type defined in the constructor
+     *
+     * @var string
+     */
+    protected $_type = null;
+
+    /**
+     * Expected value defined in the constructor
+     *
+     * @var mixed
+     */
+    protected $_expectedValue = null;
+
+    /**
+     * Custom actual value
+     *
+     * @var mixed
+     */
+    protected $_actualValue = null;
+
+    /**
+     * Flag for using of actual valu in failure description
+     *
+     * @var boolean
+     */
+    protected $_useActualValue = false;
+
+    /**
+     * Constraint constructor
+     *
+     * @param string $nodePath
+     * @param string $type
+     * @param mixed $expectedValue
+     */
+    public function __construct($nodePath, $type, $expectedValue = null)
+    {
+        if (empty($nodePath) || !is_string($nodePath)) {
+            throw PHPUnit_Util_InvalidArgumentHelper::factory(1, 'string', $type);
+        }
+
+        $reflection = EcomDev_Utils_Reflection::getRelflection(get_class($this));
+        $types = array();
+        foreach ($reflection->getConstants() as $name => $constant) {
+            if (strpos($name, 'TYPE_') === 0) {
+                $types[] = $constant;
+            }
+        }
+
+        if (empty($type) || !is_string($type) || !in_array($type, $types)) {
+            throw PHPUnit_Util_InvalidArgumentHelper::factory(2, 'string', $type);
+        }
+
+
+        if (isset($this->_expectedValueValidation[$type])) {
+            $expectedValueType = (isset($this->_expectedValueValidation[$type][2]) ?
+                                  isset($this->_expectedValueValidation[$type][2]) :
+                                  '');
+
+            // Mandatory check
+            if (isset($this->_expectedValueValidation[$type][0])
+                && $this->_expectedValueValidation[$type][0]
+                && $expectedValue === null) {
+                throw PHPUnit_Util_InvalidArgumentHelper::factory(3, $expectedValueType, $expectedValue);
+            }
+
+            // Type check
+            if (isset($this->_expectedValueValidation[$type][1])
+                && !$this->_expectedValueValidation[$type][1]($expectedValue)) {
+                throw PHPUnit_Util_InvalidArgumentHelper::factory(3, $expectedValueType, $expectedValue);
+            }
+
+        }
+
+
+        $this->_nodePath = $nodePath;
+        $this->_type = $type;
+        $this->_expectedValue = $expectedValue;
+    }
+
+    /**
+     * Set actual value that will be used in the fail message
+     *
+     * @param mixed $actual
+     * @return EcomDev_PHPUnit_Constraint_Config_Abstract
+     */
+    protected function setActualValue($actual)
+    {
+        $this->_useActualValue = true;
+        $this->_actualValue = $actual;
+        return $this;
+    }
+
+    /**
+     * Returns node path for checking
+     *
+     * (non-PHPdoc)
+     * @see EcomDev_PHPUnit_Constraint_Config_Interface::getNodePath()
+     */
+    public function getNodePath()
+    {
+        return $this->_nodePath;
+    }
+
+    /**
+     * Calls internal protected method by defined constraint type
+     * Also can be passed a single argument
+     *
+     * @param string $prefix
+     */
+    protected function callProtectedByType($prefix, $argument = null)
+    {
+        $camelizedType = uc_words($this->_type, '');
+        $methodName = $prefix . $camelizedType;
+        return $this->$methodName($argument);
+    }
+
+    /**
+     * Evaluates value by type.
+     * (non-PHPdoc)
+     * @see PHPUnit_Framework_Constraint::evaluate()
+     */
+    public function evaluate($other)
+    {
+        if ($other === false) {
+            // If node was not found, than evaluation fails
+            return false;
+        }
+
+        return $this->callProtectedByType('evaluate', $other);
+    }
+
+    /**
+     * Generates a failure exception based on exception type
+     *
+     * (non-PHPdoc)
+     * @see PHPUnit_Framework_Constraint::fail()
+     */
+    public function fail($other, $description, $not = FALSE)
+    {
+        $failureDescription = $this->failureDescription($other, $description, $not);
+
+        if (in_array($this->_type, $this->_typesWithDiff)) {
+            if ($this->_useActualValue) {
+                $other = $this->_actualValue;
+            } elseif ($other->hasChildren()) {
+                $other = $other->asNiceXml();
+            } else {
+                $other = (string) $other;
+            }
+
+            if ($this->_expectedValue instanceof Varien_Simplexml_Element) {
+                $expected = $this->_expectedValue->asNiceXml();
+            } else {
+                $expected = $this->_expectedValue;
+            }
+
+            throw new EcomDev_PHPUnit_Constraint_Exception(
+                $failureDescription,
+                PHPUnit_Util_Diff::diff($expected, $other),
+                $description
+            );
+        } else {
+            throw new EcomDev_PHPUnit_Constraint_Exception(
+                $failureDescription, $other->asNiceXml(), $description
+            );
+        }
+    }
+
+    /**
+     * Text reperesentation of constraint
+     * (non-PHPdoc)
+     * @see PHPUnit_Framework_SelfDescribing::toString()
+     */
+    public function toString()
+    {
+        return $this->callProtectedByType('text');
+    }
+}
\ No newline at end of file

lib/EcomDev/PHPUnit/Constraint/Config/Interface.php

+<?php
+
+/**
+ * Interface for configuration constraints
+ *
+ */
+interface EcomDev_PHPUnit_Constraint_Config_Interface
+{
+    public function getNodePath();
+}
\ No newline at end of file

lib/EcomDev/PHPUnit/Constraint/Config/Module.php

+<?php
+
+class EcomDev_PHPUnit_Constraint_Config_Module extends EcomDev_PHPUnit_Constraint_Config_Abstract
+{
+    const XML_PATH_MODULE_NODE = 'modules/%s';
+
+    const TYPE_IS_ACTIVE = 'is_active';
+    const TYPE_CODE_POOL = 'code_pool';
+    const TYPE_DEPENDS = 'depends';
+    const TYPE_EQUALS_VERSION = 'version';
+    const TYPE_LESS_THAN_VERSION = 'version_less_than';
+    const TYPE_GREATER_THAN_VERSION = 'version_greater_than';
+
+    /**
+     * Name of the module for constraint
+     *
+     * @var string
+     */
+    protected $_moduleName = null;
+
+    /**
+     * Contraint for evaluation of config node
+     *
+     * @param string $nodePath
+     * @param string $type
+     * @param mixed $expectedValue
+     */
+    public function __construct($moduleName, $type, $expectedValue)
+    {
+        $this->_expectedValueValidation += array(
+            self::TYPE_CODE_POOL => array(true, 'is_string', 'string'),
+            self::TYPE_DEPENDS => array(true, 'is_string', 'string'),
+            self::TYPE_EQUALS_VERSION => array(true, 'is_string', 'string'),
+            self::TYPE_LESS_THAN_VERSION => array(true, 'is_string', 'string'),
+            self::TYPE_GREATER_THAN_VERSION => array(true, 'is_string', 'string'),
+        );
+
+        $this->_typesWithDiff[] = self::TYPE_CODE_POOL;
+        $this->_typesWithDiff[] = self::TYPE_EQUALS_VERSION;
+        $this->_typesWithDiff[] = self::TYPE_LESS_THAN_VERSION;
+        $this->_typesWithDiff[] = self::TYPE_GREATER_THAN_VERSION;
+
+        parent::__construct(
+            sprintf(self::XML_PATH_MODULE_NODE, $moduleName),
+            $type,
+            $expectedValue
+        );
+
+        $this->_moduleName = $moduleName;
+    }
+
+    /**
+     * Evaluates module is active
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateIsActive($other)
+    {
+        return $other->is('active');
+    }
+
+    /**
+     * Text representation of module is active constraint
+     *
+     * @return string
+     */
+    protected function textIsActive()
+    {
+        return 'is active';
+    }
+
+    /**
+     * Evaluates module code pool
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateCodePool($other)
+    {
+        $this->setActualValue((string)$other->codePool);
+
+        return  $this->_actualValue === $this->_expectedValue;
+    }
+
+    /**
+     * Text representation of module is active constraint
+     *
+     * @return string
+     */
+    protected function textCodePool()
+    {
+        return sprintf('is placed in %s code pool', $this->_expectedValue);
+    }
+
+    /**
+     * Evaluates module is dependent on expected one
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateDepends($other)
+    {
+        if (!isset($other->depends) || !$other->depends->hasChildren()) {
+            return false;
+        }
+
+        return isset($other->depends->{$this->_expectedValue});
+    }
+
+    /**
+     * Text representation of module dependance
+     *
+     * @return string
+     */
+    protected function textDepends()
+    {
+        return sprintf('is dependent on %s module', $this->_expectedValue);
+    }
+
+    /**
+     * Evaluates module version is equal to expected
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateVersion($other)
+    {
+        return $this->compareVersion($other, '=');
+    }
+
+    /**
+     * Text representation of module version check
+     *
+     * @return string
+     */
+    protected function textVersion()
+    {
+        return sprintf('version is equal to %s', $this->_expectedValue);
+    }
+
+    /**
+     * Evaluates module version is less than expected
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateVersionLessThan($other)
+    {
+        return $this->compareVersion($other, '<');
+    }
+
+    /**
+     * Text representation of module version check
+     *
+     * @return string
+     */
+    protected function textVersionLessThan()
+    {
+        return sprintf('version is less than %s', $this->_expectedValue);
+    }
+
+    /**
+     * Evaluates module version is greater than expected
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateVersionGreaterThan($other)
+    {
+        return $this->compareVersion($other, '>');
+    }
+
+    /**
+     * Text representation of module version check
+     *
+     * @return string
+     */
+    protected function textVersionGreaterThan()
+    {
+        return sprintf('version is greater than %s', $this->_expectedValue);
+    }
+
+    /**
+     * Internal comparisment of the module version
+     *
+     * @param Varien_Simplexml_Element $other
+     * @param string $operator
+     */
+    protected function compareVersion($other, $operator)
+    {
+        $this->setActualValue((string)$other->version);
+        return version_compare($this->_actualValue, $this->_expectedValue, $operator);
+    }
+
+    /**
+     * Custom failure description for showing config related errors
+     * (non-PHPdoc)
+     * @see PHPUnit_Framework_Constraint::customFailureDescription()
+     */
+    protected function customFailureDescription($other, $description, $not)
+    {
+        return sprintf(
+          'Failed asserting that %s module %s.', $this->_moduleName, $this->toString()
+        );
+    }
+}

lib/EcomDev/PHPUnit/Constraint/Config/Node.php

+<?php
+
+class EcomDev_PHPUnit_Constraint_Config_Node
+    extends EcomDev_PHPUnit_Constraint_Config_Abstract
+{
+    const TYPE_EQUALS_STRING = 'equals_string';
+    const TYPE_EQUALS_BOOLEAN = 'equals_boolean';
+    const TYPE_EQUALS_XML = 'equals_xml';
+    const TYPE_EQUALS_NUMBER = 'equals_decimal';
+    const TYPE_LESS_THAN = 'less_than';
+    const TYPE_GREATER_THAN = 'greater_than';
+    const TYPE_CONTAIN_VALUE  = 'contain_values';
+    const TYPE_HAS_CHILD  = 'has_child';
+    const TYPE_HAS_CHILDREN = 'has_children';
+
+    /**
+     * Contraint for evaluation of config node
+     *
+     * @param string $moduleName
+     * @param string $type
+     * @param mixed $expectedValue
+     */
+    public function __construct($nodePath, $type, $expectedValue = null)
+    {
+        $this->_expectedValueValidation += array(
+            self::TYPE_EQUALS_STRING => array(true, 'is_string', 'string'),
+            self::TYPE_EQUALS_NUMBER => array(true, 'is_numeric', 'numeric'),
+            self::TYPE_LESS_THAN => array(true, 'is_numeric', 'numeric'),
+            self::TYPE_GREATER_THAN => array(true, 'is_numeric', 'numeric'),
+            self::TYPE_CONTAIN_VALUE => array(true, 'is_scalar', 'scalar'),
+            self::TYPE_HAS_CHILD => array(true, 'is_string', 'string')
+        );
+
+        $this->_typesWithDiff[] = self::TYPE_EQUALS_STRING;
+        $this->_typesWithDiff[] = self::TYPE_EQUALS_BOOLEAN;
+        $this->_typesWithDiff[] = self::TYPE_EQUALS_XML;
+        $this->_typesWithDiff[] = self::TYPE_EQUALS_NUMBER;
+        $this->_typesWithDiff[] = self::TYPE_LESS_THAN;
+        $this->_typesWithDiff[] = self::TYPE_GREATER_THAN;
+
+        parent::__construct($nodePath, $type, $expectedValue);
+    }
+
+    /**
+     * Check that node value is equal to string
+     *
+     * @param Varien_Simplexml_Element $other
+     */
+    protected function evaluateEqualsString($other)
+    {
+        return (string)$other === $this->_expectedValue;
+    }
+
+    /**
+     * Text representation of the assertion
+     *
+     * @return string
+     */
+    protected function textEqualsString()
+    {
+        return 'is equal to expected string';
+    }
+
+    /**
+     * Check that node value is equal to number
+     *
+     * @param Varien_Simplexml_Element $other
+     */
+    protected function evaluateEqualsNumber($other)
+    {
+        return (float)$other == $this->_expectedValue;
+    }
+
+    /**
+     * Text representation of the assertion
+     *
+     * @return string
+     */
+    protected function textEqualsNumber()
+    {
+        return 'is equal to expected number';
+    }
+
+    /**
+     * Check that node value is a string with such properties
+     *
+     * @param Varien_Simplexml_Element $other
+     */
+    protected function evaluateLessThan($other)
+    {
+        return (float)$other > (float)$this->_expectedValue;
+    }
+
+    /**
+     * Text representation of the assertion
+     *
+     * @return string
+     */
+    protected function textLessThan()
+    {
+        return sprintf('is less than %s', (float)$this->_expectedValue);
+    }
+
+    /**
+     * Check that node value is a string with such properties
+     *
+     * @param Varien_Simplexml_Element $other
+     */
+    protected function evaluateGreaterThan($other)
+    {
+        return (float)$other > (float)$this->_expectedValue;
+    }
+
+    /**
+     * Text representation of the assertion
+     *
+     * @return string
+     */
+    protected function textGreaterThan()
+    {
+        return sprintf('is greater than %s', (float)$this->_expectedValue);
+    }
+
+
+    /**
+     * Checks that string is not false value of a config flag
+     *
+     * @param Varien_Simplexml_Element $other
+     */
+    protected function evaluateEqualsBoolean($other)
+    {
+        $other = (string) $other;
+        return !empty($other) && $other !== 'false';
+    }
+
+    /**
+     * Returns text reperesentation of flag checking
+     *
+     * @return string
+     */
+    protected function textEqualsBoolean()
+    {
+        return 'is equals to boolean flag true';
+    }
+
+    /**
+     * Checks expected xml value with current configuration
+     *
+     * @param Varien_Simplexml_Element $other
+     * @throws RuntimeException if expected value is a valid xml object
+     */
+    protected function evaluateEqualsXml($other)
+    {
+        // Normalize expected XML for matching appropriate xml structure without
+        // whitespaces, etc
+        if (!$this->_expectedValue instanceof Varien_Simplexml_Element) {
+            try {
+               if ($other instanceof SimpleXMLElement) {
+                   $other = $other->asXML();
+               }
+               $expectedXml = new Varien_Simplexml_Element($this->_expectedValue);
+            } catch (Exception $e) {
+                throw new RuntimeException(sprintf(
+                    'Expected value is not an xml string for node %s, passed expected value: %s, parsing error: %s',
+                    $this->_nodePath,
+                    PHPUnit_Util_Type::toString($this->_expectedValue),
+                    $e->getMessage()
+                ));
+            }
+
+            $this->_expectedValue = $expectedXml;
+        }
+
+        return $this->_expectedValue->asNiceXml() == $other->asNiceXml();
+    }
+
+
+    /**
+     * Returns text representatation of xml comparisment
+     *
+     * @return string
+     */
+    protected function textEqualsXml()
+    {
+        return 'is the same as expected XML value';
+    }
+
+    /**
+     * Checks existance of a child with the expected value as the name
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateHasChild($other)
+    {
+        if (!$other->hasChildren()) {
+            return false;
+        }
+
+        if (!isset($other->{$this->_expectedValue})) {
+           return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Returns text represetnation of contain child assert
+     *
+     * @return string
+     */
+    protected function textHasChild()
+    {
+        return sprintf('has "%s" child node', $this->_expectedValue);
+    }
+
+    /**
+     * Checks that configuration node has children
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateHasChildren($other)
+    {
+        return $other->hasChildren();
+    }
+
+    /**
+     * Returns text representation of has children assert
+     *
+     * @return string
+     */
+    protected function textHasChildren()
+    {
+        return 'has children';
+    }
+
+    /**
+     * Checks multiple values nodes.
+     * Values are comma separated string
+     *
+     * @param Varien_Simplexml_Element $other
+     * @return boolean
+     */
+    protected function evaluateContainValue($other)
+    {
+        if ($other->hasChildren()) {
+            throw new RuntimeException(sprintf(
+                'Config node "%s" is not a string of comma separated values, passed expected value: %s',
+                $this->_nodePath,
+                PHPUnit_Util_Type::toString($this->_expectedValue)
+            ));
+        }
+
+        $values = explode(',', (string)$other);
+
+        if (!in_array($this->_expectedValue, $values)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Returns text representation of contain value assert
+     *
+     * @return string
+     */
+    protected function textContainValue()
+    {
+        return sprintf('contains "%s" in comma separated value list',
+                       PHPUnit_Util_Type::toString($this->_expectedValue));
+    }
+
+    /**
+     * Custom failure description for showing config related errors
+     * (non-PHPdoc)
+     * @see PHPUnit_Framework_Constraint::customFailureDescription()
+     */
+    protected function customFailureDescription($other, $description, $not)
+    {
+        return sprintf(
+          'Failed asserting that configuration node "%s" %s.', $this->_nodePath, $this->toString()
+        );
+    }
+}

lib/EcomDev/PHPUnit/Constraint/Exception.php

+<?php
+/**
+ * PHP Unit test suite for Magento
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://opensource.org/licenses/osl-3.0.php
+ *
+ * @category   EcomDev
+ * @package    EcomDev_PHPUnit
+ * @copyright  Copyright (c) 2011 Ecommerce Developers (http://www.ecomdev.org)
+ * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+ * @author     Ivan Chepurnyi <ivan.chepurnyi@ecomdev.org>
+ */
+
+/**
+ * Exception for failed constraints execution
+ *
+ *
+ */
+class EcomDev_PHPUnit_Constraint_Exception extends PHPUnit_Framework_ExpectationFailedException
+{
+    protected $diff = null;
+
+    public function __construct($description, $diff = '', $message = '')
+    {
+        $this->diff = $diff;
+        parent::__construct($description, null, $message);
+    }
+
+    public function toString()
+    {
+        $result = parent::toString();
+
+        if (!empty($this->diff)) {
+            $result .= "\n" . $this->diff;
+        }
+
+        return $result;
+    }
+}