Added expression matcher

Author: norberttech

composer.json

@@ -5,7 +5,8 @@
     "license": "MIT",    
     "require": {
         "php": ">=5.3.0",
-        "symfony/property-access": "~2.3"
+        "symfony/property-access": "~2.3",
+        "symfony/expression-language": "~2.4"
     },
     "require-dev": {
         "phpunit/phpunit": "3.7.*"

match.php

@@ -2,6 +2,7 @@
 
 use JsonMatcher\Matcher\ArrayMatcher;
 use JsonMatcher\Matcher\ChainMatcher;
+use JsonMatcher\Matcher\ExpressionMatcher;
 use JsonMatcher\Matcher\JsonMatcher;
 use JsonMatcher\Matcher\ScalarMatcher;
 use JsonMatcher\Matcher\TypeMatcher;
@@ -31,6 +32,7 @@
     function match($value, $pattern)
     {
         $scalarMatchers = new ChainMatcher(array(
+            new ExpressionMatcher(),
             new TypeMatcher(),
             new ScalarMatcher(),
             new WildcardMatcher()

src/JsonMatcher/Matcher/ExpressionMatcher.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace JsonMatcher\Matcher;
+
+use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
+
+class ExpressionMatcher implements PropertyMatcher
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function match($value, $pattern)
+    {
+        $language = new ExpressionLanguage();
+        preg_match("/^expr\((.*?)\)$/", $pattern, $matches);
+        return $language->evaluate($matches[1], array('value' => $value));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function canMatch($pattern)
+    {
+        return is_string($pattern) && 0 !== preg_match("/^expr\((.*?)\)$/", $pattern);
+    }
+}

tests/JsonMatcher/Matcher/ExpressionMatcherTest.php

@@ -0,0 +1,79 @@
+<?php
+namespace JsonMatcher\Tests\Matcher;
+
+use JsonMatcher\Matcher\ExpressionMatcher;
+
+class ExpressionMatcherTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider positiveCanMatchData
+     */
+    public function test_positive_can_matches($pattern)
+    {
+        $matcher = new ExpressionMatcher();
+        $this->assertTrue($matcher->canMatch($pattern));
+    }
+
+    /**
+     * @dataProvider negativeCanMatchData
+     */
+    public function test_negative_can_matches($pattern)
+    {
+        $matcher = new ExpressionMatcher();
+        $this->assertFalse($matcher->canMatch($pattern));
+    }
+
+    /**
+     * @dataProvider positiveMatchData
+     */
+    public function test_positive_match($value, $pattern)
+    {
+        $matcher = new ExpressionMatcher();
+        $this->assertTrue($matcher->match($value, $pattern));
+    }
+
+    /**
+     * @dataProvider negativeMatchData
+     */
+    public function test_negative_match($value, $pattern)
+    {
+        $matcher = new ExpressionMatcher();
+        $this->assertFalse($matcher->match($value, $pattern));
+    }
+
+    public static function positiveCanMatchData()
+    {
+        return array(
+            array("expr(1 > 2)"),
+            array("expr(value == 'foo')"),
+        );
+    }
+
+    public static function negativeCanMatchData()
+    {
+        return array(
+            array("@integer"),
+            array("expr("),
+            array("@string"),
+            array(new \stdClass),
+            array(array("foobar"))
+        );
+    }
+
+    public static function positiveMatchData()
+    {
+        return array(
+            array(4, "expr(value > 2)"),
+            array("foo", "expr(value == 'foo')"),
+            array(new \DateTime('2014-04-01'), "expr(value.format('Y-m-d') == '2014-04-01')")
+        );
+    }
+
+    public static function negativeMatchData()
+    {
+        return array(
+            array(4, "expr(value < 2)"),
+            array("foo", "expr(value != 'foo')"),
+        );
+    }
+}

tests/JsonMatcher/MatcherTest.php

@@ -3,6 +3,7 @@
 
 use JsonMatcher\Matcher\ArrayMatcher;
 use JsonMatcher\Matcher\ChainMatcher;
+use JsonMatcher\Matcher\ExpressionMatcher;
 use JsonMatcher\Matcher\JsonMatcher;
 use JsonMatcher\Matcher\ScalarMatcher;
 use JsonMatcher\Matcher\TypeMatcher;
@@ -18,6 +19,7 @@ class MatcherTest extends \PHPUnit_Framework_TestCase
     public function setUp()
     {
         $scalarMatchers = new ChainMatcher(array(
+            new ExpressionMatcher(),
             new TypeMatcher(),
             new ScalarMatcher(),
             new WildcardMatcher()
@@ -155,7 +157,7 @@ public function test_matcher_with_json()
                     "id": "@integer@",
                     "firstName": "Michał",
                     "lastName": "Dąbrowski",
-                    "enabled": "@boolean@",
+                    "enabled": "expr(value == false)",
                     "roles": "@array@"
                 }
             ],