Introduce type matcher

src/JsonMatcher/Matcher/TypeMatcher.php

@@ -15,7 +15,7 @@ public function match($value, $pattern)
 
     public function canMatch($pattern)
     {
-        return is_scalar($pattern);
+        return 0 !== preg_match("/^@(string|integer|boolean|double)@$/", $pattern);
     }
 
     private function extractType($pattern)

tests/JsonMatcher/TypeMatcherTest.php

@@ -0,0 +1,33 @@
+<?php
+namespace JsonMatcher\Tests;
+
+use JsonMatcher\Matcher\TypeMatcher;
+
+class TypeMatcherTest extends \PHPUnit_Framework_TestCase
+{
+    public function test_can_match()
+    {
+        $matcher = new TypeMatcher();
+        $this->assertTrue($matcher->canMatch('@integer@'));
+        $this->assertTrue($matcher->canMatch('@string@'));
+        $this->assertTrue($matcher->canMatch('@boolean@'));
+        $this->assertFalse($matcher->canMatch('@integer'));
+        $this->assertFalse($matcher->canMatch("qweqwe"));
+        $this->assertFalse($matcher->canMatch(1));
+        $this->assertFalse($matcher->canMatch("@string"));
+    }
+
+    public function test_type_match()
+    {
+        $matcher = new TypeMatcher();
+        $this->assertTrue($matcher->match(false, '@boolean@'));
+        $this->assertTrue($matcher->match("Norbert", '@string@'));
+        $this->assertTrue($matcher->match(1, '@integer@'));
+        $this->assertTrue($matcher->match(1.1, '@double@'));
+
+        $this->assertFalse($matcher->match("test", '@boolean@'));
+        $this->assertFalse($matcher->match(new \stdClass(), '@string@'));
+        $this->assertFalse($matcher->match(1.1, '@integer@'));
+        $this->assertFalse($matcher->match(false, '@double@'));
+    }
+}