Add file loader for JSON

Fixes #2

src/FileLoader.php

@@ -112,6 +112,7 @@ public function load($fileName, $refresh = false)
 
             $loaderResolver = new LoaderResolver(array(
                 new YamlFileLoader($locator),
+                new JsonFileLoader($locator),
             ));
 
             $delegatingLoader = new DelegatingLoader($loaderResolver);

src/JsonFileLoader.php

@@ -0,0 +1,33 @@
+<?php
+/*
+ * Copyright (c) 2015 Matthew Loberg
+ * Distributed under the MIT License (http://opensource.org/licenses/MIT)
+ */
+
+namespace Mlo\FileLoader;
+
+use Symfony\Component\Config\Loader\FileLoader as BaseFileLoader;
+
+/**
+ * JsonFileLoader
+ *
+ * @author Matthew Loberg <loberg.matt@gmail.com>
+ */
+class JsonFileLoader extends BaseFileLoader
+{
+    /**
+     * @inheritDoc
+     */
+    public function load($resource, $type = null)
+    {
+        return json_decode(file_get_contents($resource), true);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function supports($resource, $type = null)
+    {
+        return is_string($resource) && 'json' === pathinfo($resource, PATHINFO_EXTENSION);
+    }
+}

tests/FileLoaderTest.php

@@ -95,7 +95,7 @@ public function testSetGetCacheDirectory()
     /**
      * @covers ::load
      */
-    public function testLoad()
+    public function testLoadYaml()
     {
         $this->loader->addDirectory($this->dataDirectory);
 
@@ -108,6 +108,22 @@ public function testLoad()
         $this->assertTrue(file_exists($this->cacheDirectory . '/test.yml.php'));
     }
 
+    /**
+     * @covers ::load
+     */
+    public function testLoadJson()
+    {
+        $this->loader->addDirectory($this->dataDirectory);
+
+        $this->assertFalse(file_exists($this->cacheDirectory . '/data.json.php'));
+
+        $values = $this->loader->load('data.json');
+
+        $this->assertEquals('bar', $values['foo']);
+
+        $this->assertTrue(file_exists($this->cacheDirectory . '/data.json.php'));
+    }
+
     /**
      * @covers ::load
      */

tests/JsonFileLoaderTest.php

@@ -0,0 +1,52 @@
+<?php
+/*
+ * Copyright (c) 2015 Matthew Loberg
+ * Distributed under the MIT License (http://opensource.org/licenses/MIT)
+ */
+
+namespace Mlo\FileLoader\Tests;
+
+use Mlo\FileLoader\JsonFileLoader;
+use Symfony\Component\Config\FileLocator;
+
+/**
+ * @coversDefaultClass \Mlo\FileLoader\JsonFileLoader
+ */
+class JsonFileLoaderTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var JsonFileLoader
+     */
+    private $jsonFileLoader;
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp()
+    {
+        $this->jsonFileLoader = new JsonFileLoader(new FileLocator());
+    }
+
+    /**
+     * @covers ::supports
+     */
+    public function testSupports()
+    {
+        $this->assertFalse($this->jsonFileLoader->supports(new \stdClass()));
+        $this->assertTrue($this->jsonFileLoader->supports('data.json'));
+        $this->assertFalse($this->jsonFileLoader->supports('data.yml'));
+    }
+
+    /**
+     * @covers ::load
+     */
+    public function testLoad()
+    {
+        $values = $this->jsonFileLoader->load(__DIR__ . '/data/data.json');
+
+        $this->assertInternalType('array', $values);
+        $this->assertEquals('bar', $values['foo']);
+        $this->assertEquals('world', $values['name']);
+        $this->assertEquals('hello', $values['greeting']);
+    }
+}

tests/data/data.json

@@ -0,0 +1,5 @@
+{
+    "foo": "bar",
+    "name": "world",
+    "greeting": "hello"
+}