created mocks for testing

tests/Webservice/Formatter/JsonTest.php

@@ -1,17 +1,34 @@
 <?php
-
 namespace BSR\Webservice\Formatter;
 
-class Json extends Formatter {
-    protected static function init() {
-        self::registerFormats(array(
-            'application/json',
-            'application/x-json',
-        ));
+use PHPUnit\Framework\TestCase;
+
+class JsonTest extends TestCase
+{
+    protected $accept = array(
+        'application/json',
+        'application/x-json',
+    );
+
+    public function testRenderEncodesDataIntoJsonFormat()
+    {
+        $format = new Json();
+        $someArray = array(
+            'asdf' => array(1, 'a', 'b', array()),
+            '1' => array(3 => 'c'),
+            0 => 'hello',
+        );
+        ob_start();
+        $format->render($someArray);
+        $jsonRepresentation = ob_get_clean();
+        $this->assertSame(json_decode($jsonRepresentation, true), $someArray);
     }
 
-    public function render($data) {
-        echo json_encode($data);
+    public function testRegistersItsFormatAcceptHeader()
+    {
+        Formatter::getFormatter();
+        $formats = Formatter::getRegisterdFormats();
+        $this->assertSame(array_intersect($this->accept, array_keys($formats)), $this->accept);
     }
 }