Created Common\ErrorHandler tests

module/Common/test/ErrorHandler/ContentBasedErrorHandlerTest.php

@@ -0,0 +1,75 @@
+<?php
+namespace ShlinkioTest\Shlink\Common\ErrorHandler;
+
+use PHPUnit_Framework_TestCase as TestCase;
+use Shlinkio\Shlink\Common\ErrorHandler\ContentBasedErrorHandler;
+use Shlinkio\Shlink\Common\ErrorHandler\ErrorHandlerManager;
+use Zend\Diactoros\Response;
+use Zend\Diactoros\ServerRequestFactory;
+use Zend\ServiceManager\ServiceManager;
+
+class ContentBasedErrorHandlerTest extends TestCase
+{
+    /**
+     * @var ContentBasedErrorHandler
+     */
+    protected $errorHandler;
+
+    public function setUp()
+    {
+        $this->errorHandler = new ContentBasedErrorHandler(new ErrorHandlerManager(new ServiceManager(), [
+            'factories' => [
+                'text/html' => [$this, 'factory'],
+                'application/json' => [$this, 'factory'],
+            ],
+        ]));
+    }
+
+    public function factory($container, $name)
+    {
+        return function () use ($name) {
+            return $name;
+        };
+    }
+
+    /**
+     * @test
+     */
+    public function correctAcceptHeaderValueInvokesErrorHandler()
+    {
+        $request = ServerRequestFactory::fromGlobals()->withHeader('Accept', 'foo/bar,application/json');
+        $result = $this->errorHandler->__invoke($request, new Response());
+        $this->assertEquals('application/json', $result);
+    }
+
+    /**
+     * @test
+     */
+    public function defaultContentTypeIsUsedWhenNoAcceptHeaderisPresent()
+    {
+        $request = ServerRequestFactory::fromGlobals();
+        $result = $this->errorHandler->__invoke($request, new Response());
+        $this->assertEquals('text/html', $result);
+    }
+
+    /**
+     * @test
+     */
+    public function defaultContentTypeIsUsedWhenAcceptedContentIsNotSupported()
+    {
+        $request = ServerRequestFactory::fromGlobals()->withHeader('Accept', 'foo/bar,text/xml');
+        $result = $this->errorHandler->__invoke($request, new Response());
+        $this->assertEquals('text/html', $result);
+    }
+
+    /**
+     * @test
+     * @expectedException \Shlinkio\Shlink\Common\Exception\InvalidArgumentException
+     */
+    public function ifNoErrorHandlerIsFoundAnExceptionIsThrown()
+    {
+        $this->errorHandler = new ContentBasedErrorHandler(new ErrorHandlerManager(new ServiceManager(), []));
+        $request = ServerRequestFactory::fromGlobals()->withHeader('Accept', 'foo/bar,text/xml');
+        $result = $this->errorHandler->__invoke($request, new Response());
+    }
+}