Added tests for invalid confirmation token handling

tests/Flarum/Api/Handler/InvalidConfirmationTokenExceptionHandlerTest.php

@@ -0,0 +1,30 @@
+<?php
+namespace Tests\Flarum\Api\Handler;
+
+use Flarum\Api\Handler\InvalidConfirmationTokenExceptionHandler;
+use Flarum\Core\Exception\InvalidConfirmationTokenException;
+use Tests\Test\TestCase;
+
+class InvalidConfirmationTokenExceptionHandlerTest extends TestCase
+{
+    private $handler;
+
+    public function init()
+    {
+        $this->handler = new InvalidConfirmationTokenExceptionHandler;
+    }
+
+    public function test_it_handles_recognisable_exceptions()
+    {
+        $this->assertFalse($this->handler->manages(new \Exception));
+        $this->assertTrue($this->handler->manages(new InvalidConfirmationTokenException));
+    }
+
+    public function test_output()
+    {
+        $response = $this->handler->handle(new InvalidConfirmationTokenException);
+
+        $this->assertEquals(403, $response->getStatus());
+        $this->assertEquals([['code' => 'invalid_confirmation_token']], $response->getErrors());
+    }
+}