Add Bad Request problem

Author: Lander Vanderstraeten

spec/Http/BadRequestProblemSpec.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace spec\Phpro\ApiProblem\Http;
+
+use Phpro\ApiProblem\Http\BadRequestProblem;
+use Phpro\ApiProblem\Http\HttpApiProblem;
+use PhpSpec\ObjectBehavior;
+
+class BadRequestProblemSpec extends ObjectBehavior
+{
+    public function let(): void
+    {
+        $this->beConstructedWith('a reason');
+    }
+
+    public function it_is_initializable(): void
+    {
+        $this->shouldHaveType(BadRequestProblem::class);
+    }
+
+    public function it_is_an_http_api_problem(): void
+    {
+        $this->shouldHaveType(HttpApiProblem::class);
+    }
+
+    public function it_can_parse_to_array(): void
+    {
+        $this->toArray()->shouldBe([
+            'status' => 400,
+            'type' => HttpApiProblem::TYPE_HTTP_RFC,
+            'title' => HttpApiProblem::getTitleForStatusCode(400),
+            'detail' => 'a reason',
+        ]);
+    }
+}

src/Http/BadRequestProblem.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Phpro\ApiProblem\Http;
+
+class BadRequestProblem extends HttpApiProblem
+{
+    public function __construct(string $detail)
+    {
+        parent::__construct(400, [
+            'detail' => $detail,
+        ]);
+    }
+}