Added constructors for common Response instances

Author: shudd3r

src/Response.php

@@ -92,6 +92,16 @@ public static function redirect($uri, int $status = 303): self
         return new self($status, null, ['Location' => (string) $uri]);
     }
 
+    public static function badRequest(StreamInterface $body = null): self
+    {
+        return new self(400, $body);
+    }
+
+    public static function unauthorized(StreamInterface $body = null): self
+    {
+        return new self(401, $body);
+    }
+
     public static function notFound(StreamInterface $body = null): self
     {
         return new self(404, $body);

tests/ResponseTest.php

@@ -138,10 +138,9 @@ public function testNamedConstructors()
             new Response(301, null, ['Location' => '/foo/bar/baz']),
             Response::redirect('/foo/bar/baz', 301)
         );
-        $this->equivalentConstructs(
-            new Response(404),
-            Response::notFound()
-        );
+        $this->equivalentConstructs(new Response(400), Response::badRequest());
+        $this->equivalentConstructs(new Response(401), Response::unauthorized());
+        $this->equivalentConstructs(new Response(404), Response::notFound());
         $this->equivalentConstructs(
             new Response(404, new FakeStream('Not Found. Sorry.')),
             Response::notFound(new FakeStream('Not Found. Sorry.'))