PhlyTest\Http\Request\SerializerTest::testSerializesMultipleHeadersCorrectly PHP Method

    public function testSerializesMultipleHeadersCorrectly()
    {
        $request = (new Request())->withMethod('GET')->withUri(new Uri('http://example.com/foo/bar?baz=bat'))->withAddedHeader('X-Foo-Bar', 'Baz')->withAddedHeader('X-Foo-Bar', 'Bat');
        $message = Serializer::toString($request);
        $this->assertContains("X-Foo-Bar: Baz", $message);
        $this->assertContains("X-Foo-Bar: Bat", $message);
    }