PhlyTest\Http\ServerRequestTest::testAttributeMutatorReturnsCloneWithChanges PHP Method

    public function testAttributeMutatorReturnsCloneWithChanges()
    {
        $request = $this->request->withAttribute('foo', 'bar');
        $this->assertNotSame($this->request, $request);
        $this->assertEquals('bar', $request->getAttribute('foo'));
        return $request;
    }