Nyholm / psr7

        $this->assertEquals('', $r->getHeaderLine('Bar'));

    }

    public function testHostIsNotOverwrittenWhenPreservingHost()

    {

        $r = new Request('GET', 'http://foo.com/baz?bar=bam', ['Host' => 'a.com']);

        $this->assertEquals(['Host' => ['a.com']], $r->getHeaders());

        $r2 = $r->withUri(new Uri('http://www.foo.com/bar'), true);

        $this->assertEquals('a.com', $r2->getHeaderLine('Host'));

    }

    public function testOverridesHostWithUri()

    {

        $this->assertEquals('a.com', $r2->getHeaderLine('Host'));

    }

    public function testOverridesHostWithUri()

    {

        $r = new Request('GET', 'http://foo.com/baz?bar=bam');

        $this->assertEquals(['Host' => ['foo.com']], $r->getHeaders());

        $r2 = $r->withUri(new Uri('http://www.baz.com/bar'));

        $this->assertEquals('www.baz.com', $r2->getHeaderLine('Host'));

    }

    public function testAggregatesHeaders()

    {