public function testSetHeaders()
{
$request = new Request('http://google.com', 'GET');
$request->setHeaders(array('foo' => 'bar'), true);
$this->assertEquals(array('foo' => 'bar'), $request->getRawHeaders(), 'Set headers failed');
$request->setHeaders(array('foo' => 'bar2'), true);
$this->assertEquals(array('foo' => 'bar2'), $request->getRawHeaders(), 'Overwrite headers failed');
$request->setHeaders(array('foo2' => 'bar'), true);
$this->assertEquals(array('foo' => 'bar2', 'foo2' => 'bar'), $request->getRawHeaders(), 'Set second headers failed');
$request->setHeaders(array('bla' => 'blub'));
$this->assertEquals(array('bla' => 'blub'), $request->getRawHeaders(), 'Reset headers failed');
}