/**
* This method delegates to the error stacks isError, so we will test
* by manipulating the error stack injected during setUp
*
* @depends testGetSetErrorStack
* @return null
*/
public function testIsError()
{
/* make sure the error stack has no errors */
$this->assertFalse($this->errorStack->isError());
$this->assertFalse($this->response->isError());
$this->errorStack->addError('my error');
$this->assertTrue($this->errorStack->isError());
$this->assertTrue($this->response->isError());
}
