public function testIsError() { $this->assertTrue(ResponseCode::isError(ResponseCode::HTTP_NOT_FOUND)); $this->assertTrue(ResponseCode::isError(ResponseCode::HTTP_INTERNAL_SERVER_ERROR)); $this->assertTrue(ResponseCode::isError(ResponseCode::HTTP_BAD_GATEWAY)); $this->assertTrue(ResponseCode::isError(ResponseCode::HTTP_BAD_REQUEST)); $this->assertFalse(ResponseCode::isError(ResponseCode::HTTP_OK)); $this->assertFalse(ResponseCode::isError(ResponseCode::HTTP_CONTINUE)); $this->assertFalse(ResponseCode::isError(ResponseCode::HTTP_IM_A_TEAPOT)); $this->assertFalse(ResponseCode::isError('')); $this->assertFalse(ResponseCode::isError('a')); $this->assertTrue(ResponseCode::isError('999')); }