public function testHandleError()
{
$errorHandler = new Collecting();
$this->assertFalse($errorHandler->hasErrors());
$this->assertEmpty($errorHandler->getErrors());
$errorHandler->handleError($e1 = new Error('Test 1'));
$errorHandler->handleError($e2 = new Error('Test 2'));
$this->assertTrue($errorHandler->hasErrors());
$this->assertSame([$e1, $e2], $errorHandler->getErrors());
$errorHandler->clearErrors();
$this->assertFalse($errorHandler->hasErrors());
$this->assertEmpty($errorHandler->getErrors());
}