Altax\Module\Task\Process\ProcessResult::isFailed PHP Method

    public function isFailed()
    {
        return !$this->isSuccessful();
    }

 public function testIsFailed()
 {
     $processResult = new ProcessResult(1, "aaaa");
     $this->assertEquals(true, $processResult->isFailed());
     $processResult = new ProcessResult(0, "aaaa");
     $this->assertEquals(false, $processResult->isFailed());
 }