How to fail test if result is not found in a loop c#

Question

I have a for loop in which I look for attributes that match what I have typed in as a parameter. It passes when it is found but when it isn't found, it keeps looping through. I need a way in which to get the test to fail if it isn't found.

foreach (IWebElement link in links)
{
    string text = link.GetAttribute("alt");
    if (text == transportMode)
    {
        Assert.AreEqual(text, transportMode);
    }
}

Surely you can just `break` or `throw` when the condition is not met? — Equalsk, Jan 05 '17 at 14:53
You're skipping the assertion if the values aren't equal with your `if` clause. Don't test and then assert, just assert. — Marc L., Jan 05 '17 at 14:56

wkl · Answer 1 · 2017-01-06T06:27:26.213

2

No need to assert inside the loop (because your if statement checks exactly the same). Just jump out of the test if you found it. Otherwise fail at the end of the test:

foreach (IWebElement link in links)
{
    string text = link.GetAttribute("alt");
    if (text == transportMode)
    {
        return;
    }
}
Assert.Fail("not found");

You may want to think of a more clever message than I used.

edited Jan 06 '17 at 06:27

answered Jan 05 '17 at 14:55

wkl

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Thank you. That's fixed my problem. – Coder Jan 05 '17 at 15:05
The OP used curly braces with the if statement. Please don't encourage by way of example not using them. – jibbs Jan 05 '17 at 15:06
@jibbs Ok, I changed it. – wkl Jan 06 '17 at 06:28

score 1 · Answer 2 · answered Jan 05 '17 at 14:54

1

You haven't mentioned whether this is NUnit or MSTest, but in both cases

Assert.Fail("Error message");

fails the test

answered Jan 05 '17 at 14:54

György Kőszeg

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score 1 · Answer 3 · answered Jan 05 '17 at 15:16

1

Pretty simple using LINQ:

Assert.IsTrue(links.Select(l => l.GetAttribute("alt")).Contains(transportMode));

answered Jan 05 '17 at 15:16

chambo

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How to fail test if result is not found in a loop c#

3 Answers3