Null Reference Type with OneTimeSetUp

user_439652 0
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Is possible to use

<Nullable>enable</Nullable>

in projects developed in nunit that uses fields that are initialized in OneTimeSetup without getting "warning CS8618: Non-nullable field '...' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.".

I expected to be an annotation like [NotNull] for fields that I initialize in OneTimeSetup, but didn't work.

nunit c#
1 Answers

One (somewhat unpleasant!) way is to use the null forigiving operator:

private string _setInOneTimeSetUp = null!;

[OneTimeSetUp]
public void OneTimeSetUp()
{
    _setInOneTimeSetUp = "value used in tests";
}

This compiles with both <Nullable>enable</Nullable> and <TreatWarningsAsErrors>true</TreatWarningsAsErrors>. Given NUnit will always call OneTimeSetUp before anything else, it is logically safe, but any time you're using the null forgiving operator is a bit of a code smell.

user_19159610
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