CODEWITHSUNDEEP
c#xunit
rACkle
rACkle

Reputation: 793

How to populate xUnit [Theory] and [InlineData] with values from a method

Is there a way to input data into [InlineData] values for xUnit tests? I can't seem to do so as it requires constants.

Upvotes: 4

Views: 9272

Answers (1)

marschelpoet
marschelpoet

Reputation: 230

For calling Methods as data you have to use [MemberData] rather than [InlineData]. In MemberData you can specify a function via nameof, which returns the expected parameters as result.

    public static IEnumerable<object[]> GetNumbers()
    {
        yield return new object[] { 5, 1, 3, 9 };
        yield return new object[] { 7, 1, 5, 3 };
    }

    [Theory]
    [MemberData(nameof(GetNumbers))]
    public void AllNumbers_AreOdd_WithMemberData(int a, int b, int c, int d)
    {
        Assert.True(IsOddNumber(a));
        Assert.True(IsOddNumber(b));
        Assert.True(IsOddNumber(c));
        Assert.True(IsOddNumber(d));
    }

I am not sure but if I remeber correctly, the function you call, needs to return IEnumerable<object[]>, which XUnit will sort out into the parameters of the test, and you have to use yield return if you want multiple datasets to be used.

Upvotes: 4

Related Questions