I try to write a test that looks like this:
private static readonly IEnumerable<MyEnumType> ListOfEnumValues = Enum.GetValues(typeof(MyEnumType)).Cast<DocumentType>();
private static readonly IEnumerable<bool> ListOfBoolValues = new List<bool>(){true, false};
[Theory]
[TestData(ListOfEnumValues, ListOfBooleanValues)]
public void Test(EnumType type, bool myBool)
{
// test code
};
How is this possible?
Here is a possible solution:
public static IEnumerable<object[]> ListOfValues =>
from EnumType et in Enum.GetValues(typeof(EnumType))
from bool myBool in new[] { true, false }
select new object[] { et, myBool };
[Xunit.Theory]
[MemberData(nameof(ListOfValues))]
public void Test(EnumType type, bool myBool)
{
// test code
};
This will generate tests for all possible combinations.
If the enum has 3 values, and we have a bool like in the example, this would generate 6 (3 x 2) tests
You can take advantage of the yield return:
public static IEnumerable<object[]> ListOfValues()
{
foreach (var et in Enum.GetValues(typeof(EnumType)))
{
yield return new [] { et, true };
yield return new [] { et, false };
}
}
IMHO this approach might be a bit easier to understand than the multi source linq query expression.