I have a unit test where I use .Returns() to return some sample data:
[TestMethod]
public void TestRetrieveElementsInVersion()
{
IRetrieveElementSequence component = Substitute.For<IRetrieveElementSequence>();
List<UnconstructedElement> list = new List<UnconstructedElement>
{
new UnconstructedElement{Version = "1"},
new UnconstructedElement{Version = "2"}
};
component.RetrieveElements().Returns(list); // exception reported here
const string target = "1";
IRetrieveElementSequence service = new RetrieveElementsInAVersion(component, target);
IList<UnconstructedElement> result = service.RetrieveElements();
bool check = result.All(e => e.Version == target);
Assert.IsTrue(check);
}
This code passes in Visual Studio using the ReSharper runner, when the test is run alone. It fails when it runs as part of a list, like when I Run All Tests from Solution.
NSubstitute.Exceptions.UnexpectedArgumentMatcherException: Argument matchers (Arg.Is, Arg.Any) should only be used in place of member arguments. Do not use in a Returns() statement or anywhere else outside of a member call.
I don't see where I am even using Arg.Any or Arg.Is. What am I doing that makes NSubstitute complain? This happens when I use the .Returns() to return lists of non-native objects.
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