public async Task When_Passing_Null_Parameter_Then_Exception_Is_Thrown()
{
// ARRANGE
InitializeFakeObjects();
// ACT & ASSERT
await Assert.ThrowsAsync <ArgumentNullException>(() => _getResourceOwnerAction.Execute(null));
}
public Task<ResourceOwner> GetResourceOwner(string subject)
{
return _getResourceOwnerAction.Execute(subject);
}