public async ValueTask CountAsync_With_ValidData_Must_Succeed(int[] source) { // Arrange var wrapped = Wrap .AsAsyncValueEnumerable(source); var expected = Enumerable .Count(source); // Act var result = await AsyncValueEnumerableExtensions .CountAsync <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped); // Assert _ = result.Must() .BeEqualTo(expected); }