public async Task Aggregate_SomeAnswers_ReturnResult() { // arrange var aggregator = new SingleChoiceAggregator(); var instruction = new SingleChoiceInstruction(new[] { "A", "B", "C" }); // act var result = await aggregator.Aggregate(instruction, new Dictionary <string, SingleChoiceAnswer> { { "1", new SingleChoiceAnswer("A") }, { "2", new SingleChoiceAnswer("A") }, { "3", new SingleChoiceAnswer("B") }, }); // assert var multipleChoiceResults = Assert.IsType <SelectionPollResults>(result); Assert.Equal(multipleChoiceResults.Options["A"], new[] { "1", "2" }); Assert.Equal(multipleChoiceResults.Options["B"], new[] { "3" }); Assert.Empty(multipleChoiceResults.Options["C"]); }