public async Task <Result <int> > AddResult(string userId, TestResultCreateDto testResultCreateDto)
{
var test = await dataStorage.Tests.GetAsync(testResultCreateDto.TestId);
if (userId is null)
{
return(Result.Fail <int>(-42));
}
if (test is null)
{
return(Result.Fail <int>(-1));
}
var answers = (await dataStorage.Answers.GetCorrectAnswersForTest(testResultCreateDto.TestId)).ToList();
var correctAnswersNumber = answers.Join(testResultCreateDto.Answers,
correctAnswer => correctAnswer.QuestionId,
userAnswer => userAnswer.Key,
(correctAnswer, userAnswer) => correctAnswer.Id == userAnswer.Value)
.Count(result => result);
double usersTestResult = (correctAnswersNumber / (double)answers.Count) * 100;
var testResult = new TestResult
{
TestId = testResultCreateDto.TestId,
Result = usersTestResult,
UserId = userId,
AttemptDate = DateTime.Today
};
dataStorage.TestResults.Add(testResult);
await dataStorage.SaveChangesAsync();
return(Result.Ok(testResult.Id));
}
public async Task AddResultTest()
{
unitOfWorksMock
.Setup(u => u.Tests.GetAsync(It.IsAny <int>()))
.ReturnsAsync((int id) => new Test
{
Id = id,
Questions = new List <Question>()
});
unitOfWorksMock
.Setup(u => u.Answers.GetCorrectAnswersForTest(It.IsAny <int>()))
.ReturnsAsync((int id) => new []
{
new Answer
{
Id = 1,
QuestionId = 1,
IsCorrect = true
},
new Answer
{
Id = 5,
QuestionId = 2,
IsCorrect = true
}
});
var testResultCreateDto = new TestResultCreateDto
{
TestId = 1,
UserId = "user_id",
Answers = new []
{
new KeyValuePair <int, int>(1, 1),
new KeyValuePair <int, int>(2, 5)
}
};
double expectedResult = 100;
unitOfWorksMock
.Setup(u => u.TestResults.Add(It.IsAny <TestResult>()))
.Callback((TestResult testResult) => Assert.AreEqual(expectedResult, testResult.Result, 0.001));
var result = await testResultService.AddResult("user_id", testResultCreateDto);
Assert.IsTrue(result.Success);
testResultCreateDto.Answers = new[]
{
new KeyValuePair <int, int>(1, 1),
new KeyValuePair <int, int>(2, 2)
};
expectedResult = 50;
result = await testResultService.AddResult("user_id", testResultCreateDto);
Assert.IsTrue(result.Success);
testResultCreateDto.Answers = new KeyValuePair <int, int> [0];
expectedResult = 0;
result = await testResultService.AddResult("user_id", testResultCreateDto);
Assert.IsTrue(result.Success);
}
