private TestRunResult RunTestSession(IList <Mutant> mutantsToTest, ITimeoutValueCalculator timeoutMs,
TestUpdateHandler updateHandler, bool forceSingle)
{
TestRunResult result;
Logger.LogTrace($"Testing {string.Join(" ,", mutantsToTest.Select(x => x.DisplayName))}.");
if (forceSingle && mutantsToTest.Count > 1)
{
foreach (var mutant in mutantsToTest)
{
var localResult = TestRunner.TestMultipleMutants(timeoutMs, new[] { mutant }, updateHandler);
mutant.AnalyzeTestRun(localResult.FailingTests, localResult.RanTests, localResult.TimedOutTests);
}
return(new TestRunResult(true));
}
else
{
result = TestRunner.TestMultipleMutants(timeoutMs, mutantsToTest.ToList(), updateHandler);
if (updateHandler == null)
{
foreach (var mutant in mutantsToTest)
{
mutant.AnalyzeTestRun(result.FailingTests, result.RanTests, result.TimedOutTests);
}
}
}
return(result);
}
public void Test(IList <Mutant> mutantsToTest, ITimeoutValueCalculator timeoutMs, TestUpdateHandler updateHandler)
{
var forceSingle = false;
while (mutantsToTest.Any())
{
var result = RunTestSession(mutantsToTest, timeoutMs, updateHandler, forceSingle);
Logger.LogTrace(
$"Test run for {string.Join(" ,", mutantsToTest.Select(x => x.DisplayName))} is {(result.FailingTests.Count == 0 ? "success" : "failed")} with output: {result.ResultMessage}");
var remainingMutants = mutantsToTest.Where((m) => m.ResultStatus == MutantStatus.NotRun).ToList();
if (remainingMutants.Count == mutantsToTest.Count)
{
// the test failed to get any conclusive results
if (!result.SessionTimedOut)
{
// something bad happened.
Logger.LogError($"Stryker failed to test {remainingMutants.Count} mutant(s).");
return;
}
// test session's results have been corrupted by the time out
// we retry and run tests one by one, if necessary
if (remainingMutants.Count == 1)
{
// only one mutant was tested, we mark it as timeout.
remainingMutants[0].ResultStatus = MutantStatus.Timeout;
remainingMutants.Clear();
}
else
{
// we don't know which tests timed out, we rerun all tests in dedicated sessions
forceSingle = true;
}
}
if (remainingMutants.Any())
{
Logger.LogDebug("Not all mutants were tested.");
}
mutantsToTest = remainingMutants;
}
}
public TestRunResult RunAll(ITimeoutValueCalculator timeoutMs, Mutant activeMutant, TestUpdateHandler update)
{
return(TestMultipleMutants(timeoutMs, activeMutant == null ? null : new List <Mutant> {
activeMutant
}, update));
}
public InitialTestRun(TestRunResult result, ITimeoutValueCalculator timeoutValueCalculator)
{
Result = result;
TimeoutValueCalculator = timeoutValueCalculator;
}
public TestRunResult TestMultipleMutants(ITimeoutValueCalculator timeoutCalc, IReadOnlyList <Mutant> mutants, TestUpdateHandler update)
{
var mutantTestsMap = new Dictionary <int, ITestGuids>();
var needAll = true;
ICollection <Guid> testCases;
int?timeOutMs = timeoutCalc?.DefaultTimeout;
if (mutants != null)
{
// if we optimize the number of tests to run
if (_options.OptimizationMode.HasFlag(OptimizationModes.CoverageBasedTest))
{
needAll = false;
foreach (var mutant in mutants)
{
ITestListDescription tests;
if ((mutant.IsStaticValue && !_options.OptimizationMode.HasFlag(OptimizationModes.CaptureCoveragePerTest)) || mutant.MustRunAgainstAllTests)
{
tests = TestsGuidList.EveryTest();
needAll = true;
}
else
{
tests = mutant.CoveringTests;
}
mutantTestsMap.Add(mutant.Id, tests);
}
testCases = needAll ? null : mutants.SelectMany(m => m.CoveringTests.GetGuids()).ToList();
_logger.LogTrace($"{RunnerId}: Testing [{string.Join(',', mutants.Select(m => m.DisplayName))}] " +
$"against {(testCases == null ? "all tests." : string.Join(", ", testCases))}.");
if (testCases?.Count == 0)
{
return(new TestRunResult(TestsGuidList.NoTest(), TestsGuidList.NoTest(), TestsGuidList.NoTest(), "Mutants are not covered by any test!", TimeSpan.Zero));
}
if (timeoutCalc != null && testCases != null)
{
// compute time out
var duration = (int)testCases.Select(id => _vsTests[id].InitialRunTime.TotalMilliseconds).Sum();
timeOutMs = timeoutCalc.CalculateTimeoutValue(duration);
}
}
else
{
if (mutants.Count > 1)
{
throw new GeneralStrykerException("Internal error: trying to test multiple mutants simultaneously without 'perTest' coverage analysis.");
}
mutantTestsMap.Add(mutants[0].Id, TestsGuidList.EveryTest());
testCases = null;
}
}
else
{
testCases = null;
}
var numberTestCases = testCases == null ? 0 : testCases.Count;
var expectedTests = needAll ? DiscoverTests().Count : numberTestCases;
void HandleUpdate(IRunResults handler)
{
var handlerTestResults = handler.TestResults;
if (mutants == null)
{
return;
}
var tests = handlerTestResults.Count == DiscoverTests().Count
? (ITestGuids)TestsGuidList.EveryTest()
: new WrappedGuidsEnumeration(handlerTestResults.Select(t => t.TestCase.Id));
var failedTest = new WrappedGuidsEnumeration(handlerTestResults.Where(tr => tr.Outcome == TestOutcome.Failed)
.Select(t => t.TestCase.Id));
var timedOutTest = new WrappedGuidsEnumeration(handler.TestsInTimeout?.Select(t => t.Id));
var remainingMutants = update?.Invoke(mutants, failedTest, tests, timedOutTest);
if (handlerTestResults.Count >= expectedTests || remainingMutants != false || _aborted)
{
return;
}
// all mutants status have been resolved, we can stop
_logger.LogDebug($"{RunnerId}: Each mutant's fate has been established, we can stop.");
_vsTestConsole.CancelTestRun();
_aborted = true;
}
_logger.LogDebug("Using {0} ms as testrun timeout", timeOutMs.ToString() ?? "no");
var testResults = RunTestSession(mutantTestsMap, needAll, GenerateRunSettings(timeOutMs, mutants != null, false, mutantTestsMap), HandleUpdate);
return(BuildTestRunResult(testResults, expectedTests));
}
