public IEnumerable<Violation> Apply(TestCase testCase)
{
var calledAssertingMethods = testCase.GetCalledAssertingMethods();
var tracker = new MethodValueTracker(testCase.TestMethod);
// For each asserting method with >= 1 parameters:
foreach (var cm in calledAssertingMethods)
{
var methodRef = cm.MethodReference;
var parameterPurposes = testCase.Framework.GetParameterPurposes(methodRef);
if (!IsSingleTruthCheckingMethod(methodRef, parameterPurposes))
continue;
foreach (var valueGraph in tracker.ValueGraphs)
{
IList<MethodValueTracker.Value> consumedValues =
tracker.GetConsumedValues(valueGraph, cm.Instruction).ToList();
if (consumedValues.Count == 0)
continue; // not part of value graph
var interestingValue = consumedValues[0];
var producers = UltimateProducers(interestingValue);
if (producers.Count > 1)
{
yield return new Violation(this, testCase, cm.Instruction, string.Format("{0}.{1} performs a boolean test on a composite boolean value",
cm.MethodReference.DeclaringType.Name,
cm.MethodReference.Name));
}
}
}
}
private static int CountAssertsThatDontOccurInAllInstructionPaths(TestCase testCase, IEnumerable<IList<Instruction>> paths)
{
//TODO: Copied from LocalExpectationRule, need a better abstraction for this!
var calledAssertingMethods = testCase.GetCalledAssertingMethods();
var calledAssertingMethodsWithInstruction =
testCase.TestMethod.CalledMethods().Where(calledAssertingMethods.Contains);
return
calledAssertingMethodsWithInstruction.Count(cmi => paths.Any(path => !path.Contains(cmi.Instruction)));
}
public IEnumerable<Violation> Apply(TestCase testCase)
{
// It seems as if unhandled return values are popped off the stack
// immediately via an explicit "pop" instruction.
// We exclude asserting methods to avoid getting a violation for Assert.Throws (or Assert.Catch),
// which returns the exception.
var calledMethods = testCase.TestMethod.CalledMethods();
var asserting = testCase.GetCalledAssertingMethods();
var callingNonVoidInstructions = calledMethods
.Where(cm => !asserting.Contains(cm))
.Select(cm => cm.Instruction);
var unhandled = callingNonVoidInstructions.Where(ins => ins.Next.OpCode == OpCodes.Pop).ToList();
if (unhandled.Count == 1 && testCase.Framework.HasExpectedException(testCase.TestMethod))
yield break; // last unhandled value is ok!
foreach (var instr in unhandled)
{
yield return new Violation(this, testCase, instr, CreateViolationMessage(instr));
}
}
public IEnumerable<Violation> Apply(TestCase testCase)
{
if (!testCase.TestMethod.DeclaringType.Module.HasSymbols)
yield break; //TODO: decide what to do here!
var assertingMethods = testCase.GetCalledAssertingMethods();
// Note: The Mono compiler appears to emit multiple sequence points with the same start line,
// i.e. there are multiple instructions with sequence points that refer to the same line.
// Therefore, let's store line numbers and associate line numbers with asserting calls.
var sequencePointsStartLines = new SortedSet<int>();
var assertingSequencePointsStartLines = new SortedSet<int>();
var tm = testCase.TestMethod;
foreach (var ins in tm.Body.Instructions)
{
var sp = ins.SequencePoint;
if (sp != null && IsSignificantSequencePoint(ins, sp))
{
sequencePointsStartLines.Add(sp.StartLine);
}
if (sequencePointsStartLines.Count > 0 && IsAssertCall(ins, assertingMethods))
{
// As sequence point, use the last one added, which isn't necessarily sp,
// since the asserting instruction may lack sequence point.
var lastSpLineNumber = sequencePointsStartLines.Last();
assertingSequencePointsStartLines.Add(lastSpLineNumber);
}
}
if (assertingSequencePointsStartLines.Count == 0)
yield break; // this rule doesn't apply
// If the X asserting sps are the X last ones, then it's ok!
if (sequencePointsStartLines.EndsWith(assertingSequencePointsStartLines))
yield break;
yield return new Violation(this, testCase);
}
public IEnumerable<Violation> Apply(TestCase testCase)
{
// Store the framework so that we don't have to pass it around everywhere.
_framework = testCase.Framework;
var calledAssertingMethods = testCase.GetCalledAssertingMethods();
var tracker = new MethodValueTracker(testCase.TestMethod);
var whitelistedFields = FindWhitelistedFields(testCase.TestMethod.DeclaringType);
// For each asserting method with >= 1 parameters:
foreach (var cm in calledAssertingMethods.Where(cm => cm.MethodDefinition.HasParameters))
{
var method = cm.MethodDefinition;
//TODO: if the method is a helper, we need to "unfold" the helper
// to get to the real asserting methods, and this will require us
// to join value-generation graphs across method calls...
var paramPurposes = _framework.GetParameterPurposes(method);
if (paramPurposes == null) continue; // unknown method, rule does not apply
foreach (var valueGraph in tracker.ValueGraphs)
{
IList<MethodValueTracker.Value> consumedValues = tracker.GetConsumedValues(valueGraph, cm.Instruction).ToList();
if (consumedValues.Count == 0)
continue; // not part of value graph
// Build a list of arguments with the details we need to know if the rule applies.
var arguments = method.Parameters
.Select((p, index) => new ArgumentDetails { Method = method, Index = index, Purpose = paramPurposes[index], ConsumedValue = consumedValues[index] }).ToList();
// Handle cases like Assert.IsTrue(x == 5) by expanding arguments
ExpandIfSingleTruthCheckingMethod(method, ref arguments);
// We're only interested in arguments that represent expectations!
var interestingArguments = arguments.Where(a => IsPerhapsExpectation(a.Purpose)).ToList();
// This might happen with for example Assert.Fail("some reason").
if (interestingArguments.Count == 0)
continue;
// Add in the "forbidden producer", if any, for each argument. A forbidden producer is an
// instruction that generates a value externally, such as a call.
interestingArguments = interestingArguments.Select(
a => { a.ForbiddenProducer = FirstForbiddenProducer(valueGraph, a.ConsumedValue, whitelistedFields); return a; }).ToList();
// If there is at least one locally produced argument, the rule doesn't apply.
if (interestingArguments.Any(IsLocallyProduced))
continue;
if (interestingArguments.All(a => a.Purpose == ParameterPurpose.ExpectedOrActual))
{
// Since we don't know exactly which parameter that represents the expectation, we
// just generate a single violation.
yield return new Violation(this, testCase, interestingArguments[0].ConsumedValue.Consumer,
CreateViolationMessageForUncertainCase(interestingArguments[0]));
continue;
}
foreach (var a in interestingArguments.Where(IsExternallyProduced))
{
// Generate a violation at the location of the forbidden producer!
yield return new Violation(this, testCase, a.ForbiddenProducer, CreateViolationMessage(a));
}
}
}
}
protected override int GenerateValue(TestCase tc, Features f)
{
return tc.GetCalledAssertingMethods().Count;
}