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#define CONTRACTS_FULL
#define DEBUG
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;
using System.Diagnostics.Contracts.Internal;
using System.Diagnostics.Contracts;
using MonoTests.System.Diagnostics.Contracts.Helpers;
using NUnit.Framework.Constraints;
namespace MonoTests.System.Diagnostics.Contracts {
[TestFixture]
public class ContractHelperTest : TestContractBase {
private void CheckAllMessages (ContractFailureKind kind, string messageStart, Action<string, Exception, string, ContractFailureKind, Func<string>> fnAssert)
{
foreach (Exception ex in new [] { null, new ArgumentNullException () }) {
fnAssert (messageStart + ".", ex, null, kind, () => {
return ContractHelper.RaiseContractFailedEvent (kind, null, null, ex);
});
fnAssert (messageStart + ". Message", ex, null, kind, () => {
return ContractHelper.RaiseContractFailedEvent (kind, "Message", null, ex);
});
fnAssert (messageStart + ": Condition", ex, "Condition", kind, () => {
return ContractHelper.RaiseContractFailedEvent (kind, null, "Condition", ex);
});
fnAssert (messageStart + ": Condition Message", ex, "Condition", kind, () => {
return ContractHelper.RaiseContractFailedEvent (kind, "Message", "Condition", ex);
});
}
}
private void CheckAllKinds (Action<string, Exception, string, ContractFailureKind, Func<string>> fnAssert)
{
this.CheckAllMessages (ContractFailureKind.Assert, "Assertion failed", fnAssert);
this.CheckAllMessages (ContractFailureKind.Assume, "Assumption failed", fnAssert);
this.CheckAllMessages (ContractFailureKind.Invariant, "Invariant failed", fnAssert);
this.CheckAllMessages (ContractFailureKind.Postcondition, "Postcondition failed", fnAssert);
this.CheckAllMessages (ContractFailureKind.PostconditionOnException, "Postcondition failed after throwing an exception", fnAssert);
this.CheckAllMessages (ContractFailureKind.Precondition, "Precondition failed", fnAssert);
}
private void CheckAllKinds (Action<string, Exception, Func<string>> fnAssert)
{
this.CheckAllKinds ((expected, ex, condition, kind, fnTest) => fnAssert (expected, ex, fnTest));
}
/// <summary>
/// If no event handler is present, then the string returned describes the condition failure.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractFailedEventNoHandler ()
{
this.CheckAllKinds ((expected, ex, fnTest) => {
string msg = fnTest ();
Assert.AreEqual (expected, msg, "TestRaiseContractFailedEventNoHandler() incorrect message");
});
}
/// <summary>
/// When SetHandled() is called, null is returned.
/// The event args are also checked.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractFailedEventHandled ()
{
string expectedMsg = null;
Exception originalException = null;
string expectedCondition = null;
ContractFailureKind expectedKind = ContractFailureKind.Assert;
Contract.ContractFailed += (sender, e) => {
Assert.AreEqual (expectedMsg, e.Message, "TestRaiseContractFailedEventHandled() event message wrong");
Assert.AreSame (originalException, e.OriginalException, "TestRaiseContractFailedEventHandled() event exception wrong");
Assert.AreEqual (expectedCondition, e.Condition, "TestRaiseContractFailedEventHandled() event condition wrong");
Assert.AreEqual (expectedKind, e.FailureKind, "TestRaiseContractFailedEventHandled() event failure kind wrong");
e.SetHandled ();
};
this.CheckAllKinds ((expected, ex, condition, kind, fnTest) => {
expectedMsg = expected;
originalException = ex;
expectedCondition = condition;
expectedKind = kind;
string msg = fnTest ();
Assert.IsNull (msg, "TestRaiseContractFailedEventHandled() expected null message");
});
}
/// <summary>
/// When SetUnwind() is called, a ContractException is thrown. If an innerException is passed, then
/// it is put in the InnerException of the ContractException. Otherwise, the InnerException is set to null.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractFailedEventUnwind ()
{
Contract.ContractFailed += (sender, e) => {
e.SetUnwind ();
};
this.CheckAllKinds ((expected, expectedEx, fnTest) => {
try {
fnTest ();
Assert.Fail ("TestRaiseContractFailedEventUnwind() exception not thrown");
} catch (Exception ex) {
Assert.IsInstanceOfType (base.ContractExceptionType, ex, "TestRaiseContractFailedEventUnwind() wrong exception type");
if (expectedEx == null) {
Assert.IsNull (ex.InnerException, "TestRaiseContractFailedEventUnwind() inner exception should be null");
} else {
Assert.AreSame (expectedEx, ex.InnerException, "TestRaiseContractFailedEventUnwind() wrong inner exception type");
}
}
});
}
/// <summary>
/// When the ContractFailed event throws an exception, then it becomes the inner exception of the
/// ContractException. Except if an exception is passed in to the call, then that exception is put
/// in the InnerException.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractFailedEventThrows ()
{
Contract.ContractFailed += (sender, e) => {
throw new InvalidOperationException ();
};
this.CheckAllKinds ((expected, expectedEx, fnTest) => {
try {
fnTest ();
Assert.Fail ("TestRaiseContractFailedEventThrows() exception not thrown");
} catch (Exception ex) {
Assert.IsInstanceOfType (base.ContractExceptionType, ex, "TestRaiseContractFailedEventThrows() wrong exception type");
Type expectedInnerExceptionType = expectedEx == null ? typeof (InvalidOperationException) : expectedEx.GetType ();
Assert.IsInstanceOfType (expectedInnerExceptionType, ex.InnerException, "TestRaiseContractFailedEventThrows() wrong inner exception type");
}
});
}
/// <summary>
/// Both event handlers should be called, constraint is not handled.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractMultipleHandlers1 ()
{
bool visited1, visited2;
Contract.ContractFailed += (sender, e) => {
visited1 = true;
};
Contract.ContractFailed += (sender, e) => {
visited2 = true;
};
this.CheckAllKinds ((expected, ex, fnTest) => {
visited1 = visited2 = false;
string msg = fnTest ();
Assert.AreEqual (expected, msg, "TestRaiseContractMultipleHandlers1() msg not as expected");
Assert.IsTrue (visited1, "TestRaiseContractMultipleHandlers1() handler 1 not visited");
Assert.IsTrue (visited2, "TestRaiseContractMultipleHandlers1() handler 2 not visited");
});
}
/// <summary>
/// Both event handlers should be called. SetUnwind() takes precedent over SetHandled().
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractMultipleHandlers2 ()
{
bool visited1, visited2;
Contract.ContractFailed += (sender, e) => {
visited1 = true;
e.SetHandled ();
};
Contract.ContractFailed += (sender, e) => {
visited2 = true;
e.SetUnwind ();
};
this.CheckAllKinds ((expected, expectedEx, fnTest) => {
visited1 = visited2 = false;
try {
fnTest ();
Assert.Fail ("TestRaiseContractMultipleHandlers2() exception not thrown");
} catch (Exception ex) {
Assert.IsInstanceOfType (base.ContractExceptionType, ex, "TestRaiseContractMultipleHandlers2() wrong exception type");
if (expectedEx == null) {
Assert.IsNull (ex.InnerException, "TestRaiseContractMultipleHandlers2() inner exception not null");
} else {
Assert.AreSame (expectedEx, ex.InnerException, "TestRaiseContractMultipleHandlers2() wrong inner exception");
}
Assert.IsTrue (visited1, "TestRaiseContractMultipleHandlers2() handler 1 not visited");
Assert.IsTrue (visited2, "TestRaiseContractMultipleHandlers2() handler 2 not visited");
}
});
}
/// <summary>
/// Both event handlers should be called. The exceptions are treated as calls to SetUnwind(), with
/// the exception being put in the InnerException.
/// </summary>
[Test, RunAgainstReference]
public void TestRaiseContractMultipleHandlers3 ()
{
bool visited1, visited2;
Contract.ContractFailed += (sender, e) => {
visited1 = true;
throw new InvalidOperationException ();
};
Contract.ContractFailed += (sender, e) => {
visited2 = true;
throw new InvalidOperationException ();
};
this.CheckAllKinds ((expected, expectedEx, fnTest) => {
visited1 = visited2 = false;
try {
fnTest ();
Assert.Fail ("TestRaiseContractMultipleHandlers3() failed to throw exception");
} catch (Exception ex) {
Type expectedInnerExceptionType = expectedEx == null ? typeof (InvalidOperationException) : expectedEx.GetType ();
Assert.IsInstanceOfType (base.ContractExceptionType, ex, "TestRaiseContractMultipleHandlers3() wrong exception type");
Assert.IsInstanceOfType (expectedInnerExceptionType, ex.InnerException, "TestRaiseContractMultipleHandlers3() wrong inner exception type");
Assert.IsTrue (visited1, "TestRaiseContractMultipleHandlers3() handler 1 not visited");
Assert.IsTrue (visited2, "TestRaiseContractMultipleHandlers3() handler 2 not visited");
}
});
}
/// <summary>
/// Contract.TriggerFailure() triggers the assert. Check that the assert is triggered, with the correct text.
/// </summary>
[Test]
// [Ignore ("This causes NUnit crash on .NET 4.0")]
public void TestTriggerFailure ()
{
try {
ContractHelper.TriggerFailure (ContractFailureKind.Assert, "Display", null, "Condition", null);
Assert.Fail ("TestTriggerFailure() failed to throw exception");
} catch (Exception ex) {
Assert.AreEqual ("Display", ex.Message, "TestTriggerFailure() wrong message");
}
}
}
}
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