public virtual void TestNullTPCs()
{
int numObjects = Random.Next(4) + 3; // between [3, 6]
ITwoPhaseCommit[] tpcs = new ITwoPhaseCommit[numObjects];
bool setNull = false;
for (int i = 0; i < tpcs.Length; i++)
{
bool isNull = Random.NextDouble() < 0.3;
if (isNull)
{
setNull = true;
tpcs[i] = null;
}
else
{
tpcs[i] = new TwoPhaseCommitImpl(false, false, false);
}
}
if (!setNull)
{
// none of the TPCs were picked to be null, pick one at random
int idx = Random.Next(numObjects);
tpcs[idx] = null;
}
// following call would fail if TPCTool won't handle null TPCs properly
TwoPhaseCommitTool.Execute(tpcs);
}
public virtual void TestRollback()
{
// tests that rollback is called if failure occurs at any stage
int numObjects = Random().Next(8) + 3; // between [3, 10]
TwoPhaseCommitImpl[] objects = new TwoPhaseCommitImpl[numObjects];
for (int i = 0; i < objects.Length; i++)
{
bool failOnPrepare = Random().NextBoolean();
// we should not hit failures on commit usually
bool failOnCommit = Random().NextDouble() < 0.05;
bool railOnRollback = Random().NextBoolean();
objects[i] = new TwoPhaseCommitImpl(failOnPrepare, failOnCommit, railOnRollback);
}
bool anyFailure = false;
try
{
TwoPhaseCommitTool.Execute(objects);
}
catch (Exception t)
{
anyFailure = true;
}
if (anyFailure)
{
// if any failure happened, ensure that rollback was called on all.
foreach (TwoPhaseCommitImpl tpc in objects)
{
Assert.IsTrue(tpc.RollbackCalled, "rollback was not called while a failure occurred during the 2-phase commit");
}
}
}
public virtual void TestPrepareThenCommit()
{
// tests that prepareCommit() is called on all objects before commit()
TwoPhaseCommitImpl[] objects = new TwoPhaseCommitImpl[2];
for (int i = 0; i < objects.Length; i++)
{
objects[i] = new TwoPhaseCommitImpl(false, false, false);
}
// following call will fail if commit() is called before all prepare() were
TwoPhaseCommitTool.Execute(objects);
}