public static void ExpectComException(ExceptionableAction action, params HRESULT[] expectedErrorCodes)
{
// Throw the ArgumentException if action is null. Don't want this to get caught in our try block.
Verify.IsNotNull(action, "action");
foreach (HRESULT expectedErrorCode in expectedErrorCodes)
{
Assert.IsFalse(expectedErrorCode.Succeeded);
}
try
{
action();
}
catch (COMException e)
{
// Only catch this if it maps to the expected HRESULT.
foreach (HRESULT expectedErrorCode in expectedErrorCodes)
{
if (expectedErrorCode.Equals(e))
{
return;
}
}
// Caught the expected exception type.
// If code past the catch block gets executed then the action didn't throw.
throw;
}
throw new Exception("Expected a COMException to be thrown but the operation completed without raising one.");
}
public static void ExpectException <TException>(ExceptionableAction action, bool supportSubclasses) where TException : Exception
{
// Throw the ArgumentException if action is null. Don't want this to get caught in our try block.
try
{
action();
}
catch (TException e)
{
// If the caller specified that they want exactly the TException type thrown then don't accept derived exceptions.
if (!supportSubclasses && (e.GetType() != typeof(TException)))
{
throw;
}
// Caught the expected exception type.
// If code past the catch block gets executed then the action didn't throw.
return;
}
throw new Exception(
string.Format("Expected an exception of type {0}{1} to be thrown but the operation completed without raising one.",
typeof(TException).ToString(),
supportSubclasses ? " (or a derived exception type)" : ""));
}
public static void ExpectException <TException>(ExceptionableAction action) where TException : Exception
{
ExpectException <TException>(action, true);
}
