WineHQ
WineHQ

5.8. Handling platform issues

Some checks may be written before they pass successfully in Wine. Without some mechanism, such checks would potentially generate hundred of known failures for months each time the tests are being run. This would make it hard to detect new failures caused by a regression. or to detect that a patch fixed a long standing issue.

Thus the Wine testing framework has the concept of platforms and groups of checks can be declared as expected to fail on some of them. In the most common case, one would declare a group of tests as expected to fail in Wine. To do so, use the following construct:

todo_wine {
    SetLastError( 0xdeadbeef );
    ok( GlobalAddAtomA(0) == 0 && GetLastError() == 0xdeadbeef, "failed to add atom 0\n" );
}
On Windows the above check would be performed normally, but on Wine it would be expected to fail, and not cause the failure of the whole test. However. If that check were to succeed in Wine, it would cause the test to fail, thus making it easy to detect when something has changed that fixes a bug. Also note that todo checks are accounted separately from regular checks so that the testing statistics remain meaningful.

When writing tests you will also encounter differences between Windows 9x and Windows NT platforms. Such differences should be treated differently from the platform issues mentioned above. In particular you should remember that the goal of Wine is not to be a clone of any specific Windows version but to run Windows applications on Unix.

So, if an API returns a different error code on Windows 9x and Windows NT, your check should just verify that Wine returns one or the other:

ok ( GetLastError() == WIN9X_ERROR || GetLastError() == NT_ERROR, ...);

If an API is only present on some Windows platforms, then use LoadLibrary and GetProcAddress to check if it is implemented and invoke it. Remember, tests must run on all Windows platforms. Similarly, conformance tests should not try to correlate the Windows version returned by GetVersion with whether given APIs are implemented or not. Again, the goal of Wine is to run Windows applications (which do not do such checks), and not be a clone of a specific Windows version.