replace `expectException` with custom `assertTrue(didExceptionHappen(...))`

[simonLeary42]

function didExceptionHappen($func, $exceptionType)
{
    try {
        $func();
        return false;
    } catch (Throwable $e) {
        if ($e instanceof $exceptionType) {
            return true;
        }
        throw $e;
    }
}

PHPunit's expect exception is not useful:

• https://stackoverflow.com/questions/14561908/phpunit-doesnt-continue-test-after-expecting-an-exception
• bad output from successful expectException followed by another exception in try/finally sebastianbergmann/phpunit#6187