/** Returns a set of tests to run for varied log configurations. */
protected Object[] testsFor(Class<? extends LogTest> testClass) throws Throwable {
List<Object> tests = new ArrayList<>();
for (int i = 1; i < 10; i++) {
LogTest test = testClass.newInstance();
test.entriesPerSegment = i;
test.entryPadding = i / 3;
tests.add(test);
}
return tests.toArray(new Object[tests.size()]);
}
// Loads the parameters from file if the file has changed.
// Returns the parameters or null if the file does not exist.
private static <T extends ConfProvider> T loadParameters(
Path path, Class<T> clazz, T existingInstance) throws Exception {
T params = existingInstance != null ? existingInstance : (T) clazz.newInstance();
if (params.hasChanged()) {
log.trace("Loading {} from {}", clazz.getSimpleName(), path);
params.load(path.toString());
}
return params;
}