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LibTest: Add more numeric generators

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Rename unsigned_int generator to number_u32.
Add generators:
- number_u64
- number_f64
- percentage
This commit is contained in:
Martin Janiczek 2023-12-30 16:23:59 +01:00 • committed by Andrew Kaster
parent dd53f64d2f
commit d52ffcd830
15 changed files with 312 additions and 133 deletions
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18
Userland/Libraries/LibTest/Randomized/Shrink.h
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@ -77,15 +77,15 @@ ShrinkResult keep_if_better(RandomRun const& new_run, RandomRun const& current_b
}
template<typename Fn, typename UpdateRunFn>
ShrinkResult binary_shrink(u32 orig_low, u32 orig_high, UpdateRunFn update_run, RandomRun const& orig_run, Fn const& test_function)
ShrinkResult binary_shrink(u64 orig_low, u64 orig_high, UpdateRunFn update_run, RandomRun const& orig_run, Fn const& test_function)
{
if (orig_low == orig_high) {
return no_improvement(orig_run);
}
RandomRun current_best = orig_run;
u32 low = orig_low;
u32 high = orig_high;
u64 low = orig_low;
u64 high = orig_high;
// Let's try with the best case (low = most shrunk) first
RandomRun run_with_low = update_run(low, current_best);
@ -111,7 +111,7 @@ ShrinkResult binary_shrink(u32 orig_low, u32 orig_high, UpdateRunFn update_run,
// pass/reject/overrun.
ShrinkResult result = after_low;
while (low + 1 < high) {
u32 mid = low + (high - low) / 2;
u64 mid = low + (high - low) / 2;
RandomRun run_with_mid = update_run(mid, current_best);
ShrinkResult after_mid = keep_if_better(run_with_mid, current_best, test_function);
switch (after_mid.was_improvement) {
@ -194,7 +194,7 @@ ShrinkResult shrink_delete(DeleteChunkAndMaybeDecPrevious command, RandomRun con
template<typename Fn>
ShrinkResult shrink_minimize(MinimizeChoice command, RandomRun const& run, Fn const& test_function)
{
u32 value = run[command.index];
u64 value = run[command.index];
// We can't minimize 0! Already the best possible case.
if (value == 0) {
@ -204,7 +204,7 @@ ShrinkResult shrink_minimize(MinimizeChoice command, RandomRun const& run, Fn co
return binary_shrink(
0,
value,
[&](u32 new_value, RandomRun const& run) {
[&](u64 new_value, RandomRun const& run) {
RandomRun copied_run = run;
copied_run[command.index] = new_value;
return copied_run;
@ -236,12 +236,12 @@ ShrinkResult shrink_redistribute(RedistributeChoicesAndMaybeInc command, RandomR
ShrinkResult after_swap = keep_if_better(run_after_swap, current_best, test_function);
current_best = after_swap.run;
u32 constant_sum = current_best[command.right_index] + current_best[command.left_index];
u64 constant_sum = current_best[command.right_index] + current_best[command.left_index];
ShrinkResult after_redistribute = binary_shrink(
0,
current_best[command.left_index],
[&](u32 new_value, RandomRun const& run) {
[&](u64 new_value, RandomRun const& run) {
RandomRun copied_run = run;
copied_run[command.left_index] = new_value;
copied_run[command.right_index] = constant_sum - new_value;
@ -275,7 +275,7 @@ ShrinkResult shrink_redistribute(RedistributeChoicesAndMaybeInc command, RandomR
ShrinkResult after_inc_redistribute = binary_shrink(
0,
current_best[command.left_index],
[&](u32 new_value, RandomRun const& run) {
[&](u64 new_value, RandomRun const& run) {
RandomRun copied_run = run;
copied_run[command.left_index] = new_value;
copied_run[command.right_index] = constant_sum - new_value;