M-Labs
/
compiler-builtins-zynq
8
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

qc: bias towards generation of edge cases

master
Jorge Aparicio 2016-08-20 22:17:50 -05:00
parent 8603e64554
commit fc0cdeb7f1
1 changed files with 28 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/qc.rs
View File

@ -20,7 +20,18 @@ macro_rules! arbitrary {
fn arbitrary<G>(g: &mut G) -> $TY
where G: Gen
{
$TY(g.gen())
// NOTE Generate edge cases with a 10% chance
let t = if g.gen_weighted_bool(10) {
*g.choose(&[
$ty::min_value(),
0,
$ty::max_value(),
]).unwrap()
} else {
g.gen()
};
$TY(t)
}
fn shrink(&self) -> Box<Iterator<Item=$TY>> {
@ -76,13 +87,23 @@ macro_rules! arbitrary_large {
fn arbitrary<G>(g: &mut G) -> $TY
where G: Gen
{
if g.gen() {
$TY($ty::from_parts(g.gen(), g.gen()))
} else if g.gen() {
$TY($ty::from_parts(0, g.gen()))
// NOTE Generate edge cases with a 10% chance
let t = if g.gen_weighted_bool(10) {
*g.choose(&[
$ty::min_value(),
0,
$ty::max_value(),
]).unwrap()
} else {
$TY($ty::from_parts(g.gen(), 0))
}
match g.gen_range(0, 3) {
0 => $ty::from_parts(g.gen(), g.gen()),
1 => $ty::from_parts(0, g.gen()),
2 => $ty::from_parts(g.gen(), 0),
_ => unreachable!(),
}
};
$TY(t)
}
fn shrink(&self) -> Box<Iterator<Item=$TY>> {