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improve behavior test coverage for overflow arithmetic

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This commit is contained in:
Andrew Kelley 2021-11-29 23:21:07 -07:00
parent 0a9b4d092f
commit 173d56213b
1 changed files with 22 additions and 3 deletions
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25
test/behavior/math_stage1.zig
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@ -9,26 +9,45 @@ const mem = std.mem;
test "@addWithOverflow" {
var result: u8 = undefined;
try expect(@addWithOverflow(u8, 250, 100, &result));
try expect(result == 94);
try expect(!@addWithOverflow(u8, 100, 150, &result));
try expect(result == 250);
}
// TODO test mulWithOverflow
// TODO test subWithOverflow
test "@mulWithOverflow" {
var result: u8 = undefined;
try expect(@mulWithOverflow(u8, 86, 3, &result));
try expect(result == 2);
try expect(!@mulWithOverflow(u8, 85, 3, &result));
try expect(result == 255);
}
test "@subWithOverflow" {
var result: u8 = undefined;
try expect(@subWithOverflow(u8, 1, 2, &result));
try expect(result == 255);
try expect(!@subWithOverflow(u8, 1, 1, &result));
try expect(result == 0);
}
test "@shlWithOverflow" {
var result: u16 = undefined;
try expect(@shlWithOverflow(u16, 0b0010111111111111, 3, &result));
try expect(result == 0b0111111111111000);
try expect(!@shlWithOverflow(u16, 0b0010111111111111, 2, &result));
try expect(result == 0b1011111111111100);
}
test "@*WithOverflow with u0 values" {
test "overflow arithmetic with u0 values" {
var result: u0 = undefined;
try expect(!@addWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@subWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@mulWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@shlWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
}
test "@clz vectors" {