zig/test/cases/try.zig
2018-05-29 04:23:38 -04:00

44 lines
911 B
Zig

const assert = @import("std").debug.assert;
test "try on error union" {
tryOnErrorUnionImpl();
comptime tryOnErrorUnionImpl();
}
fn tryOnErrorUnionImpl() void {
const x = if (returnsTen()) |val| val + 1 else |err| switch (err) {
error.ItBroke, error.NoMem => 1,
error.CrappedOut => i32(2),
else => unreachable,
};
assert(x == 11);
}
fn returnsTen() error!i32 {
return 10;
}
test "try without vars" {
const result1 = if (failIfTrue(true)) 1 else |_| i32(2);
assert(result1 == 2);
const result2 = if (failIfTrue(false)) 1 else |_| i32(2);
assert(result2 == 1);
}
fn failIfTrue(ok: bool) error!void {
if (ok) {
return error.ItBroke;
} else {
return;
}
}
test "try then not executed with assignment" {
if (failIfTrue(true)) {
unreachable;
} else |err| {
assert(err == error.ItBroke);
}
}