servo/tests/unit/stylo/sanity_checks.rs

53 lines
1.5 KiB
Rust

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Different static asserts that ensure the build does what it's expected to.
//!
//! TODO: maybe cfg(test) this?
#![allow(unused_imports)]
use std::mem;
macro_rules! check_enum_value {
($a:expr, $b:expr) => {
unsafe {
mem::transmute::<[u32; $a as usize],
[u32; $b as usize]>([0; $a as usize]);
}
}
}
// NB: It's a shame we can't do this statically with bitflags, but no
// const-fn and no other way to access the numerical value :-(
macro_rules! check_enum_value_non_static {
($a:expr, $b:expr) => {
assert_eq!($a.0 as usize, $b as usize);
}
}
// Note that we can't call each_pseudo_element, parse_pseudo_element, or
// similar, because we'd need the foreign atom symbols to link.
#[test]
fn assert_basic_pseudo_elements() {
let saw_before;
let saw_after;
macro_rules! pseudo_element {
(":before", $atom:expr, false) => {
saw_before = true;
};
(":after", $atom:expr, false) => {
saw_after = true;
};
($pseudo_str_with_colon:expr, $atom:expr, $is_anon_box:expr) => {
// Do nothing
};
}
include!("../../../components/style/gecko/generated/pseudo_element_helper.rs");
assert!(saw_before);
assert!(saw_after);
}