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69 lines
2.3 KiB
Rust
69 lines
2.3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Different static asserts that ensure the build does what it's expected to.
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//!
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//! TODO: maybe cfg(test) this?
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#![allow(unused_imports)]
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use std::mem;
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macro_rules! check_enum_value {
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($a:expr, $b:expr) => {
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unsafe {
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mem::transmute::<[u32; $a as usize],
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[u32; $b as usize]>([0; $a as usize]);
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}
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}
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}
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// NB: It's a shame we can't do this statically with bitflags, but no
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// const-fn and no other way to access the numerical value :-(
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macro_rules! check_enum_value_non_static {
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($a:expr, $b:expr) => {
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assert_eq!($a.0 as usize, $b as usize);
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}
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}
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#[test]
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fn assert_restyle_hints_match() {
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use style::restyle_hints::*; // For flags
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use style::gecko_bindings::structs;
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check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_Self, RESTYLE_SELF.bits());
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// XXX This for Servo actually means something like an hypothetical
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// Restyle_AllDescendants (but without running selector matching on the
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// element). ServoRestyleManager interprets it like that, but in practice we
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// should align the behavior with Gecko adding a new restyle hint, maybe?
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//
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=1291786
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check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_SomeDescendants, RESTYLE_DESCENDANTS.bits());
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check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_LaterSiblings, RESTYLE_LATER_SIBLINGS.bits());
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}
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// Note that we can't call each_pseudo_element, parse_pseudo_element, or
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// similar, because we'd need the foreign atom symbols to link.
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#[test]
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fn assert_basic_pseudo_elements() {
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let mut saw_before = false;
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let mut saw_after = false;
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macro_rules! pseudo_element {
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(":before", $atom:expr, false) => {
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saw_before = true;
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};
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(":after", $atom:expr, false) => {
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saw_after = true;
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};
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($pseudo_str_with_colon:expr, $atom:expr, $is_anon_box:expr) => {
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// Do nothing
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};
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}
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include!("../../../components/style/gecko/generated/gecko_pseudo_element_helper.rs");
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assert!(saw_before);
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assert!(saw_after);
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}
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