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Add unit tests for revalidation selectors.

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If these break, our cache may be subtly wrong in certain situations, which may
be hard to detect.

MozReview-Commit-ID: AXG2tpGnQ6k
This commit is contained in:
Bobby Holley 2017-04-26 18:16:10 -07:00
parent 25832b962f
commit 6e413653e7
1 changed files with 106 additions and 1 deletions
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107
tests/unit/style/stylist.rs
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@ -4,15 +4,17 @@
use html5ever_atoms::LocalName;
use selectors::parser::LocalName as LocalNameSelector;
use selectors::parser::Selector;
use servo_atoms::Atom;
use std::sync::Arc;
use style::properties::{PropertyDeclarationBlock, PropertyDeclaration};
use style::properties::{longhands, Importance};
use style::rule_tree::CascadeLevel;
use style::selector_parser::SelectorParser;
use style::selector_parser::{SelectorImpl, SelectorParser};
use style::shared_lock::SharedRwLock;
use style::stylesheets::StyleRule;
use style::stylist::{Rule, SelectorMap};
use style::stylist::needs_revalidation;
use style::thread_state;
/// Helper method to get some Rules from selector strings.
@ -56,6 +58,109 @@ fn get_mock_map(selectors: &[&str]) -> (SelectorMap, SharedRwLock) {
(map, shared_lock)
}
fn parse_selectors(selectors: &[&str]) -> Vec<Selector<SelectorImpl>> {
selectors.iter()
.map(|x| SelectorParser::parse_author_origin_no_namespace(x).unwrap().0
.into_iter()
.nth(0)
.unwrap())
.collect()
}
#[test]
fn test_revalidation_selectors() {
let test = parse_selectors(&[
// Not revalidation selectors.
"div",
"#bar",
"div:not(.foo)",
"div span",
"div > span",
// Attribute selectors.
"div[foo]",
"div:not([foo])",
"div[foo = \"bar\"]",
"div[foo ~= \"bar\"]",
"div[foo |= \"bar\"]",
"div[foo ^= \"bar\"]",
"div[foo $= \"bar\"]",
"div[foo *= \"bar\"]",
"*|div[foo][bar = \"baz\"]",
// Non-state-based pseudo-classes.
"div:empty",
"div:first-child",
"div:last-child",
"div:only-child",
"div:nth-child(2)",
"div:nth-last-child(2)",
"div:nth-of-type(2)",
"div:nth-last-of-type(2)",
"div:first-of-type",
"div:last-of-type",
"div:only-of-type",
// Note: it would be nice to test :moz-any and the various other non-TS
// pseudo classes supported by gecko, but we don't have access to those
// in these unit tests. :-(
// Sibling combinators.
"span + div",
"span ~ div",
// Revalidation selectors that will get sliced.
"td > h1[dir]",
"td > span + h1[dir]",
"table td > span + div ~ h1[dir]",
]).into_iter()
.filter(|s| needs_revalidation(&s))
.map(|s| s.inner.slice_to_first_ancestor_combinator().complex)
.collect::<Vec<_>>();
let reference = parse_selectors(&[
// Attribute selectors.
"div[foo]",
"div:not([foo])",
"div[foo = \"bar\"]",
"div[foo ~= \"bar\"]",
"div[foo |= \"bar\"]",
"div[foo ^= \"bar\"]",
"div[foo $= \"bar\"]",
"div[foo *= \"bar\"]",
"*|div[foo][bar = \"baz\"]",
// Non-state-based pseudo-classes.
"div:empty",
"div:first-child",
"div:last-child",
"div:only-child",
"div:nth-child(2)",
"div:nth-last-child(2)",
"div:nth-of-type(2)",
"div:nth-last-of-type(2)",
"div:first-of-type",
"div:last-of-type",
"div:only-of-type",
// Sibling combinators.
"span + div",
"span ~ div",
// Revalidation selectors that got sliced.
"h1[dir]",
"span + h1[dir]",
"span + div ~ h1[dir]",
]).into_iter()
.map(|s| s.inner.complex)
.collect::<Vec<_>>();
assert_eq!(test.len(), reference.len());
for (t, r) in test.into_iter().zip(reference.into_iter()) {
assert_eq!(t, r)
}
}
#[test]
fn test_rule_ordering_same_specificity() {
let (rules_list, _) = get_mock_rules(&["a.intro", "img.sidebar"]);