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style: Add some parsing and serialization tests for @layer

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This uncovers some serialization bugs, and some missing null-checks
given the statement layer doesn't have a rule list.

Differential Revision: https://phabricator.services.mozilla.com/D125176
This commit is contained in:
Emilio Cobos Álvarez 2023-05-27 07:20:11 +02:00 • committed by Oriol Brufau
parent 35bf5f0b09
commit 5fe148d5f1
1 changed files with 5 additions and 3 deletions
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8
components/style/stylesheets/layer_rule.rs
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@ -234,7 +234,7 @@ impl ToCssWithGuard for LayerRule {
guard: &SharedRwLockReadGuard,
dest: &mut crate::str::CssStringWriter,
) -> fmt::Result {
dest.write_str("@layer ")?;
dest.write_str("@layer")?;
match self.kind {
LayerRuleKind::Block {
ref name,
@ -242,8 +242,8 @@ impl ToCssWithGuard for LayerRule {
ref is_anonymous,
} => {
if !*is_anonymous {
name.to_css(&mut CssWriter::new(dest))?;
dest.write_char(' ')?;
name.to_css(&mut CssWriter::new(dest))?;
}
rules.read_with(guard).to_css_block(guard, dest)
},
@ -251,7 +251,9 @@ impl ToCssWithGuard for LayerRule {
let mut writer = CssWriter::new(dest);
let mut first = true;
for name in &**names {
if !first {
if first {
writer.write_char(' ')?;
} else {
writer.write_str(", ")?;
}
first = false;