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Auto merge of #18352 - jdm:serialize-fun, r=emilio

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Make serialization match Gecko in a few corner cases

This addresses the testcases from https://bugzilla.mozilla.org/show_bug.cgi?id=1345218. Gecko differs from the specification by doing the following:
* reusing longhands that have previously been serialized in order to serialize shorthands
* immediately breaking out of the shorthand loop for the current property as soon as a shorthand is successfully serialized

https://github.com/w3c/csswg-drafts/issues/1774 is filed to track ways that the standard could be made more clear on these points.

---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [bug 1345218](https://bugzilla.mozilla.org/show_bug.cgi?id=1345218).
- [X] There are tests for these changes

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This commit is contained in:
bors-servo 2017-09-13 10:51:00 -05:00 • committed by GitHub
commit e50341d4a9
3 changed files with 68 additions and 9 deletions
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47
tests/unit/style/properties/serialization.rs
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@ -341,6 +341,53 @@ mod shorthand_serialization {
mod border_shorthands {
use super::*;
#[test]
fn border_top_and_color() {
let mut properties = Vec::new();
properties.push(PropertyDeclaration::BorderTopWidth(BorderSideWidth::Length(Length::from_px(1.))));
properties.push(PropertyDeclaration::BorderTopStyle(BorderStyle::solid));
let c = Color::Numeric {
parsed: RGBA::new(255, 0, 0, 255),
authored: Some("green".to_string().into_boxed_str())
};
properties.push(PropertyDeclaration::BorderTopColor(c));
let c = Color::Numeric {
parsed: RGBA::new(0, 255, 0, 255),
authored: Some("red".to_string().into_boxed_str())
};
properties.push(PropertyDeclaration::BorderTopColor(c.clone()));
properties.push(PropertyDeclaration::BorderBottomColor(c.clone()));
properties.push(PropertyDeclaration::BorderLeftColor(c.clone()));
properties.push(PropertyDeclaration::BorderRightColor(c.clone()));
let serialization = shorthand_properties_to_string(properties);
assert_eq!(serialization, "border-top: 1px solid red; border-color: red;");
}
#[test]
fn border_color_and_top() {
let mut properties = Vec::new();
let c = Color::Numeric {
parsed: RGBA::new(0, 255, 0, 255),
authored: Some("red".to_string().into_boxed_str())
};
properties.push(PropertyDeclaration::BorderTopColor(c.clone()));
properties.push(PropertyDeclaration::BorderBottomColor(c.clone()));
properties.push(PropertyDeclaration::BorderLeftColor(c.clone()));
properties.push(PropertyDeclaration::BorderRightColor(c.clone()));
properties.push(PropertyDeclaration::BorderTopWidth(BorderSideWidth::Length(Length::from_px(1.))));
properties.push(PropertyDeclaration::BorderTopStyle(BorderStyle::solid));
let c = Color::Numeric {
parsed: RGBA::new(255, 0, 0, 255),
authored: Some("green".to_string().into_boxed_str())
};
properties.push(PropertyDeclaration::BorderTopColor(c));
let serialization = shorthand_properties_to_string(properties);
assert_eq!(serialization, "border-color: green red red; border-top: 1px solid green;");
}
// we can use border-top as a base to test out the different combinations
// but afterwards, we only need to to one test per "directional border shorthand"