Add minify test for printer

Author: devongovett

src/lib.rs

@@ -125,6 +125,11 @@ mod tests {
     assert_eq!(res, expected);
   }
 
+  fn minify_test(source: &str, expected: &str) {
+    let res = compile(source, true);
+    assert_eq!(res, expected);
+  }
+
   #[test]
   pub fn test_border() {
     test(r#"
@@ -327,6 +332,13 @@ mod tests {
       }
     "#
     });
+
+    minify_test(r#"
+      .foo {
+        border: none;
+      }
+    "#, indoc! {".foo{border:0;}"
+    });
   }
 
   #[test]
@@ -659,6 +671,13 @@ mod tests {
       }
     "#
     });
+
+    minify_test(r#"
+      .foo {
+        background-position: center center;
+      }
+    "#, indoc! {".foo{background-position:50% 50%;}"
+    });
   }
 
   #[test]

src/media_query.rs

@@ -1,7 +1,7 @@
 use cssparser::*;
 
 /// A type that encapsulates a media query list.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct MediaList {
     /// The list of media queries.
     pub media_queries: Vec<MediaQuery>,
@@ -51,7 +51,7 @@ impl MediaList {
 }
 
 /// <https://drafts.csswg.org/mediaqueries/#mq-prefix>
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub enum Qualifier {
     /// Hide a media query from legacy UAs:
     /// <https://drafts.csswg.org/mediaqueries/#mq-only>
@@ -78,7 +78,7 @@ impl Qualifier {
 }
 
 /// <http://dev.w3.org/csswg/mediaqueries-3/#media0>
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum MediaType {
     /// A media type that matches every device.
     All,
@@ -102,7 +102,7 @@ impl MediaType {
 /// A [media query][mq].
 ///
 /// [mq]: https://drafts.csswg.org/mediaqueries/
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct MediaQuery {
     /// The qualifier for this query.
     pub qualifier: Option<Qualifier>,

src/parser.rs

@@ -9,7 +9,7 @@ use crate::printer::Printer;
 use crate::values::traits::ToCss;
 use std::fmt::Write;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Selectors;
 
 #[derive(Eq, PartialEq, Clone)]
@@ -325,7 +325,7 @@ impl<'a, 'i> QualifiedRuleParser<'i> for TopLevelRuleParser {
 struct NestedRuleParser {
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct MediaRule {
   query: MediaList,
   rules: Vec<CssRule>
@@ -350,7 +350,7 @@ impl ToCss for MediaRule {
   }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct ImportRule {
   pub url: String,
   pub media: MediaList
@@ -365,7 +365,7 @@ impl ToCss for ImportRule {
   }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct StyleRule {
   pub selectors: SelectorList<Selectors>,
   pub declarations: Vec<Property>
@@ -435,7 +435,7 @@ impl StyleRule {
   }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum CssRule {
   Media(MediaRule),
   Import(ImportRule),

src/properties/custom.rs

@@ -1,6 +1,6 @@
 use cssparser::*;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct CustomProperty {
   pub name: String,
   pub value: String

src/properties/mod.rs

@@ -16,7 +16,7 @@ use super::values::traits::{Parse, ToCss};
 use crate::printer::Printer;
 use std::fmt::Write;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub enum Property {
   BackgroundColor(CssColor),
   BackgroundImage(Vec<Image>),