1 files changed, 88 insertions, 0 deletions
diff --git a/servo/tests/unit/style/attr.rs b/servo/tests/unit/style/attr.rs
new file mode 100644
index 0000000000..b3164c4911
--- /dev/null
+++ b/servo/tests/unit/style/attr.rs
@@ -0,0 +1,88 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use app_units::Au;
+use style::attr::{AttrValue, LengthPercentageOrAuto, parse_length};
+use style::values::computed::{CalcLengthPercentage, Percentage};
+
+#[test]
+fn test_length_calc() {
+    let calc = CalcLengthPercentage::new(Au(10).into(), Some(Percentage(0.2)));
+    assert_eq!(calc.to_used_value(Some(Au(10))), Some(Au(12)));
+    assert_eq!(calc.to_used_value(Some(Au(0))), Some(Au(10)));
+    assert_eq!(calc.to_used_value(None), None);
+
+    let calc = CalcLengthPercentage::new(Au(10).into(), None);
+    assert_eq!(calc.to_used_value(Some(Au(0))), Some(Au(10)));
+    assert_eq!(calc.to_used_value(None), Some(Au(10)));
+}
+
+#[test]
+fn test_parse_double() {
+    let value = String::from("432.5e2");
+    match AttrValue::from_double(value, 0.0) {
+        AttrValue::Double(_, num) => assert_eq!(num, 43250f64),
+        _ => panic!("expected a double value")
+    }
+}
+
+#[test]
+fn test_parse_double_negative_prefix() {
+    let value = String::from("-5.6");
+    match AttrValue::from_double(value, 0.0) {
+        AttrValue::Double(_, num) => assert_eq!(num, -5.6f64),
+        _ => panic!("expected a double value")
+    }
+}
+
+#[test]
+fn test_parse_double_positive_prefix() {
+    let value = String::from("+5.6");
+    match AttrValue::from_double(value, 0.0) {
+        AttrValue::Double(_, num) => assert_eq!(num, 5.6f64),
+        _ => panic!("expected a double value")
+    }
+}
+
+#[test]
+fn test_from_limited_i32_should_be_default_when_less_than_0() {
+    let value = String::from("-1");
+    match AttrValue::from_limited_i32(value, 0) {
+        AttrValue::Int(_, 0) => (),
+        _ => panic!("expected an IndexSize error")
+    }
+}
+
+#[test]
+fn test_from_limited_i32_should_parse_a_uint_when_value_is_0_or_greater() {
+    match AttrValue::from_limited_i32(String::from("1"), 0) {
+        AttrValue::Int(_, 1) => (),
+        _ => panic!("expected an successful parsing")
+    }
+}
+
+#[test]
+fn test_from_limited_i32_should_keep_parsed_value_when_not_an_int() {
+    match AttrValue::from_limited_i32(String::from("parsed-value"), 0) {
+        AttrValue::Int(p, 0) => {
+            assert_eq!(p, String::from("parsed-value"))
+        },
+        _ => panic!("expected an successful parsing")
+    }
+}
+
+#[test]
+pub fn test_parse_length() {
+    fn check(input: &str, expected: LengthPercentageOrAuto) {
+        let parsed = parse_length(input);
+        assert_eq!(parsed, expected);
+    }
+
+    check("0", LengthPercentageOrAuto::Length(Au::from_px(0)));
+    check("0.000%", LengthPercentageOrAuto::Percentage(0.0));
+    check("+5.82%", LengthPercentageOrAuto::Percentage(0.0582));
+    check("5.82", LengthPercentageOrAuto::Length(Au::from_f64_px(5.82)));
+    check("invalid", LengthPercentageOrAuto::Auto);
+    check("12 followed by invalid", LengthPercentageOrAuto::Length(Au::from_px(12)));
+}