1 files changed, 154 insertions, 0 deletions
diff --git a/servo/tests/unit/style/parsing/image.rs b/servo/tests/unit/style/parsing/image.rs
new file mode 100644
index 0000000000..33ccb88cb0
--- /dev/null
+++ b/servo/tests/unit/style/parsing/image.rs
@@ -0,0 +1,154 @@
+/* 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 style::parser::Parse;
+use style::values::specified::image::*;
+use style_traits::ToCss;
+
+#[test]
+fn test_linear_gradient() {
+    // Parsing from the right
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(to left, red, green)");
+
+    // Parsing from the left
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(to right, red, green)");
+
+    // Parsing with two values for <side-or-corner>
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(to right top, red, green)");
+
+    // Parsing with <angle>
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(45deg, red, green)");
+
+    // Parsing with more than two entries in <color-stop-list>
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(red, yellow, green)");
+
+    // Parsing with percentage in the <color-stop-list>
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(red, green, yellow 50%)");
+
+    // Parsing without <angle> and <side-or-corner>
+    assert_roundtrip_with_context!(Image::parse, "linear-gradient(red, green)");
+}
+
+#[test]
+fn test_radial_gradient() {
+    // Parsing with all values
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(circle closest-side at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(ellipse closest-side at 20px 30px, red, green)",
+        "radial-gradient(closest-side at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-side circle at 20px 30px, red, green)",
+        "radial-gradient(circle closest-side at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-side ellipse at 20px 30px, red, green)",
+        "radial-gradient(closest-side at 20px 30px, red, green)"
+    );
+
+    // Parsing with <shape-keyword> and <size> reversed
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-side circle at 20px 30px, red, green)",
+        "radial-gradient(circle closest-side at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-corner ellipse at 20px 30px, red, green)",
+        "radial-gradient(closest-corner at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(30px circle, red, green)",
+        "radial-gradient(30px at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(30px 40px ellipse, red, green)",
+        "radial-gradient(30px 40px at center center, red, green)"
+    );
+
+    // Parsing without <size>
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(circle, red, green)",
+        "radial-gradient(circle at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(ellipse, red, green)",
+        "radial-gradient(at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(circle at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(ellipse at 20px 30px, red, green)",
+        "radial-gradient(at 20px 30px, red, green)"
+    );
+
+    // Parsing without <shape-keyword>
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(20px at 20px 30px, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(20px 30px at left center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-side at center, red, green)",
+        "radial-gradient(closest-side at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(20px, red, green)",
+        "radial-gradient(20px at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(20px 30px, red, green)",
+        "radial-gradient(20px 30px at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(closest-side, red, green)",
+        "radial-gradient(closest-side at center center, red, green)"
+    );
+
+    // Parsing without <shape-keyword> and <size>
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(at center, red, green)",
+        "radial-gradient(at center center, red, green)"
+    );
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(at center bottom, red, green)"
+    );
+    assert_roundtrip_with_context!(Image::parse, "radial-gradient(at 40px 50px, red, green)");
+
+    // Parsing with just color stops
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "radial-gradient(red, green)",
+        "radial-gradient(at center center, red, green)"
+    );
+
+    // Parsing repeating radial gradient
+    assert_roundtrip_with_context!(
+        Image::parse,
+        "repeating-radial-gradient(red, green)",
+        "repeating-radial-gradient(at center center, red, green)"
+    );
+}