1 files changed, 19 insertions, 0 deletions
diff --git a/servo/tests/unit/style/parsing/supports.rs b/servo/tests/unit/style/parsing/supports.rs
new file mode 100644
index 0000000000..f54ee48bab
--- /dev/null
+++ b/servo/tests/unit/style/parsing/supports.rs
@@ -0,0 +1,19 @@
+/* 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 cssparser::{Parser, ParserInput};
+use style::stylesheets::supports_rule::SupportsCondition;
+use style_traits::ToCss;
+
+#[test]
+fn test_supports_condition() {
+    assert_roundtrip!(SupportsCondition::parse, "(margin: 1px)");
+    assert_roundtrip!(SupportsCondition::parse, "not (--be: to be)");
+    assert_roundtrip!(
+        SupportsCondition::parse,
+        "(color: blue) and future-extension(4)"
+    );
+    assert_roundtrip!(SupportsCondition::parse, "future-\\1 extension(4)");
+    assert_roundtrip!(SupportsCondition::parse, "((test))");
+}