1 files changed, 47 insertions, 0 deletions
diff --git a/layout/style/test/browser_sourcemap_comment.js b/layout/style/test/browser_sourcemap_comment.js
new file mode 100644
index 0000000000..e0bbff8de4
--- /dev/null
+++ b/layout/style/test/browser_sourcemap_comment.js
@@ -0,0 +1,47 @@
+add_task(async function () {
+  // Test text and expected results.
+  let test_cases = [
+    ["/*# sourceMappingURL=here*/", "here"],
+    ["/*# sourceMappingURL=here  */", "here"],
+    ["/*@ sourceMappingURL=here*/", "here"],
+    ["/*@ sourceMappingURL=there*/ /*# sourceMappingURL=here*/", "here"],
+    ["/*# sourceMappingURL=here there  */", "here"],
+
+    ["/*# sourceMappingURL=  here  */", ""],
+    ["/*# sourceMappingURL=*/", ""],
+    ["/*# sourceMappingUR=here  */", ""],
+    ["/*! sourceMappingURL=here  */", ""],
+    ["/*# sourceMappingURL = here  */", ""],
+    ["/*   # sourceMappingURL=here   */", ""],
+  ];
+
+  let page = "<!DOCTYPE HTML>\n<html>\n<head>\n";
+  for (let i = 0; i < test_cases.length; ++i) {
+    page += `<style type="text/css"> #x${i} { color: red; }${test_cases[i][0]}</style>\n`;
+  }
+  page += "</head><body>some text</body></html>";
+
+  let uri = "data:text/html;base64," + btoa(page);
+  info(`URI is ${uri}`);
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: uri,
+    },
+    async function (browser) {
+      await SpecialPowers.spawn(browser, [test_cases], function (tests) {
+        for (let i = 0; i < content.document.styleSheets.length; ++i) {
+          let sheet = content.document.styleSheets[i];
+
+          info(`Checking sheet #${i}`);
+          is(
+            sheet.sourceMapURL,
+            tests[i][1],
+            `correct source map for sheet ${i}`
+          );
+        }
+      });
+    }
+  );
+});