1 files changed, 16 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_mime_css_blocked.js b/devtools/client/webconsole/test/browser/browser_webconsole_mime_css_blocked.js
new file mode 100644
index 0000000000..51fa43082c
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_mime_css_blocked.js
@@ -0,0 +1,16 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that non-CSS parser errors get displayed by default.
+
+"use strict";
+
+const CSS_URI = "data:text/bogus,foo";
+const TEST_URI = `data:text/html,<!DOCTYPE html><link rel="stylesheet" href="${CSS_URI}">`;
+
+add_task(async function () {
+  const hud = await openNewTabAndConsole(TEST_URI);
+  const MSG = `The stylesheet ${CSS_URI} was not loaded because its MIME type, “text/bogus”, is not “text/css”`;
+  await waitFor(() => findErrorMessage(hud, MSG), "", 100);
+  ok(true, "MIME type error displayed");
+});