1 files changed, 40 insertions, 0 deletions
diff --git a/devtools/client/jsonview/test/browser_jsonview_iframes_ignored.js b/devtools/client/jsonview/test/browser_jsonview_iframes_ignored.js
new file mode 100644
index 0000000000..193076b604
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_iframes_ignored.js
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "doc_with_json_in_iframe.html";
+
+add_task(async function () {
+  info("Test JSON view is disabled for iframes");
+
+  await addTab(TEST_JSON_URL);
+
+  // Wait for JSONView to have a chance to load.
+  // As we expect it to not load, we can't listen to any particular event.
+  await wait(1000);
+
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
+    const frameWin = content.frames[0];
+    ok(
+      !frameWin.wrappedJSObject.JSONView,
+      "JSONView object isn't instantiated in the iframe"
+    );
+    is(
+      frameWin.document.contentType,
+      "application/json",
+      "The mime type is json and not jsonview one"
+    );
+    // When JSON file is displayed as-is, it is within a made up HTML document
+    // where the JSON text is put as child text element of a <pre> element.
+    ok(
+      frameWin.document.querySelector("pre"),
+      "There is a <pre> element in plain text html document"
+    );
+    // That made up HTML doesn't include any <div> element.
+    ok(
+      !frameWin.document.querySelector("div"),
+      "But there is no <div> coming from JSONView"
+    );
+  });
+});