1 files changed, 59 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_findbar_hiddenframes.js b/toolkit/content/tests/browser/browser_findbar_hiddenframes.js
new file mode 100644
index 0000000000..f0f4131464
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_findbar_hiddenframes.js
@@ -0,0 +1,59 @@
+const TEST_PAGE = "https://example.com/document-builder.sjs?html=";
+
+let content =
+  "<html><body><iframe id='a' src='data:text/html,This is the first page'></iframe><iframe id='b' src='data:text/html,That is another page'></iframe></body></html>";
+
+async function doAndCheckFind(bc, text) {
+  await promiseFindFinished(gBrowser, text, false);
+
+  let foundText = await SpecialPowers.spawn(bc, [], () => {
+    return content.getSelection().toString();
+  });
+  is(foundText, text, text + " is found");
+}
+
+// This test verifies that find continues to work when a find begins and the frame
+// is hidden during the next find step.
+add_task(async function test_frame() {
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    TEST_PAGE + content
+  );
+  let browser = gBrowser.getBrowserForTab(tab);
+
+  let findbar = await gBrowser.getFindBar();
+
+  await doAndCheckFind(browser.browsingContext.children[0], "This");
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("a").style.display = "none";
+    content.document.getElementById("a").getBoundingClientRect(); // flush
+  });
+
+  await doAndCheckFind(browser.browsingContext.children[1], "another");
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("a").style.display = "";
+    content.document.getElementById("a").getBoundingClientRect();
+  });
+
+  await doAndCheckFind(browser.browsingContext.children[0], "first");
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("a").style.visibility = "hidden";
+    content.document.getElementById("a").getBoundingClientRect();
+  });
+
+  await doAndCheckFind(browser.browsingContext.children[1], "That");
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("a").style.visibility = "";
+    content.document.getElementById("a").getBoundingClientRect();
+  });
+
+  await doAndCheckFind(browser.browsingContext.children[0], "This");
+
+  await closeFindbarAndWait(findbar);
+
+  gBrowser.removeTab(tab);
+});