1 files changed, 46 insertions, 0 deletions
diff --git a/docshell/test/navigation/browser_bug1757458.js b/docshell/test/navigation/browser_bug1757458.js
new file mode 100644
index 0000000000..cc9504ac1c
--- /dev/null
+++ b/docshell/test/navigation/browser_bug1757458.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function () {
+  let testPage =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "view-source:http://example.com"
+    ) + "redirect_to_blank.sjs";
+
+  let testPage2 = "data:text/html,<div>Second page</div>";
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: testPage },
+    async function (browser) {
+      await ContentTask.spawn(browser, [], async () => {
+        Assert.ok(
+          content.document.getElementById("viewsource").localName == "body",
+          "view-source document's body should have id='viewsource'."
+        );
+        content.document
+          .getElementById("viewsource")
+          .setAttribute("onunload", "/* disable bfcache*/");
+      });
+
+      BrowserTestUtils.loadURIString(browser, testPage2);
+      await BrowserTestUtils.browserLoaded(browser);
+
+      let pageShownPromise = BrowserTestUtils.waitForContentEvent(
+        browser,
+        "pageshow",
+        true
+      );
+      browser.browsingContext.goBack();
+      await pageShownPromise;
+
+      await ContentTask.spawn(browser, [], async () => {
+        Assert.ok(
+          content.document.getElementById("viewsource").localName == "body",
+          "view-source document's body should have id='viewsource'."
+        );
+      });
+    }
+  );
+});