1 files changed, 45 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..2c960bbf45
--- /dev/null
+++ b/docshell/test/navigation/browser_bug1757458.js
@@ -0,0 +1,45 @@
+/* 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.loadURI(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'."
+      );
+    });
+  });
+});