1 files changed, 48 insertions, 0 deletions
diff --git a/docshell/test/navigation/test_bug1747019.html b/docshell/test/navigation/test_bug1747019.html
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+++ b/docshell/test/navigation/test_bug1747019.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test session history and caching</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    var win;
+    var loadCount = 0;
+    var initialContent;
+    // The test loads first a page in a new window, then using
+    // form submission loads another page and then using form submission
+    // again loads third page. That page triggers history.go(-1).
+    // The second page is loaded now again and should have the same content
+    // as it had before.
+    function test() {
+      win = window.open("cache_control_max_age_3600.sjs?initial");
+      window.onmessage = (e) => {
+        is(e.data, "loaded", "Should get load message 'loaded'");
+        ++loadCount;
+        if (loadCount == 1) {
+          win.document.forms[0].submit();
+        } else if (loadCount == 2) {
+          initialContent = win.document.body.textContent;
+          info("The initial content is [" + initialContent + "].");
+          win.document.forms[0].submit();
+        } else if (loadCount == 3) {
+          let newContent = win.document.body.textContent;
+          info("The new content is [" + newContent + "].");
+          win.close();
+          is(initialContent, newContent, "Should have loaded the page from cache.");
+          SimpleTest.finish();
+        } else {
+          ok(false, "Unexpected load count.");
+        }
+      }
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>