Add wpt test of form submission inside an onload handler.

MozReview-Commit-ID: HearVphzHsG Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1397512 [ci skip]
web-platform-tests · Nov 15, 2017 · b3145ac · b3145ac
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diff --git a/...sers/history/the-session-history-of-browsing-contexts/navigation-in-onload.tentative.html b/...sers/history/the-session-history-of-browsing-contexts/navigation-in-onload.tentative.html
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+
+<!doctype html>
+<meta charset=utf-8>
+<title>Navigation in onload handler</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+  var testFiles = [
+    "navigation-in-onload_form-submission-1.tentative.html",
+    "navigation-in-onload_form-submission-iframe.tentative.html",
+    "navigation-in-onload_form-submission-dynamic-iframe.tentative.html"
+  ]
+
+  var t = async_test();
+
+  function scheduleNextTest() {
+    setTimeout(runNextTest, 0);
+  }
+
+  function runNextTest() {
+    var file = testFiles.shift();
+    if (!file) {
+      t.done();
+      return;
+    }
+
+    window.open(file);
+  }
+
+  function verify(actual, expected, desc) {
+    setTimeout(t.step_func(function() {
+      assert_equals(actual, expected, desc);
+    }), 0);
+  }
+
+</script>
+<body onload="scheduleNextTest();"></body>
diff --git a/...ession-history-of-browsing-contexts/navigation-in-onload_form-submission-1.tentative.html b/...ession-history-of-browsing-contexts/navigation-in-onload_form-submission-1.tentative.html
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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Navigation in onload handler through form submission</title>
+    <script>
+      function redirect() {
+        document.querySelector("#redirectionForm").submit();
+      }
+    </script>
+  </head>
+  <body onload="redirect();">
+    <form id="redirectionForm" action="navigation-in-onload_form-submission-2.tentative.html" method="get"></form>
+  </body>
+</html>
diff --git a/...ession-history-of-browsing-contexts/navigation-in-onload_form-submission-2.tentative.html b/...ession-history-of-browsing-contexts/navigation-in-onload_form-submission-2.tentative.html
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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Navigation in onload handler through form submission</title>
+    <script>
+
+      // Verify is called after onload event to ensure history has been stable.
+      function verify() {
+        // Navigation in onload handler through form submission should not
+        // increse history length.
+        var testRunner = window.top.opener;
+        testRunner.verify(history.length, 1,
+          "history.length of subtest '" + top.document.title + "'.");
+        testRunner.scheduleNextTest();
+        setTimeout(window.close.bind(top), 0);
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(verify, 0);">
+  </body>
+</html>
diff --git a/...y-of-browsing-contexts/navigation-in-onload_form-submission-dynamic-iframe.tentative.html b/...y-of-browsing-contexts/navigation-in-onload_form-submission-dynamic-iframe.tentative.html
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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Navigation in onload handler through form submission in a dynamically created iframe</title>
+    <script>
+      function test() {
+        let testFrame = document.createElement("iframe");
+        testFrame.src = "navigation-in-onload_form-submission-1.tentative.html";
+        document.body.appendChild(testFrame);
+      }
+    </script>
+  </head>
+  <body onload="test();">
+  </body>
+</html>
diff --git a/...n-history-of-browsing-contexts/navigation-in-onload_form-submission-iframe.tentative.html b/...n-history-of-browsing-contexts/navigation-in-onload_form-submission-iframe.tentative.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Navigation in onload handler through form submission in an iframe</title>
+  </head>
+  <body>
+    <iframe id="testFrame" src="navigation-in-onload_form-submission-1.tentative.html"></iframe>
+  </body>
+</html>