1 files changed, 38 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/forms/form-submission-0/resources/targetted-form.js b/testing/web-platform/tests/html/semantics/forms/form-submission-0/resources/targetted-form.js
new file mode 100644
index 0000000000..52482c859f
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/forms/form-submission-0/resources/targetted-form.js
@@ -0,0 +1,38 @@
+let frameCounter = 0;
+
+function populateForm(optionalContentHtml) {
+  if (!optionalContentHtml)
+    optionalContentHtml = '';
+  const frameName = "form-test-target-" + frameCounter++;
+  document.body.insertAdjacentHTML(
+      'afterbegin',
+      `<iframe name="${frameName}"></iframe>` +
+          `<form action="/common/blank.html" target="` +
+          `${frameName}">${optionalContentHtml}</form>`);
+  return document.getElementsByName(frameName)[0].nextSibling;
+}
+
+function submitPromise(form, iframe) {
+  return new Promise((resolve, reject) => {
+    iframe.onload = () => resolve(iframe.contentWindow.location.search);
+    iframe.onerror = () => reject(new Error('iframe onerror fired'));
+    form.submit();
+  });
+}
+
+function loadPromise(iframe) {
+  return new Promise((resolve, reject) => {
+    iframe.onload = function() {
+      // The initial about:blank load event can be fired before the form navigation occurs.
+      // See https://github.com/whatwg/html/issues/490 for more information.
+      if (iframe.contentWindow.location == "about:blank") { return; }
+      resolve();
+    };
+    iframe.onerror = () => reject(new Error('iframe onerror fired'));
+  });
+}
+
+function getParamValue(iframe, paramName) {
+  let params = (new URL(iframe.contentWindow.location)).searchParams;
+  return params.get(paramName);
+}