1 files changed, 38 insertions, 0 deletions
diff --git a/testing/web-platform/tests/serial/resources/manual.js b/testing/web-platform/tests/serial/resources/manual.js
new file mode 100644
index 0000000000..ac19136b35
--- /dev/null
+++ b/testing/web-platform/tests/serial/resources/manual.js
@@ -0,0 +1,38 @@
+let manualTestPort = null;
+
+navigator.serial.addEventListener('disconnect', (e) => {
+  if (e.target === manualTestPort) {
+    manualTestPort = null;
+  }
+})
+
+async function getPortForManualTest() {
+  if (manualTestPort) {
+    return manualTestPort;
+  }
+
+  const button = document.createElement('button');
+  button.textContent = 'Click to select a device';
+  button.style.display = 'block';
+  button.style.fontSize = '20px';
+  button.style.padding = '10px';
+
+  await new Promise((resolve) => {
+    button.onclick = () => {
+      document.body.removeChild(button);
+      resolve();
+    };
+    document.body.appendChild(button);
+  });
+
+  manualTestPort = await navigator.serial.requestPort({filters: []});
+  assert_true(manualTestPort instanceof SerialPort);
+
+  return manualTestPort;
+}
+
+function manual_serial_test(func, name, properties) {
+  promise_test(async (test) => {
+    await func(test, await getPortForManualTest());
+  }, name, properties);
+}