1 files changed, 40 insertions, 0 deletions
diff --git a/testing/web-platform/tests/serial/serialPort_ondisconnect.https.any.js b/testing/web-platform/tests/serial/serialPort_ondisconnect.https.any.js
new file mode 100644
index 0000000000..b20f69d265
--- /dev/null
+++ b/testing/web-platform/tests/serial/serialPort_ondisconnect.https.any.js
@@ -0,0 +1,40 @@
+// META: script=/resources/test-only-api.js
+// META: script=/serial/resources/common.js
+// META: script=resources/automation.js
+
+serial_test(async (t, fake) => {
+  // Don't listen for 'disconnect' events on navigator.serial so we can listen
+  // for them on each SerialPort instance instead.
+  const eventWatcher = new EventWatcher(t, navigator.serial, ['connect']);
+
+  // Wait for getPorts() to resolve in order to ensure that the Mojo client
+  // interface has been configured.
+  let ports = await navigator.serial.getPorts();
+  assert_equals(ports.length, 0);
+
+  // Add ports one at a time so that we can map tokens to ports.
+  const token1 = fake.addPort();
+  const port1 = (await eventWatcher.wait_for(['connect'])).target;
+  const port1Watcher = new EventWatcher(t, port1, ['disconnect']);
+
+  const token2 = fake.addPort();
+  const port2 = (await eventWatcher.wait_for(['connect'])).target;
+  const port2Watcher = new EventWatcher(t, port2, ['disconnect']);
+
+  fake.removePort(token2);
+  const event1 = await port2Watcher.wait_for(['disconnect']);
+  assert_true(event1 instanceof Event);
+  assert_equals(event1.target, port2);
+
+  ports = await navigator.serial.getPorts();
+  assert_equals(ports.length, 1);
+  assert_equals(ports[0], port1);
+
+  fake.removePort(token1);
+  const event2 = await port1Watcher.wait_for(['disconnect']);
+  assert_true(event2 instanceof Event);
+  assert_equals(event2.target, port1);
+
+  ports = await navigator.serial.getPorts();
+  assert_equals(ports.length, 0);
+}, 'A "disconnect" event is fired on ports when they are removed.');