1 files changed, 25 insertions, 0 deletions
diff --git a/testing/web-platform/tests/bluetooth/characteristic/readValue/add-multiple-event-listeners.https.window.js b/testing/web-platform/tests/bluetooth/characteristic/readValue/add-multiple-event-listeners.https.window.js
new file mode 100644
index 0000000000..0eeafd0b79
--- /dev/null
+++ b/testing/web-platform/tests/bluetooth/characteristic/readValue/add-multiple-event-listeners.https.window.js
@@ -0,0 +1,25 @@
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+// META: script=/bluetooth/resources/bluetooth-test.js
+// META: script=/bluetooth/resources/bluetooth-fake-devices.js
+'use strict';
+const test_desc = 'Add multiple event listeners then readValue().';
+
+bluetooth_test(async () => {
+  const {characteristic, fake_characteristic} =
+      await getMeasurementIntervalCharacteristic();
+  await fake_characteristic.setNextReadResponse(GATT_SUCCESS, [0, 1, 2]);
+
+  // Make sure that |characteristic.readValue()| resolves after
+  // |characteristicvaluechanged| is fired |3| times.
+  const results = await assert_promise_resolves_after_event(
+      characteristic /* object */, 'readValue' /* func */,
+      'characteristicvaluechanged' /* event */, 3 /* num_listeners */);
+
+  const read_value = new Uint8Array(results[0].buffer);
+  const event_values = results.slice(1).map(v => new Uint8Array(v.buffer));
+  for (const event_value of event_values) {
+    assert_equals(event_value.buffer, read_value.buffer);
+    assert_array_equals(event_value, read_value);
+  }
+}, test_desc);