1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/serial/serialPort_close.https.any.js b/testing/web-platform/tests/serial/serialPort_close.https.any.js
new file mode 100644
index 0000000000..ec949a9917
--- /dev/null
+++ b/testing/web-platform/tests/serial/serialPort_close.https.any.js
@@ -0,0 +1,26 @@
+// META: script=/resources/test-only-api.js
+// META: script=/serial/resources/common.js
+// META: script=resources/automation.js
+
+serial_test(async (t, fake) => {
+  const {port, fakePort} = await getFakeSerialPort(fake);
+
+  await promise_rejects_dom(t, 'InvalidStateError', port.close());
+}, 'A SerialPort cannot be closed if it was never opened.');
+
+serial_test(async (t, fake) => {
+  const {port, fakePort} = await getFakeSerialPort(fake);
+
+  await port.open({baudRate: 9600});
+  await port.close();
+  await promise_rejects_dom(t, 'InvalidStateError', port.close());
+}, 'A SerialPort cannot be closed if it is already closed.');
+
+serial_test(async (t, fake) => {
+  const {port, fakePort} = await getFakeSerialPort(fake);
+
+  await port.open({baudRate: 9600});
+  const closePromise = port.close();
+  await promise_rejects_dom(t, 'InvalidStateError', port.close());
+  await closePromise;
+}, 'A SerialPort cannot be closed if it is being closed.');