1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/serial/serialPort_getSignals.https.any.js b/testing/web-platform/tests/serial/serialPort_getSignals.https.any.js
new file mode 100644
index 0000000000..a570e35987
--- /dev/null
+++ b/testing/web-platform/tests/serial/serialPort_getSignals.https.any.js
@@ -0,0 +1,63 @@
+// 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.getSignals());
+}, 'getSignals() rejects if the port is not open');
+
+serial_test(async (t, fake) => {
+  const {port, fakePort} = await getFakeSerialPort(fake);
+  await port.open({baudRate: 9600});
+
+  let expectedSignals = {
+    dataCarrierDetect: false,
+    clearToSend: false,
+    ringIndicator: false,
+    dataSetReady: false
+  };
+  fakePort.simulateInputSignals(expectedSignals);
+  let signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals);
+
+  expectedSignals.dataCarrierDetect = true;
+  fakePort.simulateInputSignals(expectedSignals);
+  signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals, 'DCD set');
+
+  expectedSignals.clearToSend = true;
+  fakePort.simulateInputSignals(expectedSignals);
+  signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals, 'CTS set');
+
+  expectedSignals.ringIndicator = true;
+  fakePort.simulateInputSignals(expectedSignals);
+  signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals, 'RI set');
+
+  expectedSignals.dataSetReady = true;
+  fakePort.simulateInputSignals(expectedSignals);
+  signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals, 'DSR set');
+}, 'getSignals() returns the current state of input control signals');
+
+serial_test(async (t, fake) => {
+  const {port, fakePort} = await getFakeSerialPort(fake);
+  await port.open({baudRate: 9600});
+
+  fakePort.simulateInputSignalFailure(true);
+  await promise_rejects_dom(t, 'NetworkError', port.getSignals());
+
+  fakePort.simulateInputSignalFailure(false);
+  const expectedSignals = {
+    dataCarrierDetect: false,
+    clearToSend: false,
+    ringIndicator: false,
+    dataSetReady: false
+  };
+  const signals = await port.getSignals();
+  assert_object_equals(signals, expectedSignals);
+
+  await port.close();
+}, 'getSignals() rejects on failure');