Also test protocol monitor autocomplete

Bug: none
Change-Id: I88792c9561ab7950063335c9b949a7d10e6a5ae9
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6330113
Reviewed-by: Nancy Li <nancyly@chromium.org>
Commit-Queue: Nancy Li <nancyly@chromium.org>
Auto-Submit: Danil Somsikov <dsv@chromium.org>

Author: danilsomsikov

front_end/panels/protocol_monitor/ProtocolMonitor.test.ts

@@ -27,15 +27,20 @@ let jsonEditor!: JSONEditor;
 let sendRawMessageStub!: sinon.SinonStub;
 
 describeWithEnvironment('ProtocolMonitor', () => {
+  let originalSendRawMessage: typeof InspectorBackend.test.sendRawMessage;
   beforeEach(() => {
-    // sendRawMessageStub = sinon.stub(InspectorBackend.test,'sendRawMessage');
     sendRawMessageStub = sinon.stub();
+    originalSendRawMessage = InspectorBackend.test.sendRawMessage;
     InspectorBackend.test.sendRawMessage = sendRawMessageStub;
     jsonEditor = new JSONEditor(document.createElement('div'));
     view = createViewFunctionStub(ProtocolMonitorImpl, {editorWidget: jsonEditor});
     protocolMonitor = new ProtocolMonitorImpl(view);
   });
 
+  afterEach(() => {
+    InspectorBackend.test.sendRawMessage = originalSendRawMessage;
+  });
+
   it('sends commands', async () => {
     view.input.onCommandSubmitted(
         new CustomEvent('submit', {detail: '{"command":"Test.test","parameters":{"test":"test"}}'}));
@@ -46,6 +51,14 @@ describeWithEnvironment('ProtocolMonitor', () => {
     assert.deepEqual(sendRawMessageStub.getCall(0).args[3], '');
   });
 
+  it('includes previous commands into autocomplete', async () => {
+    view.input.onCommandSubmitted(new CustomEvent('submit', {detail: 'Test.test1'}));
+    view.input.onCommandSubmitted(new CustomEvent('submit', {detail: 'Test.test2'}));
+    protocolMonitor.requestUpdate();
+    assert.includeOrderedMembers(
+        (await view.nextInput).commandSuggestions, ['Test.test2', 'Test.test1', 'Accessibility.disable']);
+  });
+
   it('records commands', async () => {
     protocolMonitor.wasShown();
     InspectorBackend.test.onMessageSent?.({domain: 'Test', method: 'Test.test', params: {test: 'test'}, id: 1}, null);