Complain about unknown options when argument and action handler on program

index.js

@@ -754,7 +754,7 @@ Command.prototype.parseArgs = function(args, unknown) {
     if (this.listeners('command:' + name).length) {
       this.emit('command:' + args.shift(), args, unknown);
     } else {
-      this.emit('command:*', args);
+      this.emit('command:*', args, unknown);
     }
   } else {
     outputHelpIfNecessary(this, unknown);

tests/command.unknownOption.test.js

@@ -0,0 +1,85 @@
+const commander = require('../');
+
+// Checking for detection of unknown options, including regression tests for some past issues.
+
+describe('.version', () => {
+  // Optional. Use internal knowledge to suppress output to keep test output clean.
+  let consoleErrorSpy;
+
+  beforeAll(() => {
+    consoleErrorSpy = jest.spyOn(console, 'error').mockImplementation(() => { });
+  });
+
+  afterEach(() => {
+    consoleErrorSpy.mockClear();
+  });
+
+  afterAll(() => {
+    consoleErrorSpy.mockRestore();
+  });
+
+  test('when specify unknown option with subcommand and action handler then error', () => {
+    const program = new commander.Command();
+    program
+      .exitOverride()
+      .command('info')
+      .action(() => {});
+
+    let caughtErr;
+    try {
+      program.parse(['node', 'info', '--NONSENSE']);
+    } catch (err) {
+      caughtErr = err;
+    }
+    expect(caughtErr.code).toBe('commander.unknownOption');
+  });
+
+  test('when specify unknown option with subcommand argument and action handler then error', () => {
+    const program = new commander.Command();
+    program
+      .exitOverride()
+      .command('info <file>')
+      .action(() => {});
+
+    let caughtErr;
+    try {
+      program.parse(['node', 'test', 'info', 'a', '--NONSENSE']);
+    } catch (err) {
+      caughtErr = err;
+    }
+    expect(caughtErr.code).toBe('commander.unknownOption');
+  });
+
+  test('when specify unknown option with program and action handler then error', () => {
+    const program = new commander.Command();
+    program
+      .exitOverride()
+      .arguments('[file]')
+      .action(() => {});
+
+    let caughtErr;
+    try {
+      program.parse(['node', 'test', '--NONSENSE']);
+    } catch (err) {
+      caughtErr = err;
+    }
+    expect(caughtErr.code).toBe('commander.unknownOption');
+  });
+
+  test('when specify unknown option with program argument and action handler then error', () => {
+    // Regression test from #965
+    const program = new commander.Command();
+    program
+      .exitOverride()
+      .arguments('[file]')
+      .action(() => {});
+
+    let caughtErr;
+    try {
+      program.parse(['node', 'test', 'info', 'a', '--NONSENSE']);
+    } catch (err) {
+      caughtErr = err;
+    }
+    expect(caughtErr.code).toBe('commander.unknownOption');
+  });
+});