chore(cli): throw errors on unknown flags

clsoes angular#3216

Author: cnishina

lib/cli.ts

@@ -31,49 +31,97 @@ process.argv.slice(2).forEach(function(arg: string) {
   }
 });
 
-optimist
-    .usage(
-        'Usage: protractor [configFile] [options]\n' +
-        'configFile defaults to protractor.conf.js\n' +
-        'The [options] object will override values from the config file.\n' +
-        'See the reference config for a full list of options.')
-    .describe('help', 'Print Protractor help menu')
-    .describe('version', 'Print Protractor version')
-    .describe('browser', 'Browsername, e.g. chrome or firefox')
-    .describe('seleniumAddress', 'A running selenium address to use')
-    .describe('seleniumSessionId', 'Attaching an existing session id')
-    .describe('seleniumServerJar', 'Location of the standalone selenium jar file')
-    .describe('seleniumPort', 'Optional port for the selenium standalone server')
-    .describe('baseUrl', 'URL to prepend to all relative paths')
-    .describe('rootElement', 'Element housing ng-app, if not html or body')
-    .describe('specs', 'Comma-separated list of files to test')
-    .describe('exclude', 'Comma-separated list of files to exclude')
-    .describe('verbose', 'Print full spec names')
-    .describe('stackTrace', 'Print stack trace on error')
-    .describe('params', 'Param object to be passed to the tests')
-    .describe('framework', 'Test framework to use: jasmine, mocha, or custom')
-    .describe('resultJsonOutputFile', 'Path to save JSON test result')
-    .describe('troubleshoot', 'Turn on troubleshooting output')
-    .describe('elementExplorer', 'Interactively test Protractor commands')
-    .describe('debuggerServerPort', 'Start a debugger server at specified port instead of repl')
-    .alias('browser', 'capabilities.browserName')
-    .alias('name', 'capabilities.name')
-    .alias('platform', 'capabilities.platform')
-    .alias('platform-version', 'capabilities.version')
-    .alias('tags', 'capabilities.tags')
-    .alias('build', 'capabilities.build')
-    .alias('grep', 'jasmineNodeOpts.grep')
-    .alias('invert-grep', 'jasmineNodeOpts.invertGrep')
-    .alias('explorer', 'elementExplorer')
-    .string('capabilities.tunnel-identifier')
-    .check(function(arg: any) {
-      if (arg._.length > 1) {
-        throw new Error('Error: more than one config file specified');
-      }
-    });
+export interface Option {
+  key: string;
+  value?: string;
+}
+
+let describes: Option[] = [
+  {key: 'help', value: 'Print Protractor help menu'},
+  {key: 'version', value: 'Print Protractor version'},
+  {key: 'browser', value: 'Browsername, e.g. chrome or firefox'},
+  {key: 'seleniumAddress', value: 'A running selenium address to use'},
+  {key: 'seleniumSessionId', value: 'Attaching an existing session id'},
+  {key: 'seleniumServerJar', value: 'Location of the standalone selenium jar file'},
+  {key: 'seleniumPort', value: 'Optional port for the selenium standalone server'},
+  {key: 'baseUrl', value: 'URL to prepend to all relative paths'},
+  {key: 'rootElement', value: 'Element housing ng-app, if not html or body'},
+  {key: 'specs', value: 'Comma-separated list of files to test'},
+  {key: 'exclude', value: 'Comma-separated list of files to exclude'},
+  {key: 'verbose', value: 'Print full spec names'},
+  {key: 'stackTrace', value: 'Print stack trace on error'},
+  {key: 'params', value: 'Param object to be passed to the tests'},
+  {key: 'framework', value: 'Test framework to use: jasmine, mocha, or custom'},
+  {key: 'resultJsonOutputFile', value: 'Path to save JSON test result'},
+  {key: 'troubleshoot', value: 'Turn on troubleshooting output'},
+  {key: 'elementExplorer', value: 'Interactively test Protractor commands'},
+  {key: 'debuggerServerPort', value: 'Start a debugger server at specified port instead of repl'}
+];
+
+let aliases: Option[] = [
+  {key: 'browser', value: 'capabilities.browserName'}, {key: 'name', value: 'capabilities.name'},
+  {key: 'platform', value: 'capabilities.platform'},
+  {key: 'platform-version', value: 'capabilities.version'},
+  {key: 'tags', value: 'capabilities.tags'}, {key: 'build', value: 'capabilities.build'},
+  {key: 'grep', value: 'jasmineNodeOpts.grep'},
+  {key: 'invert-grep', value: 'jasmineNodeOpts.invertGrep'},
+  {key: 'explorer', value: 'elementExplorer'}
+];
+
+let strings: Option[] = [{key: 'capabilities.tunnel-identifier'}];
+
+optimist.usage(
+    'Usage: protractor [configFile] [options]\n' +
+    'configFile defaults to protractor.conf.js\n' +
+    'The [options] object will override values from the config file.\n' +
+    'See the reference config for a full list of options.');
+for (let desc of describes) {
+  optimist.describe(desc.key, desc.value);
+}
+for (let alias of aliases) {
+  optimist.alias(alias.key, alias.value);
+}
+for (let str of strings) {
+  optimist.string(str.key);
+}
+optimist.check(function(arg: any) {
+  if (arg._.length > 1) {
+    throw new Error('Error: more than one config file specified');
+  }
+});
 
 let argv: any = optimist.parse(args);
 
+// Check to see if additional flags were used.
+let unknownKeys: string[] = [];
+for (let key of Object.keys(argv).slice(2)) {
+  if (key === '$0') {
+    continue;
+  }
+  let found = false;
+  for (let desc of describes) {
+    if (desc.key === key) {
+      found = true;
+      break;
+    }
+  }
+  for (let alias of aliases) {
+    if (found) {
+      break;
+    }
+    if (alias.key === key) {
+      found = true;
+      break;
+    }
+  }
+  if (!found) {
+    unknownKeys.push(key);
+  }
+}
+if (unknownKeys.length > 0) {
+  throw new Error('Found extra flags: ' + unknownKeys.join(', '));
+}
+
 if (argv.help) {
   optimist.showHelp();
   process.exit(0);