use camelcase, filter dashed args on returns config

packages/jest-cli/src/__tests__/cli/args.test.js

@@ -10,6 +10,7 @@
 
 import type {Argv} from 'types/Argv';
 import {check} from '../../cli/args';
+import {buildArgv} from '../../cli';
 
 describe('check', () => {
   it('returns true if the arguments are valid', () => {
@@ -59,3 +60,15 @@ describe('check', () => {
     );
   });
 });
+
+describe('buildArgv', () => {
+  it('should return only camelcased args ', () => {
+    const mockProcessArgv = jest
+      .spyOn(process.argv, 'slice')
+      .mockImplementation(() => ['--clear-mocks']);
+    const actual = buildArgv(null);
+    expect(actual).not.toHaveProperty('clear-mocks');
+    expect(actual).toHaveProperty('clearMocks', true);
+    mockProcessArgv.mockRestore();
+  });
+});

packages/jest-cli/src/cli/index.js

@@ -35,6 +35,7 @@ import logDebugMessages from '../lib/log_debug_messages';
 
 export async function run(maybeArgv?: Argv, project?: Path) {
   try {
+    // $FlowFixMe:`allow reduced return
     const argv: Argv = buildArgv(maybeArgv, project);
 
     if (argv.init) {
@@ -174,7 +175,7 @@ const readResultsAndExit = (
   }
 };
 
-const buildArgv = (maybeArgv: ?Argv, project: ?Path) => {
+export const buildArgv = (maybeArgv: ?Argv, project: ?Path) => {
   const rawArgv: Argv | string[] = maybeArgv || process.argv.slice(2);
   const argv: Argv = yargs(rawArgv)
     .usage(args.usage)
@@ -186,12 +187,19 @@ const buildArgv = (maybeArgv: ?Argv, project: ?Path) => {
   validateCLIOptions(
     argv,
     Object.assign({}, args.options, {deprecationEntries}),
+    // strip leading dashes
     Array.isArray(rawArgv)
       ? rawArgv.map(rawArgv => rawArgv.replace(/^--?/, ''))
       : Object.keys(rawArgv),
   );
 
-  return argv;
+  // strip dashed args
+  return Object.keys(argv).reduce((result, key) => {
+    if (!key.includes('-')) {
+      result[key] = argv[key];
+    }
+    return result;
+  }, {});
 };
 
 const getProjectListFromCLIArgs = (argv, project: ?Path) => {

packages/jest-validate/package.json

@@ -8,6 +8,7 @@
   "license": "MIT",
   "main": "build/index.js",
   "dependencies": {
+    "camelcase": "^5.0.0",
     "chalk": "^2.0.1",
     "jest-get-type": "^22.1.0",
     "leven": "^2.1.0",

packages/jest-validate/src/validateCLIOptions.js

@@ -10,6 +10,7 @@
 import type {Argv} from 'types/Argv';
 
 import chalk from 'chalk';
+import camelcase from 'camelcase';
 import {createDidYouMeanMessage, format, ValidationError} from './utils';
 import {deprecationWarning} from './deprecated';
 import defaultConfig from './defaultConfig';
@@ -76,16 +77,12 @@ export default function validateCLIOptions(
     (acc, option) => acc.add(option).add(options[option].alias || option),
     new Set(yargsSpecialOptions),
   );
-  const unrecognizedOptions = Object.keys(argv).filter(arg => {
-    const camelCased = arg.replace(/-([^-])/g, (a, b) => b.toUpperCase());
-    if (
-      !allowedOptions.has(camelCased) &&
-      (!rawArgv.length || rawArgv.includes(arg))
-    ) {
-      return true;
-    }
-    return false;
-  }, []);
+  const unrecognizedOptions = Object.keys(argv).filter(
+    arg =>
+      !allowedOptions.has(camelcase(arg)) &&
+      (!rawArgv.length || rawArgv.includes(arg)),
+    [],
+  );
 
   if (unrecognizedOptions.length) {
     throw createCLIValidationError(unrecognizedOptions, allowedOptions);

yarn.lock

@@ -3437,6 +3437,11 @@ camelcase@^4.1.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
   integrity sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=
 
+camelcase@^5.0.0:
+  version "5.0.0"
+  resolved "https://repo.artifacts.weather.com/api/npm/web-decoupling-npm-virtual/camelcase/-/camelcase-5.0.0.tgz#03295527d58bd3cd4aa75363f35b2e8d97be2f42"
+  integrity sha1-AylVJ9WL081Kp1Nj81sujZe+L0I=
+
 caniuse-api@^1.5.2:
   version "1.6.1"
   resolved "https://registry.yarnpkg.com/caniuse-api/-/caniuse-api-1.6.1.tgz#b534e7c734c4f81ec5fbe8aca2ad24354b962c6c"