Improve tests for JavaScript (#3496)

- Upgrade dependencies
    - chai (3.5.0 -> 4.0.1)
    - chai-enzyme (0.6.1 -> 0.7.1)
    - sinon (2.2.0 -> 2.3.2)
- Change extensions from .jsx to .js
- Don't assign `React` to `global`
- Check code format using ESLint

1 files changed, 5 insertions, 5 deletions

diff --git a/package.json b/package.json
index c686e99e7..ee65dbea1 100644
--- a/package.json
+++ b/package.json
@@ -9,8 +9,8 @@
     "start": "rimraf ./tmp/streaming && babel ./streaming/index.js --out-dir ./tmp && node ./tmp/streaming/index.js",
     "storybook": "NODE_ENV=test start-storybook -p 9001 -c storybook",
     "test": "npm run test:lint && npm run test:mocha",
-    "test:lint": "eslint -c .eslintrc.yml --ext=js app/javascript/ config/webpack/ storyboard/ streaming/",
-    "test:mocha": "NODE_ENV=test mocha --require ./spec/javascript/setup.js --compilers js:babel-register ./spec/javascript/components/*.test.jsx",
+    "test:lint": "eslint -c .eslintrc.yml --ext=js app/javascript/ config/webpack/ spec/javascript/ storyboard/ streaming/",
+    "test:mocha": "NODE_ENV=test mocha --require ./spec/javascript/setup.js --compilers js:babel-register ./spec/javascript/components/*.test.js",
     "postinstall": "npm rebuild node-sass"
   },
   "repository": {
@@ -116,8 +116,8 @@
   "devDependencies": {
     "@kadira/storybook": "^2.35.3",
     "babel-eslint": "^7.2.3",
-    "chai": "^3.5.0",
-    "chai-enzyme": "^0.6.1",
+    "chai": "^4.0.1",
+    "chai-enzyme": "^0.7.1",
     "enzyme": "^2.8.2",
     "eslint": "^3.19.0",
     "eslint-plugin-jsx-a11y": "^4.0.0",
@@ -127,7 +127,7 @@
     "mocha": "^3.4.1",
     "react-intl-translations-manager": "^5.0.0",
     "react-test-renderer": "^15.5.4",
-    "sinon": "^2.2.0",
+    "sinon": "^2.3.2",
     "webpack-dev-server": "^2.4.5"
   },
   "optionalDependencies": {