Add error when running jest directly

``` $ jest FAIL scripts/jest/dont-run-jest-directly.js ● Test suite failed to run Don't run `jest` directly. Run `yarn test` instead. > 1 | throw new Error("Don't run `jest` directly. Run `yarn test` instead."); 2 | at Object.<anonymous> (scripts/jest/dont-run-jest-directly.js:1:96) Test Suites: 1 failed, 1 total Tests: 0 total Snapshots: 0 total Time: 0.866s Ran all test suites. ```
facebook · May 1, 2018 · fa1ba18 · fa1ba18
1 parent 920f30e
commit fa1ba18
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diff --git a/package.json b/package.json
@@ -103,6 +103,9 @@
   "devEngines": {
     "node": "8.x || 9.x"
   },
+  "jest": {
+    "testRegex": "/scripts/jest/dont-run-jest-directly\\.js$"
+  },
   "scripts": {
     "build": "npm run version-check && node ./scripts/rollup/build.js",
     "flow-coverage": "flow-coverage-report --config ./.flowcoverage",

diff --git a/scripts/jest/dont-run-jest-directly.js b/scripts/jest/dont-run-jest-directly.js
@@ -0,0 +1 @@
+throw new Error("Don't run `jest` directly. Run `yarn test` instead.");
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		throw new Error("Don't run `jest` directly. Run `yarn test` instead.");