Configure Jest using Typescript

This brings auto-completion to Jest configuration. See: jestjs/jest#10564 See: jestjs/jest#9636 (comment)
johnmartel · Oct 28, 2020 · 06b579b · 06b579b
1 parent 5b3f863
commit 06b579b
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Showing 4 changed files with 41 additions and 2 deletions.
diff --git a/jest.config.js → jest.config.ts b/jest.config.js → jest.config.ts
@@ -1,4 +1,6 @@
-module.exports = {
+import type { Config } from '@jest/types';
+
+const config: Config.InitialOptions = {
   // this is a workaround since enabling coverage breaks sourceMaps
   // See: https://github.com/kulshekhar/ts-jest/issues/917
   // See: https://github.com/facebook/jest/issues/5739
@@ -18,3 +20,4 @@ module.exports = {
   reporters: ['default', 'jest-junit'],
   testEnvironment: 'node',
 };
+export default config;
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -27,6 +27,7 @@
     "test:ci": "jest --coverage --ci"
   },
   "devDependencies": {
+    "@jest/types": "26.6.1",
     "@types/jest": "26.0.15",
     "@typescript-eslint/eslint-plugin": "2.34.0",
     "@typescript-eslint/parser": "2.34.0",
@@ -40,6 +41,7 @@
     "prettier": "2.1.2",
     "rimraf": "3.0.2",
     "ts-jest": "26.4.2",
+    "ts-node": "9.0.0",
     "typescript": "4.0.3"
   },
   "dependencies": {

diff --git a/tsconfig.json b/tsconfig.json
@@ -22,5 +22,8 @@
   "include": [
     "src/**/*"
   ],
-  "compileOnSave": true
+  "compileOnSave": true,
+  "tsNode": {
+    "compiler": "typescript"
+  }
 }