added jest coverage

Author: timea-solid

.gitignore

@@ -1,5 +1,6 @@
 node_modules
 lib
+coverage
 
 ### VisualStudioCode Patch ###
 # Ignore all local history of files

jest.config.js

@@ -1,10 +1,13 @@
 /** @type {import("jest").Config} */
 export default {
   // verbose: true, // Uncomment for detailed test output
+  collectCoverage: true,
+  coverageDirectory: "coverage",
   testEnvironment: "jsdom",
   testEnvironmentOptions: {
     customExportConditions: ["node"],
   },
+  testPathIgnorePatterns: ["/node_modules/", "/lib/"],
   transform: {
     "^.+\\.[tj]sx?$": ["babel-jest", { configFile: "./babel.config.js" }],
   },

package.json

@@ -12,7 +12,8 @@
     "lint": "eslint 'src/**/*.ts' 'test/**/*.ts'",
     "typecheck": "tsc --noEmit",
     "typecheck:test": "tsc --noEmit -p tsconfig.test.json",
-    "test": "jest",
+    "test": "jest --no-coverage",
+    "test:coverage": "jest --coverage",
     "test-debug": "node --inspect-brk ./node_modules/.bin/jest -i --env jest-environment-node-debug",
     "prepublishOnly": "npm run build && npm run test",
     "preversion": "npm run lint && npm run typecheck && npm test",