added exhaustive unit tests which closes #5 (#7)

Author: sullyTheDev

.github/workflows/npm-publish.yml

@@ -29,12 +29,15 @@ jobs:
     # set up git since we will later push to the repo
     - run: git config --global user.name "GitHub CD bot"
     - run: git config --global user.email "github-cd-bot@example.com"
-    # upgrade npm version in package.json to the tag used in the release.
-    - run: npm version ${{ github.event.release.tag_name }}
     # build the project
     - run: npm run build
+    # run linter
+    - run: npm run lint
     # run tests just in case
-    # - run: npm test
+    - run: npm test
+    # upgrade npm version in package.json to the tag used in the release.
+    - run: npm version ${{ github.event.release.tag_name }}
+    # publish the package
     - run: npm publish
       env:
         # Use a token to publish to NPM. See below for how to set it up

jest.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+    "roots": [
+      "<rootDir>/src"
+    ],
+    "testMatch": [
+      "**/__tests__/**/*.+(ts|tsx|js)",
+      "**/?(*.)+(spec|test).+(ts|tsx|js)"
+    ],
+    "transform": {
+      "^.+\\.(ts|tsx)$": "ts-jest"
+    },
+  }