test: reimplement unit testing (#229)

* test: add test for `getInputs` function

* ci(test): add `test-package` job

.github/workflows/test.yaml

@@ -30,6 +30,26 @@ jobs:
       - name: Check Lint
         run: yarn lint
 
+  test-package:
+    name: Test Package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4.0.2
+        with:
+          node-version: latest
+
+      - name: Setup Yarn
+        uses: threeal/setup-yarn-action@v2.0.0
+        with:
+          version: stable
+
+      - name: Test Package
+        run: yarn test
+
   test-action:
     name: Test Action
     runs-on: ${{ matrix.os }}-latest