Workflow: Added test workflow

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: Running Test
+
+on:
+  pull_request:
+    types:
+      - opened
+    branches:
+      - 'master'
+
+jobs:
+  test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: 'gradle'
+
+      - name: Load Google Service file
+        env:
+          DATA: ${{ secrets.GOOGLE_SERVICES_JSON }}
+        run: echo $DATA | base64 -di > app/google-services.json
+
+      - name: Grand execute permissions to gradlew
+        run: chmod +x gradlew
+
+      - name: Run unit tests
+        run: ./gradlew testDebug