seperated build and test, cache dependancies, and ensure test run after successful build

Author: JoshuaHarris391

.github/workflows/build.yml

@@ -18,22 +18,52 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
-
-    - name: Set up Python
-      uses: actions/setup-python@v4
-      with:
-        python-version: 3.9
-
-    - name: Install dependencies
-      run: |
-        python -m venv venv
-        source venv/bin/activate
-        pip install -r requirements.txt
-
-    - name: Run tests
-      run: |
-        source venv/bin/activate
-        pip install -e .
-        pytest tests/
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.9
+
+      - name: Install dependencies
+        run: |
+          python -m venv venv
+          source venv/bin/activate
+          pip install -r requirements.txt
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: venv
+          key: ${{ runner.os }}-venv-${{ hashFiles('requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-venv-
+  test:
+    needs: build  # Ensures tests run only after a successful build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.9
+
+      - name: Restore cached dependencies
+        uses: actions/cache@v3
+        with:
+          path: venv
+          key: ${{ runner.os }}-venv-${{ hashFiles('requirements.txt') }}
+
+      - name: Activate virtual environment and install dependencies
+        run: |
+          source venv/bin/activate
+          pip install -e .
+
+      - name: Run tests
+        run: |
+          source venv/bin/activate
+          pytest tests/