Fix workflow.

Author: tobiasraabe

.github/workflows/main.yml

@@ -30,42 +30,42 @@ jobs:
       - run: just typing
       - run: just typing-nb
 
-  # run-tests:
+  run-tests:
 
-  #   name: Run tests for ${{ matrix.os }} on ${{ matrix.python-version }}
-  #   runs-on: ${{ matrix.os }}
+    name: Run tests for ${{ matrix.os }} on ${{ matrix.python-version }}
+    runs-on: ${{ matrix.os }}
 
-  #   strategy:
-  #     fail-fast: false
-  #     matrix:
-  #       os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-  #       python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #     - uses: astral-sh/setup-uv@v6
-  #       with:
-  #         enable-cache: true
-  #         python-version: ${{ matrix.python-version }}
-  #     - name: Install just
-  #       uses: extractions/setup-just@v2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v6
+        with:
+          enable-cache: true
+          python-version: ${{ matrix.python-version }}
+      - name: Install just
+        uses: extractions/setup-just@v2
 
-  #     - if: matrix.os == 'ubuntu-latest'
-  #       run: |
-  #         sudo apt-get update
-  #         sudo apt-get install graphviz graphviz-dev
+      - if: matrix.os == 'ubuntu-latest'
+        run: |
+          sudo apt-get update
+          sudo apt-get install graphviz graphviz-dev
 
-  #     - name: Run tests, doctests, and notebook tests
-  #       shell: bash -l {0}
-  #       run: just test-cov
+      - name: Run tests, doctests, and notebook tests
+        shell: bash -l {0}
+        run: just test-cov
 
-  #     - name: Upload test coverage reports to Codecov with GitHub Action
-  #       uses: codecov/codecov-action@v5
+      - name: Upload test coverage reports to Codecov with GitHub Action
+        uses: codecov/codecov-action@v5
 
-  #     - name: Run tests with lowest resolution
-  #       if: matrix.python-version == '3.9' && matrix.os == 'ubuntu-latest'
-  #       run: just test-lowest
+      - name: Run tests with lowest resolution
+        if: matrix.python-version == '3.9' && matrix.os == 'ubuntu-latest'
+        run: just test-lowest
 
-  #     - name: Run tests with highest resolution
-  #       if: matrix.python-version == '3.13' && matrix.os == 'ubuntu-latest'
-  #       run: just test-highest
+      - name: Run tests with highest resolution
+        if: matrix.python-version == '3.13' && matrix.os == 'ubuntu-latest'
+        run: just test-highest