Check if any tests contain entrypoints that don't contain the library…

… feature

.github/workflows/doc-test.yml

@@ -10,6 +10,30 @@ on:
   workflow_dispatch:
 
 jobs:
+  entrypoint-check:
+    name: "Extract and run entrypoint checks"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v4
+      - name: "Install ripgrep"
+        run: sudo apt-get install -y ripgrep
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: |
+            docs-test-gen
+      - name: Extract all the tests
+        working-directory: ./docs-test-gen
+        run: cargo run
+      - name: Check all the extracted tests
+        working-directory: ./docs-test-gen/tests
+        run: |
+          for file in *; do
+            echo "Checking $file"
+            rg -q "^\s*#\[entry_point\]" $file && exit 1
+          done
+
   extract-and-run:
     name: "Extract and run tests"
     runs-on: "ubuntu-latest"