Validate that generated files are up to date

.github/workflows/go.yml

@@ -1,13 +1,6 @@
-# This workflow will build a golang project
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
-
 name: Go
 
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
+on: [push]
 
 jobs:
   lint:
@@ -29,6 +22,28 @@ jobs:
       - name: Build
         run: go build -v ./...
 
+  generate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.20'
+
+      - name: Run go generate
+        run: |
+          go install golang.org/x/tools/cmd/stringer
+          
+          go generate ./...
+          git diff --exit-code || (echo "Generated files have changed. Please run 'go generate' and commit the changes." && exit 1)
+
+      - name: Validate
+        run: |
+          go mod tidy
+          git diff --exit-code || (echo "go.mod or go.sum have changed. Please run 'go mod tidy' and commit the changes." && exit 1)
+
   test:
     runs-on: ubuntu-latest
     steps: