Make tag order deterministic

examples/petstore/lib/testdata/doc/openapi.golden.json

@@ -1070,13 +1070,13 @@
 	],
 	"tags": [
 		{
-			"name": "pets"
+			"name": "my-tag"
 		},
 		{
-			"name": "std"
+			"name": "pets"
 		},
 		{
-			"name": "my-tag"
+			"name": "std"
 		}
 	]
 }

mux.go

@@ -264,7 +264,7 @@ func DefaultDescription[T any](handler string, middlewares []T) string {
 		for i, fn := range middlewares {
 			description += "\n- `" + FuncName(fn) + "`"
 
-			if i == 6 {
+			if i == 4 {
 				description += "\n- more middleware..."
 				break
 			}

openapi.go

@@ -89,6 +89,11 @@ func declareAllTagsFromOperations(s *Server) {
 			}
 		}
 	}
+
+	// Make sure tags are sorted
+	slices.SortFunc(s.OpenAPI.Description().Tags, func(a, b *openapi3.Tag) int {
+		return strings.Compare(a.Name, b.Name)
+	})
 }
 
 // OutputOpenAPISpec takes the OpenAPI spec and outputs it to a JSON file and/or serves it on a URL.

option_test.go

@@ -828,7 +828,7 @@ func TestOptionDescription(t *testing.T) {
 			option.Middleware(dummyMiddleware), // 7th middleware, should not be included
 		)
 
-		require.Equal(t, "#### Controller: \n\n`github.com/go-fuego/fuego_test.helloWorld`\n\n#### Middlewares:\n\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n\n---\n\nanother description", route.Operation.Description)
+		require.Equal(t, "#### Controller: \n\n`github.com/go-fuego/fuego_test.helloWorld`\n\n#### Middlewares:\n\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- `github.com/go-fuego/fuego_test.dummyMiddleware`\n- more middleware...\n\n---\n\nanother description", route.Operation.Description)
 	})
 }