fix(golang): escape generated enum values

Author: sjh9714

internal/codegen/golang/templates/template.tmpl

@@ -92,7 +92,7 @@ type {{.Name}} string
 
 const (
 	{{- range .Constants}}
-	{{.Name}} {{.Type}} = "{{.Value}}"
+	{{.Name}} {{.Type}} = {{printf "%q" .Value}}
 	{{- end}}
 )
 

internal/endtoend/testdata/enum_escaped_values/postgresql/stdlib/exec.json

@@ -0,0 +1,3 @@
+{
+  "contexts": ["base"]
+}

internal/endtoend/testdata/enum_escaped_values/postgresql/stdlib/go/db.go

@@ -0,0 +1,2 @@
+-- name: GetUser :one
+SELECT id, role, payload FROM users WHERE id = $1;

internal/endtoend/testdata/enum_escaped_values/postgresql/stdlib/go/models.go

@@ -0,0 +1,15 @@
+CREATE TYPE injection AS ENUM (
+    'safe_value',
+    'injected" + "arbitrary_go_code" + "'
+);
+
+CREATE TYPE user_role AS ENUM (
+    'admin',
+    'user\nadmin'
+);
+
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    role user_role NOT NULL,
+    payload injection NOT NULL
+);

internal/endtoend/testdata/enum_escaped_values/postgresql/stdlib/go/query.sql.go

@@ -0,0 +1,9 @@
+version: "2"
+sql:
+  - engine: postgresql
+    schema: "schema.sql"
+    queries: "query.sql"
+    gen:
+      go:
+        package: "querytest"
+        out: "go"