test(cli): add status wrapper oapi-codegen e2e

Add an oapi-codegen-backed example and e2e coverage for generic status wrappers so generated specs and SDK types expose the real response payloads and statuses.

Author: miclle

examples/status-wrapper-oapi-codegen/README.md

@@ -0,0 +1,35 @@
+# Status Wrapper OAPI Codegen Example
+
+This example protects the integration path that caught the original
+`StatusResponse[T]` issue:
+
+```text
+Fox handler -> fox-openapi CLI -> openapi.yaml -> oapi-codegen -> Go SDK types
+```
+
+The handlers return a generic render wrapper only to control success status
+codes. The generated OpenAPI contract should expose the real wire responses:
+
+- `POST /api/v1/sbx/sandboxes` returns `201` with `handler_SandboxResponse`.
+- `POST /api/v1/sbx/templates` returns `202` with `handler_TemplateResponse`.
+- No `StatusResponse[...]` wrapper schema should appear in the spec or generated
+  SDK code.
+
+Generate the OpenAPI document:
+
+```bash
+go run github.com/fox-gonic/openapi/cmd/fox-openapi@latest \
+  --workdir . \
+  --entry github.com/fox-gonic/openapi/examples/status-wrapper-oapi-codegen/internal/handler.NewEngine \
+  --out api/openapi.yaml \
+  --title "Status Wrapper OAPI Codegen Example" \
+  --version 1.0.0
+```
+
+Generate downstream SDK code:
+
+```bash
+go run github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen@v2.4.1 \
+  --config oapi-codegen.yaml \
+  api/openapi.yaml
+```

examples/status-wrapper-oapi-codegen/api/openapi.yaml

@@ -0,0 +1,101 @@
+components:
+  responses:
+    HTTPError:
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/HTTPError"
+      description: Error response
+  schemas:
+    HTTPError:
+      additionalProperties: true
+      properties:
+        code:
+          type: string
+        error:
+          type: string
+      required:
+      - code
+      - error
+      type: object
+    handler_SandboxResponse:
+      properties:
+        client_id:
+          description: ClientID identifies this platform to SDK clients.
+          type: string
+        sandbox_id:
+          description: SandboxID is the sandbox instance ID.
+          type: string
+        template_id:
+          description: TemplateID is the template used by the sandbox.
+          type: string
+      type: object
+    handler_TemplateResponse:
+      properties:
+        build_id:
+          description: BuildID is the latest template build ID.
+          type: string
+        name:
+          description: Name is the template name.
+          type: string
+        template_id:
+          description: TemplateID is the template ID.
+          type: string
+      type: object
+info:
+  title: Status Wrapper OAPI Codegen Example
+  version: 1.0.0
+openapi: 3.0.3
+paths:
+  /api/v1/sbx/sandboxes:
+    post:
+      description: CreateSandbox creates a sandbox from a template.
+      operationId: github_com_fox_gonic_openapi_examples_status_wrapper_oapi_codegen_internal_handler_CreateSandbox
+      requestBody:
+        content:
+          application/json:
+            schema:
+              properties:
+                template_id:
+                  description: TemplateID selects the template used to create the sandbox.
+                  type: string
+              required:
+              - template_id
+              type: object
+        required: true
+      responses:
+        "201":
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/handler_SandboxResponse"
+          description: Created
+        default:
+          $ref: "#/components/responses/HTTPError"
+      summary: CreateSandbox creates a sandbox from a template.
+  /api/v1/sbx/templates:
+    post:
+      description: CreateTemplate creates a template build request.
+      operationId: github_com_fox_gonic_openapi_examples_status_wrapper_oapi_codegen_internal_handler_CreateTemplate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              properties:
+                name:
+                  description: Name is the template name.
+                  type: string
+              required:
+              - name
+              type: object
+        required: true
+      responses:
+        "202":
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/handler_TemplateResponse"
+          description: Accepted
+        default:
+          $ref: "#/components/responses/HTTPError"
+      summary: CreateTemplate creates a template build request.

examples/status-wrapper-oapi-codegen/fox-openapi.yaml

@@ -0,0 +1,8 @@
+entry: github.com/fox-gonic/openapi/examples/status-wrapper-oapi-codegen/internal/handler.NewEngine
+out: api/openapi.yaml
+format: yaml
+sources:
+  - ./internal/handler
+info:
+  title: Status Wrapper OAPI Codegen Example
+  version: 1.0.0

examples/status-wrapper-oapi-codegen/go.mod

@@ -0,0 +1,45 @@
+module github.com/fox-gonic/openapi/examples/status-wrapper-oapi-codegen
+
+go 1.25.0
+
+require github.com/fox-gonic/fox v0.0.11
+
+require (
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
+	github.com/gin-contrib/cors v1.7.7 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/gin-gonic/gin v1.12.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.30.1 // indirect
+	github.com/goccy/go-json v0.10.6 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
+	github.com/quic-go/quic-go v0.59.0 // indirect
+	github.com/rs/zerolog v1.35.1 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.1 // indirect
+	go.mongodb.org/mongo-driver/v2 v2.5.0 // indirect
+	golang.org/x/arch v0.25.0 // indirect
+	golang.org/x/crypto v0.50.0 // indirect
+	golang.org/x/net v0.53.0 // indirect
+	golang.org/x/sys v0.43.0 // indirect
+	golang.org/x/text v0.36.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+)
+
+replace github.com/fox-gonic/openapi => ../..

examples/status-wrapper-oapi-codegen/go.sum

@@ -0,0 +1,103 @@
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+golang.org/x/text v0.36.0 h1:JfKh3XmcRPqZPKevfXVpI1wXPTqbkE5f7JA92a55Yxg=
+golang.org/x/text v0.36.0/go.mod h1:NIdBknypM8iqVmPiuco0Dh6P5Jcdk8lJL0CUebqK164=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

examples/status-wrapper-oapi-codegen/internal/apis/doc.go

@@ -0,0 +1,2 @@
+// Package apis is the output package for oapi-codegen in this example.
+package apis

examples/status-wrapper-oapi-codegen/internal/handler/handler.go

@@ -0,0 +1,80 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/fox-gonic/fox"
+)
+
+type StatusResponse[T any] struct {
+	status int
+	data   T
+}
+
+func statusResponse[T any](status int, data T) StatusResponse[T] {
+	return StatusResponse[T]{status: status, data: data}
+}
+
+func (r StatusResponse[T]) Render(w http.ResponseWriter) error {
+	r.WriteContentType(w)
+	w.WriteHeader(r.status)
+	return json.NewEncoder(w).Encode(r.data)
+}
+
+func (r StatusResponse[T]) WriteContentType(w http.ResponseWriter) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+}
+
+type CreateSandboxRequest struct {
+	// TemplateID selects the template used to create the sandbox.
+	TemplateID string `json:"template_id" binding:"required"`
+}
+
+type SandboxResponse struct {
+	// SandboxID is the sandbox instance ID.
+	SandboxID string `json:"sandbox_id"`
+	// TemplateID is the template used by the sandbox.
+	TemplateID string `json:"template_id"`
+	// ClientID identifies this platform to SDK clients.
+	ClientID string `json:"client_id"`
+}
+
+type CreateTemplateRequest struct {
+	// Name is the template name.
+	Name string `json:"name" binding:"required"`
+}
+
+type TemplateResponse struct {
+	// TemplateID is the template ID.
+	TemplateID string `json:"template_id"`
+	// BuildID is the latest template build ID.
+	BuildID string `json:"build_id"`
+	// Name is the template name.
+	Name string `json:"name"`
+}
+
+func NewEngine() *fox.Engine {
+	engine := fox.New()
+	engine.POST("/api/v1/sbx/sandboxes", CreateSandbox)
+	engine.POST("/api/v1/sbx/templates", CreateTemplate)
+	return engine
+}
+
+// CreateSandbox creates a sandbox from a template.
+func CreateSandbox(_ *fox.Context, req CreateSandboxRequest) (StatusResponse[SandboxResponse], error) {
+	return statusResponse(http.StatusCreated, SandboxResponse{
+		SandboxID:  "sbx_123",
+		TemplateID: req.TemplateID,
+		ClientID:   "client_123",
+	}), nil
+}
+
+// CreateTemplate creates a template build request.
+func CreateTemplate(_ *fox.Context, req CreateTemplateRequest) (StatusResponse[TemplateResponse], error) {
+	return statusResponse(http.StatusAccepted, TemplateResponse{
+		TemplateID: "tpl_123",
+		BuildID:    "build_123",
+		Name:       req.Name,
+	}), nil
+}

examples/status-wrapper-oapi-codegen/oapi-codegen.yaml

@@ -0,0 +1,7 @@
+package: apis
+output: internal/apis/sandbox.gen.go
+generate:
+  models: true
+  client: true
+output-options:
+  name-normalizer: ToCamelCaseWithInitialisms