Add comprehensive integration test for inline struct handling

- Add TestGenWithInlineStructs to verify end-to-end generation
- Test verifies correct parameter generation, flattening of inline structs
- Test verifies no incorrect Headers interfaces are generated
- Test verifies correct argument counts in function calls

Co-authored-by: kevwan <1918356+kevwan@users.noreply.github.com>

tools/goctl/api/tsgen/gen_test.go

@@ -0,0 +1,163 @@
+package tsgen
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/zeromicro/go-zero/tools/goctl/api/parser"
+)
+
+func TestGenWithInlineStructs(t *testing.T) {
+	// Create a temporary directory for the test
+	tmpDir := t.TempDir()
+	apiFile := filepath.Join(tmpDir, "test.api")
+
+	// Write the test API file
+	apiContent := `syntax = "v1"
+
+info (
+	title:   "Test ts generator"
+	desc:    "Test inline struct handling"
+	author:  "test"
+	version: "v1"
+)
+
+// common pagination request
+type PaginationReq {
+	PageNum  int ` + "`form:\"pageNum\"`" + `
+	PageSize int ` + "`form:\"pageSize\"`" + `
+}
+
+// base response
+type BaseResp {
+	Code int64  ` + "`json:\"code\"`" + `
+	Msg  string ` + "`json:\"msg\"`" + `
+}
+
+// common req
+type GetListCommonReq {
+	Sth      string ` + "`form:\"sth\"`" + `
+	PageNum  int    ` + "`form:\"pageNum\"`" + `
+	PageSize int    ` + "`form:\"pageSize\"`" + `
+}
+
+// bad req to ts - inline struct with form tags
+type GetListBadReq {
+	Sth string ` + "`form:\"sth\"`" + `
+	PaginationReq
+}
+
+// bad req to ts 2 - only inline struct with form tags
+type GetListBad2Req {
+	PaginationReq
+}
+
+// GetListResp - inline struct with json tags
+type GetListResp {
+	BaseResp
+}
+
+service test-api {
+	@doc "common req"
+	@handler getListCommon
+	get /getListCommon (GetListCommonReq) returns (GetListResp)
+
+	@doc "bad req"
+	@handler getListBad
+	get /getListBad (GetListBadReq) returns (GetListResp)
+
+	@doc "bad req 2"
+	@handler getListBad2
+	get /getListBad2 (GetListBad2Req) returns (GetListResp)
+
+	@doc "no req"
+	@handler getListNoReq
+	get /getListNoReq returns (GetListResp)
+}`
+
+	err := os.WriteFile(apiFile, []byte(apiContent), 0644)
+	assert.NoError(t, err)
+
+	// Parse the API file
+	api, err := parser.Parse(apiFile)
+	assert.NoError(t, err)
+
+	// Generate TypeScript files
+	outputDir := filepath.Join(tmpDir, "output")
+	err = os.MkdirAll(outputDir, 0755)
+	assert.NoError(t, err)
+
+	// Generate the files directly
+	api.Service = api.Service.JoinPrefix()
+	err = genRequest(outputDir)
+	assert.NoError(t, err)
+	err = genHandler(outputDir, ".", "webapi", api, false)
+	assert.NoError(t, err)
+	err = genComponents(outputDir, api)
+	assert.NoError(t, err)
+
+	// Read generated handler file
+	handlerFile := filepath.Join(outputDir, "test.ts")
+	handlerContent, err := os.ReadFile(handlerFile)
+	assert.NoError(t, err)
+	handler := string(handlerContent)
+
+	// Read generated components file
+	componentsFile := filepath.Join(outputDir, "testComponents.ts")
+	componentsContent, err := os.ReadFile(componentsFile)
+	assert.NoError(t, err)
+	components := string(componentsContent)
+
+	// Verify getListBad function signature and call
+	assert.Contains(t, handler, "export function getListBad(params: components.GetListBadReqParams)")
+	assert.Contains(t, handler, "return webapi.get<components.GetListResp>(`/getListBad`, params)")
+	// Should NOT contain 4 arguments
+	assert.NotContains(t, handler, "getListBad`, params, req, headers")
+
+	// Verify getListBad2 function signature and call
+	assert.Contains(t, handler, "export function getListBad2(params: components.GetListBad2ReqParams)")
+	assert.Contains(t, handler, "return webapi.get<components.GetListResp>(`/getListBad2`, params)")
+	// Should NOT reference non-existent headers
+	assert.NotContains(t, handler, "GetListBad2ReqHeaders")
+
+	// Verify getListCommon function signature and call
+	assert.Contains(t, handler, "export function getListCommon(params: components.GetListCommonReqParams)")
+	assert.Contains(t, handler, "return webapi.get<components.GetListResp>(`/getListCommon`, params)")
+
+	// Verify getListNoReq function signature and call
+	assert.Contains(t, handler, "export function getListNoReq()")
+	assert.Contains(t, handler, "return webapi.get<components.GetListResp>(`/getListNoReq`)")
+
+	// Verify GetListBadReqParams contains flattened fields
+	assert.Contains(t, components, "export interface GetListBadReqParams")
+	// Count occurrences of fields in GetListBadReqParams
+	paramsStart := strings.Index(components, "export interface GetListBadReqParams")
+	paramsEnd := strings.Index(components[paramsStart:], "}")
+	paramsSection := components[paramsStart : paramsStart+paramsEnd]
+	assert.Contains(t, paramsSection, "sth: string")
+	assert.Contains(t, paramsSection, "pageNum: number")
+	assert.Contains(t, paramsSection, "pageSize: number")
+
+	// Verify GetListBad2ReqParams contains flattened fields from inline PaginationReq
+	assert.Contains(t, components, "export interface GetListBad2ReqParams")
+	params2Start := strings.Index(components, "export interface GetListBad2ReqParams")
+	params2End := strings.Index(components[params2Start:], "}")
+	params2Section := components[params2Start : params2Start+params2End]
+	assert.Contains(t, params2Section, "pageNum: number")
+	assert.Contains(t, params2Section, "pageSize: number")
+
+	// Verify no empty Headers interfaces are generated
+	assert.NotContains(t, components, "GetListBadReqHeaders")
+	assert.NotContains(t, components, "GetListBad2ReqHeaders")
+
+	// Verify GetListResp contains flattened fields from BaseResp
+	assert.Contains(t, components, "export interface GetListResp")
+	respStart := strings.Index(components, "export interface GetListResp")
+	respEnd := strings.Index(components[respStart:], "}")
+	respSection := components[respStart : respStart+respEnd]
+	assert.Contains(t, respSection, "code: number")
+	assert.Contains(t, respSection, "msg: string")
+}