Implement #4442 , goctl generate unit test files for api handler and logic (#4443)

tools/goctl/api/gogen/logic_test.tpl

@@ -0,0 +1,69 @@
+package {{.pkgName}}
+
+import (
+    "context"
+    "testing"
+
+    {{.imports}}
+    "github.com/stretchr/testify/assert"
+    "github.com/stretchr/testify/require"
+)
+
+func Test{{.logic}}_{{.function}}(t *testing.T) {
+    c := config.Config{}
+    mockSvcCtx := svc.NewServiceContext(c)
+    // init mock service context here
+
+    tests := []struct {
+        name       string
+        ctx        context.Context
+        setupMocks func()
+        {{if .hasRequest}}req        *{{.requestType}}{{end}}
+        wantErr    bool
+        checkResp  func{{if .hasResponse}}{{.responseType}}{{else}}(err error){{end}}
+    }{
+        {
+            name: "response error",
+            ctx:  context.Background(),
+            setupMocks: func() {
+                // mock data for this test case
+            },
+            {{if .hasRequest}}req:  &{{.requestType}}{
+                // TODO: init your request here
+            },{{end}}
+            wantErr: true,
+            checkResp: func{{if .hasResponse}}{{.responseType}}{{else}}(err error){{end}} {
+                // TODO: Add your check logic here
+            },
+        },
+        {
+            name: "successful",
+            ctx:  context.Background(),
+            setupMocks: func() {
+                // Mock data for this test case
+            },
+            {{if .hasRequest}}req:  &{{.requestType}}{
+                // TODO: init your request here
+            },{{end}}
+            wantErr: false,
+            checkResp: func{{if .hasResponse}}{{.responseType}}{{else}}(err error){{end}} {
+                // TODO: Add your check logic here
+            },
+        },
+    }
+
+    for _, tt := range tests {
+        t.Run(tt.name, func(t *testing.T) {
+            tt.setupMocks()
+            l := New{{.logic}}(tt.ctx, mockSvcCtx)
+            {{if .hasResponse}}resp, {{end}}err := l.{{.function}}({{if .hasRequest}}tt.req{{end}})
+            if tt.wantErr {
+                assert.Error(t, err)
+            } else {
+                require.NoError(t, err)
+                {{if .hasResponse}}assert.NotNil(t, resp){{end}}
+            }
+            tt.checkResp({{if .hasResponse}}resp, {{end}}err)
+        })
+    }
+}