diff --git a/boomer.go b/boomer.go
index 93e213ef..820756f0 100644
--- a/boomer.go
+++ b/boomer.go
@@ -35,12 +35,12 @@ func (b *Boomer) SetDebug(debug bool) *Boomer {
 
 func (b *Boomer) Run(testcases ...ITestCase) {
 	var taskSlice []*boomer.Task
-	for _, testcase := range testcases {
-		tcStruct, err := testcase.ToStruct()
+	for _, iTestCase := range testcases {
+		testcase, err := iTestCase.ToTestCase()
 		if err != nil {
 			panic(err)
 		}
-		task := b.convertBoomerTask(tcStruct)
+		task := b.convertBoomerTask(testcase)
 		taskSlice = append(taskSlice, task)
 	}
 	boomer.Run(taskSlice...)
diff --git a/convert.go b/convert.go
index 67c8b174..e22ad9cd 100644
--- a/convert.go
+++ b/convert.go
@@ -11,25 +11,24 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-func (tc *TestCase) toStruct() *TCase {
-	tcStruct := TCase{
+func (tc *TestCase) ToTCase() (*TCase, error) {
+	tCase := TCase{
 		Config: tc.Config,
 	}
 	for _, step := range tc.TestSteps {
-		tcStruct.TestSteps = append(tcStruct.TestSteps, step.ToStruct())
+		tCase.TestSteps = append(tCase.TestSteps, step.ToStruct())
 	}
-	return &tcStruct
+	return &tCase, nil
 }
 
-func (tc *TestCase) dump2JSON(path string) error {
+func (tc *TCase) Dump2JSON(path string) error {
 	path, err := filepath.Abs(path)
 	if err != nil {
 		log.Printf("convert absolute path error: %v, path: %v", err, path)
 		return err
 	}
 	log.Printf("dump testcase to json path: %s", path)
-	tcStruct := tc.toStruct()
-	file, _ := json.MarshalIndent(tcStruct, "", "    ")
+	file, _ := json.MarshalIndent(tc, "", "    ")
 	err = ioutil.WriteFile(path, file, 0644)
 	if err != nil {
 		log.Printf("dump json path error: %v", err)
@@ -38,7 +37,7 @@ func (tc *TestCase) dump2JSON(path string) error {
 	return nil
 }
 
-func (tc *TestCase) dump2YAML(path string) error {
+func (tc *TCase) Dump2YAML(path string) error {
 	path, err := filepath.Abs(path)
 	if err != nil {
 		log.Printf("convert absolute path error: %v, path: %v", err, path)
@@ -52,8 +51,7 @@ func (tc *TestCase) dump2YAML(path string) error {
 	encoder.SetIndent(4)
 
 	// encode
-	tcStruct := tc.toStruct()
-	err = encoder.Encode(tcStruct)
+	err = encoder.Encode(tc)
 	if err != nil {
 		return err
 	}
@@ -106,7 +104,7 @@ func loadFromYAML(path string) (*TCase, error) {
 	return tc, err
 }
 
-func convertTestCase(tc *TCase) (*TestCase, error) {
+func (tc *TCase) ToTestCase() (*TestCase, error) {
 	testCase := &TestCase{
 		Config: tc.Config,
 	}
@@ -128,7 +126,7 @@ func convertTestCase(tc *TCase) (*TestCase, error) {
 
 var ErrUnsupportedFileExt = fmt.Errorf("unsupported testcase file extension")
 
-func loadTestFile(path *TestCasePath) (*TestCase, error) {
+func (path *TestCasePath) ToTestCase() (*TestCase, error) {
 	var tc *TCase
 	var err error
 
@@ -145,9 +143,17 @@ func loadTestFile(path *TestCasePath) (*TestCase, error) {
 	if err != nil {
 		return nil, err
 	}
-	testcase, err := convertTestCase(tc)
+	testcase, err := tc.ToTestCase()
 	if err != nil {
 		return nil, err
 	}
 	return testcase, nil
 }
+
+func (path *TestCasePath) ToTCase() (*TCase, error) {
+	testcase, err := path.ToTestCase()
+	if err != nil {
+		return nil, err
+	}
+	return testcase.ToTCase()
+}
diff --git a/convert_test.go b/convert_test.go
index b4737f91..29f26b7a 100644
--- a/convert_test.go
+++ b/convert_test.go
@@ -56,12 +56,13 @@ var (
 )
 
 func TestMain(m *testing.M) {
+	tCase, _ := demoTestCase.ToTCase()
 	// setup, prepare demo json/yaml testcase file path
-	err := demoTestCase.dump2JSON(demoTestCaseJSONPath)
+	err := tCase.Dump2JSON(demoTestCaseJSONPath)
 	if err != nil {
 		os.Exit(1)
 	}
-	err = demoTestCase.dump2YAML(demoTestCaseYAMLPath)
+	err = tCase.Dump2YAML(demoTestCaseYAMLPath)
 	if err != nil {
 		os.Exit(1)
 	}
@@ -118,7 +119,7 @@ func TestLoadYAMLCase(t *testing.T) {
 
 func TestLoadJSONAndRun(t *testing.T) {
 	jsonPath := &TestCasePath{demoTestCaseJSONPath}
-	testcase, err := loadTestFile(jsonPath)
+	testcase, err := jsonPath.ToTestCase()
 	if !assert.NoError(t, err) {
 		t.Fail()
 	}
diff --git a/models.go b/models.go
index a8fc8a54..11268c41 100644
--- a/models.go
+++ b/models.go
@@ -68,7 +68,8 @@ type IStep interface {
 }
 
 type ITestCase interface {
-	ToStruct() (*TestCase, error)
+	ToTestCase() (*TestCase, error)
+	ToTCase() (*TCase, error)
 }
 
 // used for testcase runner
@@ -77,7 +78,7 @@ type TestCase struct {
 	TestSteps []IStep
 }
 
-func (tc *TestCase) ToStruct() (*TestCase, error) {
+func (tc *TestCase) ToTestCase() (*TestCase, error) {
 	return tc, nil
 }
 
@@ -85,14 +86,6 @@ type TestCasePath struct {
 	Path string
 }
 
-func (path *TestCasePath) ToStruct() (*TestCase, error) {
-	testcase, err := loadTestFile(path)
-	if err != nil {
-		return nil, err
-	}
-	return testcase, nil
-}
-
 type TestCaseSummary struct{}
 
 type StepData struct {
diff --git a/runner.go b/runner.go
index cd8bcd34..3e593076 100644
--- a/runner.go
+++ b/runner.go
@@ -38,13 +38,13 @@ func (r *Runner) SetDebug(debug bool) *Runner {
 }
 
 func (r *Runner) Run(testcases ...ITestCase) error {
-	for _, testcase := range testcases {
-		tcStruct, err := testcase.ToStruct()
+	for _, iTestCase := range testcases {
+		testcase, err := iTestCase.ToTestCase()
 		if err != nil {
 			log.Printf("[Run] testcase.ToStruct() error: %v", err)
 			return err
 		}
-		if err := r.runCase(tcStruct); err != nil {
+		if err := r.runCase(testcase); err != nil {
 			log.Printf("[Run] runCase error: %v", err)
 			return err
 		}