diff --git a/debug/gdebug/gdebug_testdata.go b/debug/gdebug/gdebug_testdata.go
index 2d258d5d2..d16705f39 100644
--- a/debug/gdebug/gdebug_testdata.go
+++ b/debug/gdebug/gdebug_testdata.go
@@ -10,10 +10,10 @@ import (
 	"path/filepath"
 )
 
-// TestDataPath retrieves and returns the testdata path of current package.
-// It is used for unit testing cases only.
-// The parameter <names> specifies the underlying sub-folders/sub-files,
-// which will be joined with current system separator.
+// TestDataPath retrieves and returns the testdata path of current package,
+// which is used for unit testing cases only.
+// The parameter <names> specifies the its sub-folders/sub-files,
+// which will be joined with current system separator and returned with the path.
 func TestDataPath(names ...string) string {
 	path := CallerDirectory() + string(filepath.Separator) + "testdata"
 	for _, name := range names {
diff --git a/encoding/gbase64/gbase64_test.go b/encoding/gbase64/gbase64_test.go
index 70e1d89bd..8286b648e 100644
--- a/encoding/gbase64/gbase64_test.go
+++ b/encoding/gbase64/gbase64_test.go
@@ -67,7 +67,7 @@ func Test_Basic(t *testing.T) {
 }
 
 func Test_File(t *testing.T) {
-	path := gfile.Join(gdebug.TestDataPath(), "test")
+	path := gdebug.TestDataPath("test")
 	expect := "dGVzdA=="
 	gtest.C(t, func(t *gtest.T) {
 		b, err := gbase64.EncodeFile(path)
diff --git a/encoding/gcompress/gcompress_z_unit_gzip_test.go b/encoding/gcompress/gcompress_z_unit_gzip_test.go
index 2acf033a3..2e43558fa 100644
--- a/encoding/gcompress/gcompress_z_unit_gzip_test.go
+++ b/encoding/gcompress/gcompress_z_unit_gzip_test.go
@@ -43,7 +43,7 @@ func Test_Gzip_UnGzip(t *testing.T) {
 }
 
 func Test_Gzip_UnGzip_File(t *testing.T) {
-	srcPath := gfile.Join(gdebug.TestDataPath(), "gzip", "file.txt")
+	srcPath := gdebug.TestDataPath("gzip", "file.txt")
 	dstPath1 := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), "gzip.zip")
 	dstPath2 := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), "file.txt")
 
diff --git a/encoding/gcompress/gcompress_z_unit_zip_test.go b/encoding/gcompress/gcompress_z_unit_zip_test.go
index 5aa447260..757675b20 100644
--- a/encoding/gcompress/gcompress_z_unit_zip_test.go
+++ b/encoding/gcompress/gcompress_z_unit_zip_test.go
@@ -20,8 +20,8 @@ import (
 func Test_ZipPath(t *testing.T) {
 	// file
 	gtest.C(t, func(t *gtest.T) {
-		srcPath := gfile.Join(gdebug.TestDataPath(), "zip", "path1", "1.txt")
-		dstPath := gfile.Join(gdebug.TestDataPath(), "zip", "zip.zip")
+		srcPath := gdebug.TestDataPath("zip", "path1", "1.txt")
+		dstPath := gdebug.TestDataPath("zip", "zip.zip")
 
 		t.Assert(gfile.Exists(dstPath), false)
 		err := gcompress.ZipPath(srcPath, dstPath)
@@ -44,8 +44,8 @@ func Test_ZipPath(t *testing.T) {
 	})
 	// directory
 	gtest.C(t, func(t *gtest.T) {
-		srcPath := gfile.Join(gdebug.TestDataPath(), "zip")
-		dstPath := gfile.Join(gdebug.TestDataPath(), "zip", "zip.zip")
+		srcPath := gdebug.TestDataPath("zip")
+		dstPath := gdebug.TestDataPath("zip", "zip.zip")
 
 		pwd := gfile.Pwd()
 		err := gfile.Chdir(srcPath)
@@ -77,10 +77,10 @@ func Test_ZipPath(t *testing.T) {
 	})
 	// multiple paths joined using char ','
 	gtest.C(t, func(t *gtest.T) {
-		srcPath := gfile.Join(gdebug.TestDataPath(), "zip")
-		srcPath1 := gfile.Join(gdebug.TestDataPath(), "zip", "path1")
-		srcPath2 := gfile.Join(gdebug.TestDataPath(), "zip", "path2")
-		dstPath := gfile.Join(gdebug.TestDataPath(), "zip", "zip.zip")
+		srcPath := gdebug.TestDataPath("zip")
+		srcPath1 := gdebug.TestDataPath("zip", "path1")
+		srcPath2 := gdebug.TestDataPath("zip", "path2")
+		dstPath := gdebug.TestDataPath("zip", "zip.zip")
 
 		pwd := gfile.Pwd()
 		err := gfile.Chdir(srcPath)
@@ -116,9 +116,9 @@ func Test_ZipPath(t *testing.T) {
 
 func Test_ZipPathWriter(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		srcPath := gfile.Join(gdebug.TestDataPath(), "zip")
-		srcPath1 := gfile.Join(gdebug.TestDataPath(), "zip", "path1")
-		srcPath2 := gfile.Join(gdebug.TestDataPath(), "zip", "path2")
+		srcPath := gdebug.TestDataPath("zip")
+		srcPath1 := gdebug.TestDataPath("zip", "path1")
+		srcPath2 := gdebug.TestDataPath("zip", "path2")
 
 		pwd := gfile.Pwd()
 		err := gfile.Chdir(srcPath)
diff --git a/encoding/gjson/gjson_z_example_load_test.go b/encoding/gjson/gjson_z_example_load_test.go
index d2acebb96..d8ea84a8d 100644
--- a/encoding/gjson/gjson_z_example_load_test.go
+++ b/encoding/gjson/gjson_z_example_load_test.go
@@ -14,14 +14,14 @@ import (
 )
 
 func Example_LoadJson() {
-	jsonFilePath := gfile.Join(gdebug.TestDataPath(), "json", "data1.json")
+	jsonFilePath := gdebug.TestDataPath("json", "data1.json")
 	j, _ := gjson.Load(jsonFilePath)
 	fmt.Println(j.Get("name"))
 	fmt.Println(j.Get("score"))
 }
 
 func Example_LoadXml() {
-	jsonFilePath := gfile.Join(gdebug.TestDataPath(), "xml", "data1.xml")
+	jsonFilePath := gdebug.TestDataPath("xml", "data1.xml")
 	j, _ := gjson.Load(jsonFilePath)
 	fmt.Println(j.Get("doc.name"))
 	fmt.Println(j.Get("doc.score"))
diff --git a/frame/gins/gins_z_unit_config_test.go b/frame/gins/gins_z_unit_config_test.go
index 0ba1cc54d..4e1bc4a6e 100644
--- a/frame/gins/gins_z_unit_config_test.go
+++ b/frame/gins/gins_z_unit_config_test.go
@@ -22,7 +22,7 @@ import (
 
 var (
 	configContent = gfile.GetContents(
-		gfile.Join(gdebug.TestDataPath(), "config", "config.toml"),
+		gdebug.TestDataPath("config", "config.toml"),
 	)
 )
 
diff --git a/frame/gins/gins_z_unit_database_test.go b/frame/gins/gins_z_unit_database_test.go
index b3a82a955..44ea6c22c 100644
--- a/frame/gins/gins_z_unit_database_test.go
+++ b/frame/gins/gins_z_unit_database_test.go
@@ -19,7 +19,7 @@ import (
 
 func Test_Database(t *testing.T) {
 	databaseContent := gfile.GetContents(
-		gfile.Join(gdebug.TestDataPath(), "database", "config.toml"),
+		gdebug.TestDataPath("database", "config.toml"),
 	)
 	gtest.C(t, func(t *gtest.T) {
 		var err error
diff --git a/frame/gins/gins_z_unit_redis_test.go b/frame/gins/gins_z_unit_redis_test.go
index a9fdc679e..0a7e6a86d 100644
--- a/frame/gins/gins_z_unit_redis_test.go
+++ b/frame/gins/gins_z_unit_redis_test.go
@@ -19,7 +19,7 @@ import (
 
 func Test_Redis(t *testing.T) {
 	redisContent := gfile.GetContents(
-		gfile.Join(gdebug.TestDataPath(), "redis", "config.toml"),
+		gdebug.TestDataPath("redis", "config.toml"),
 	)
 
 	gtest.C(t, func(t *gtest.T) {
diff --git a/frame/gins/gins_z_unit_view_test.go b/frame/gins/gins_z_unit_view_test.go
index c8f0cf34b..e03f398dd 100644
--- a/frame/gins/gins_z_unit_view_test.go
+++ b/frame/gins/gins_z_unit_view_test.go
@@ -52,7 +52,7 @@ func Test_View(t *testing.T) {
 func Test_View_Config(t *testing.T) {
 	// view1 test1
 	gtest.C(t, func(t *gtest.T) {
-		dirPath := gfile.Join(gdebug.TestDataPath(), "view1")
+		dirPath := gdebug.TestDataPath("view1")
 		gcfg.SetContent(gfile.GetContents(gfile.Join(dirPath, "config.toml")))
 		defer gcfg.ClearContent()
 		defer instances.Clear()
@@ -74,7 +74,7 @@ func Test_View_Config(t *testing.T) {
 	})
 	// view1 test2
 	gtest.C(t, func(t *gtest.T) {
-		dirPath := gfile.Join(gdebug.TestDataPath(), "view1")
+		dirPath := gdebug.TestDataPath("view1")
 		gcfg.SetContent(gfile.GetContents(gfile.Join(dirPath, "config.toml")))
 		defer gcfg.ClearContent()
 		defer instances.Clear()
@@ -96,7 +96,7 @@ func Test_View_Config(t *testing.T) {
 	})
 	// view2
 	gtest.C(t, func(t *gtest.T) {
-		dirPath := gfile.Join(gdebug.TestDataPath(), "view2")
+		dirPath := gdebug.TestDataPath("view2")
 		gcfg.SetContent(gfile.GetContents(gfile.Join(dirPath, "config.toml")))
 		defer gcfg.ClearContent()
 		defer instances.Clear()
@@ -118,7 +118,7 @@ func Test_View_Config(t *testing.T) {
 	})
 	// view2
 	gtest.C(t, func(t *gtest.T) {
-		dirPath := gfile.Join(gdebug.TestDataPath(), "view2")
+		dirPath := gdebug.TestDataPath("view2")
 		gcfg.SetContent(gfile.GetContents(gfile.Join(dirPath, "config.toml")))
 		defer gcfg.ClearContent()
 		defer instances.Clear()
diff --git a/net/ghttp/ghttp_unit_middleware_basic_test.go b/net/ghttp/ghttp_unit_middleware_basic_test.go
index 62f188b2f..7ce9420f2 100644
--- a/net/ghttp/ghttp_unit_middleware_basic_test.go
+++ b/net/ghttp/ghttp_unit_middleware_basic_test.go
@@ -178,7 +178,7 @@ func Test_Middleware_With_Static(t *testing.T) {
 	})
 	s.SetPort(p)
 	s.SetDumpRouterMap(false)
-	s.SetServerRoot(gfile.Join(gdebug.TestDataPath(), "static1"))
+	s.SetServerRoot(gdebug.TestDataPath("static1"))
 	s.Start()
 	defer s.Shutdown()
 	time.Sleep(100 * time.Millisecond)
@@ -250,7 +250,7 @@ func Test_Middleware_Hook_With_Static(t *testing.T) {
 	})
 	s.SetPort(p)
 	//s.SetDumpRouterMap(false)
-	s.SetServerRoot(gfile.Join(gdebug.TestDataPath(), "static1"))
+	s.SetServerRoot(gdebug.TestDataPath("static1"))
 	s.Start()
 	defer s.Shutdown()
 	time.Sleep(100 * time.Millisecond)
diff --git a/net/ghttp/ghttp_unit_param_file_test.go b/net/ghttp/ghttp_unit_param_file_test.go
index b21b5beb2..1d5b9ac2c 100644
--- a/net/ghttp/ghttp_unit_param_file_test.go
+++ b/net/ghttp/ghttp_unit_param_file_test.go
@@ -45,7 +45,7 @@ func Test_Params_File_Single(t *testing.T) {
 		client := ghttp.NewClient()
 		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", p))
 
-		srcPath := gfile.Join(gdebug.TestDataPath(), "upload", "file1.txt")
+		srcPath := gdebug.TestDataPath("upload", "file1.txt")
 		dstPath := gfile.Join(dstDirPath, "file1.txt")
 		content := client.PostContent("/upload/single", g.Map{
 			"file": "@file:" + srcPath,
@@ -61,7 +61,7 @@ func Test_Params_File_Single(t *testing.T) {
 		client := ghttp.NewClient()
 		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", p))
 
-		srcPath := gfile.Join(gdebug.TestDataPath(), "upload", "file2.txt")
+		srcPath := gdebug.TestDataPath("upload", "file2.txt")
 		content := client.PostContent("/upload/single", g.Map{
 			"file":           "@file:" + srcPath,
 			"randomlyRename": true,
@@ -98,7 +98,7 @@ func Test_Params_File_CustomName(t *testing.T) {
 		client := ghttp.NewClient()
 		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", p))
 
-		srcPath := gfile.Join(gdebug.TestDataPath(), "upload", "file1.txt")
+		srcPath := gdebug.TestDataPath("upload", "file1.txt")
 		dstPath := gfile.Join(dstDirPath, "my.txt")
 		content := client.PostContent("/upload/single", g.Map{
 			"file": "@file:" + srcPath,
@@ -135,8 +135,8 @@ func Test_Params_File_Batch(t *testing.T) {
 		client := ghttp.NewClient()
 		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", p))
 
-		srcPath1 := gfile.Join(gdebug.TestDataPath(), "upload", "file1.txt")
-		srcPath2 := gfile.Join(gdebug.TestDataPath(), "upload", "file2.txt")
+		srcPath1 := gdebug.TestDataPath("upload", "file1.txt")
+		srcPath2 := gdebug.TestDataPath("upload", "file2.txt")
 		dstPath1 := gfile.Join(dstDirPath, "file1.txt")
 		dstPath2 := gfile.Join(dstDirPath, "file2.txt")
 		content := client.PostContent("/upload/batch", g.Map{
@@ -155,8 +155,8 @@ func Test_Params_File_Batch(t *testing.T) {
 		client := ghttp.NewClient()
 		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", p))
 
-		srcPath1 := gfile.Join(gdebug.TestDataPath(), "upload", "file1.txt")
-		srcPath2 := gfile.Join(gdebug.TestDataPath(), "upload", "file2.txt")
+		srcPath1 := gdebug.TestDataPath("upload", "file1.txt")
+		srcPath2 := gdebug.TestDataPath("upload", "file2.txt")
 		content := client.PostContent("/upload/batch", g.Map{
 			"file[0]":        "@file:" + srcPath1,
 			"file[1]":        "@file:" + srcPath2,
diff --git a/net/ghttp/ghttp_unit_static_test.go b/net/ghttp/ghttp_unit_static_test.go
index 8cafbf169..f9ae39e87 100644
--- a/net/ghttp/ghttp_unit_static_test.go
+++ b/net/ghttp/ghttp_unit_static_test.go
@@ -66,7 +66,7 @@ func Test_Static_ServerRoot_Security(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		p := ports.PopRand()
 		s := g.Server(p)
-		s.SetServerRoot(gfile.Join(gdebug.TestDataPath(), "static1"))
+		s.SetServerRoot(gdebug.TestDataPath("static1"))
 		s.SetPort(p)
 		s.Start()
 		defer s.Shutdown()
diff --git a/net/ghttp/ghttp_unit_template_test.go b/net/ghttp/ghttp_unit_template_test.go
index d21dff079..75c6395f0 100644
--- a/net/ghttp/ghttp_unit_template_test.go
+++ b/net/ghttp/ghttp_unit_template_test.go
@@ -24,7 +24,7 @@ import (
 
 func Test_Template_Basic(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		v := gview.New(gfile.Join(gdebug.TestDataPath(), "template", "basic"))
+		v := gview.New(gdebug.TestDataPath("template", "basic"))
 		p := ports.PopRand()
 		s := g.Server(p)
 		s.SetView(v)
@@ -49,7 +49,7 @@ func Test_Template_Basic(t *testing.T) {
 
 func Test_Template_Encode(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		v := gview.New(gfile.Join(gdebug.TestDataPath(), "template", "basic"))
+		v := gview.New(gdebug.TestDataPath("template", "basic"))
 		v.SetAutoEncode(true)
 		p := ports.PopRand()
 		s := g.Server(p)
@@ -75,7 +75,7 @@ func Test_Template_Encode(t *testing.T) {
 
 func Test_Template_Layout1(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		v := gview.New(gfile.Join(gdebug.TestDataPath(), "template", "layout1"))
+		v := gview.New(gdebug.TestDataPath("template", "layout1"))
 		p := ports.PopRand()
 		s := g.Server(p)
 		s.SetView(v)
@@ -105,7 +105,7 @@ func Test_Template_Layout1(t *testing.T) {
 
 func Test_Template_Layout2(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		v := gview.New(gfile.Join(gdebug.TestDataPath(), "template", "layout2"))
+		v := gview.New(gdebug.TestDataPath("template", "layout2"))
 		p := ports.PopRand()
 		s := g.Server(p)
 		s.SetView(v)
diff --git a/os/gview/gview_unit_config_test.go b/os/gview/gview_unit_config_test.go
index cb2e764c1..e901f69bf 100644
--- a/os/gview/gview_unit_config_test.go
+++ b/os/gview/gview_unit_config_test.go
@@ -18,7 +18,7 @@ import (
 func Test_Config(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		config := gview.Config{
-			Paths: []string{gfile.Join(gdebug.TestDataPath(), "config")},
+			Paths: []string{gdebug.TestDataPath("config")},
 			Data: g.Map{
 				"name": "gf",
 			},
@@ -45,7 +45,7 @@ func Test_ConfigWithMap(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		view := gview.New()
 		err := view.SetConfigWithMap(g.Map{
-			"Paths":       []string{gfile.Join(gdebug.TestDataPath(), "config")},
+			"Paths":       []string{gdebug.TestDataPath("config")},
 			"DefaultFile": "test.html",
 			"Delimiters":  []string{"${", "}"},
 			"Data": g.Map{