fix bug in windows (#5844)

* fix bug in windows

* fix file name bug

* test in unix like platform

utils/utils.go

@@ -27,7 +27,7 @@ func sourceDir(file string) string {
 	if filepath.Base(s) != "gorm.io" {
 		s = dir
 	}
-	return s + string(filepath.Separator)
+	return filepath.ToSlash(s) + "/"
 }
 
 // FileWithLineNum return the file name and line number of the current file

utils/utils_unix_test.go

@@ -1,6 +1,11 @@
+//go:build unix
+// +build unix
+
 package utils
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestSourceDir(t *testing.T) {
 	cases := []struct {

utils/utils_windows_test.go

@@ -1,27 +1,29 @@
 package utils
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestSourceDir(t *testing.T) {
 	cases := []struct {
 		file string
 		want string
 	}{
 		{
-			file: `C:\Users\name\go\pkg\mod\gorm.io\gorm@v1.20.8\utils\utils.go`,
-			want: `C:\Users\name\go\pkg\mod\gorm.io`,
+			file: `C:/Users/name/go/pkg/mod/gorm.io/gorm@v1.2.3/utils/utils.go`,
+			want: `C:/Users/name/go/pkg/mod/gorm.io/`,
 		},
 		{
-			file: `C:\go\work\proj\gorm\utils\utils.go`,
-			want: `C:\go\work\proj\gorm`,
+			file: `C:/go/work/proj/gorm/utils/utils.go`,
+			want: `C:/go/work/proj/gorm/`,
 		},
 		{
-			file: `C:\go\work\proj\gorm_alias\utils\utils.go`,
-			want: `C:\go\work\proj\gorm_alias`,
+			file: `C:/go/work/proj/gorm_alias/utils/utils.go`,
+			want: `C:/go/work/proj/gorm_alias/`,
 		},
 		{
-			file: `C:\go\work\proj\my.gorm.io\gorm\utils\utils.go`,
-			want: `C:\go\work\proj\my.gorm.io\gorm`,
+			file: `C:/go/work/proj/my.gorm.io/gorm@v1.2.3/utils/utils.go`,
+			want: `C:/go/work/proj/my.gorm.io/gorm@v1.2.3/`,
 		},
 	}
 	for _, c := range cases {