fix breadcrumb

weed/server/filer_ui/breadcrumb.go

@@ -13,6 +13,9 @@ type Breadcrumb struct {
 
 func ToBreadcrumb(fullpath string) (crumbs []Breadcrumb) {
 	parts := strings.Split(fullpath, "/")
+	if fullpath == "/" {
+		parts = []string{""}
+	}
 
 	for i := 0; i < len(parts); i++ {
 		name := parts[i]

weed/server/filer_ui/breadcrumb_test.go

@@ -0,0 +1,74 @@
+package filer_ui
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestToBreadcrumb(t *testing.T) {
+	type args struct {
+		fullpath string
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantCrumbs []Breadcrumb
+	}{
+		{
+			name: "test1",
+			args: args{
+				fullpath: "/",
+			},
+			wantCrumbs: []Breadcrumb{
+				{
+					Name: "/",
+					Link: "/",
+				},
+			},
+		},
+		{
+			name: "test2",
+			args: args{
+				fullpath: "/abc",
+			},
+			wantCrumbs: []Breadcrumb{
+				{
+					Name: "/",
+					Link: "/",
+				},
+				{
+					Name: "abc",
+					Link: "/abc/",
+				},
+			},
+		},
+		{
+			name: "test3",
+			args: args{
+				fullpath: "/abc/def",
+			},
+			wantCrumbs: []Breadcrumb{
+				{
+					Name: "/",
+					Link: "/",
+				},
+				{
+					Name: "abc",
+					Link: "/abc/",
+				},
+				{
+					Name: "def",
+					Link: "/abc/def/",
+				},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if gotCrumbs := ToBreadcrumb(tt.args.fullpath); !reflect.DeepEqual(gotCrumbs, tt.wantCrumbs) {
+				t.Errorf("ToBreadcrumb() = %v, want %v", gotCrumbs, tt.wantCrumbs)
+			}
+		})
+	}
+}