'ss'

fileutils/file_test.go

@@ -0,0 +1,46 @@
+package fileutils
+
+import "testing"
+
+func TestCommonPrefix(t *testing.T) {
+	testCases := map[string]struct {
+		paths []string
+		want  string
+	}{
+		"same lvl": {
+			paths: []string{
+				"/home/user/file1",
+				"/home/user/file2",
+			},
+			want: "/home/user",
+		},
+		"sub folder": {
+			paths: []string{
+				"/home/user/folder",
+				"/home/user/folder/file",
+			},
+			want: "/home/user/folder",
+		},
+		"relative path": {
+			paths: []string{
+				"/home/user/folder",
+				"/home/user/folder/../folder2",
+			},
+			want: "/home/user",
+		},
+		"no common path": {
+			paths: []string{
+				"/home/user/folder",
+				"/etc/file",
+			},
+			want: "",
+		},
+	}
+	for name, tt := range testCases {
+		t.Run(name, func(t *testing.T) {
+			if got := CommonPrefix('/', tt.paths...); got != tt.want {
+				t.Errorf("CommonPrefix() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}