package understanding_test

import (
    "path/filepath"
    "testing"
)

func TestFilepathJoin(t *testing.T) {
    if filepath.Join("a", "/b") != "a/b" {
        t.Errorf("incorrect stdlib understanding")
    }

    if filepath.Join("a", "../b") != "b" {
        t.Errorf("incorrect stdlib understanding")
    }

    if filepath.Join("a", filepath.Join("/", "../b")) != "a/b" {
        t.Errorf("incorrect stdlib understanding")
    }
}