c:\Users\Alex\dev\src\a2>type path_test.go
package filepath_test

import (
        "io/ioutil"
        "os"
        "path/filepath"
        "testing"
)

// simpleJoin builds a file name from the directory and path.
// It does not use Join because we don't want ".." to be evaluated.
func simpleJoin(dir, path string) string {
        return dir + string(filepath.Separator) + path
}

func TestEvalSymlink(t *testing.T) {
        tmpDir, err := ioutil.TempDir("", "TestEvalSymlink")
        if err != nil {
                t.Fatal(err)
        }
        defer os.RemoveAll(tmpDir)

        err = os.MkdirAll(simpleJoin(tmpDir, "test/dir"), 0755)
        if err != nil {
                t.Fatal(err)
        }
        err = os.Symlink("../test", simpleJoin(tmpDir, "test/link1"))
        if err != nil {
                t.Fatal(err)
        }

        cwd, err := os.Getwd()
        if err != nil {
                t.Fatal(err)
        }
        defer func() {
                err := os.Chdir(cwd)
                if err != nil {
                        t.Fatal(err)
                }
        }()

        wd := simpleJoin(tmpDir, "test/link1")
        err = os.Chdir(wd)
        if err != nil {
                t.Fatal(err)
        }

        path := simpleJoin("..", "test")
        have, err := filepath.EvalSymlinks(path)
        if err != nil {
                t.Errorf("EvalSymlinks(%q) in %q directory error: %v", path, wd, err)
                return
        }
        want := simpleJoin("..", "test")
        if filepath.Clean(have) != filepath.Clean(want) {
                t.Errorf("EvalSymlinks(%q) in %q directory returns %q, want %q", path, wd, have, want)
        }
}

c:\Users\Alex\dev\src\a2>go test
--- FAIL: TestEvalSymlink (0.00s)
        path_test.go:52: EvalSymlinks("..\\test") in "C:\\Users\\Alex\\AppData\\Local\\Temp\\TestEvalSymlink279508299\\test/link1" directory error: GetFileAttributesEx ..\test: The system cannot find the file specified.
FAIL
exit status 1
FAIL    a2      0.035s

c:\Users\Alex\dev\src\a2>