1 files changed, 128 insertions, 0 deletions
diff --git a/src/os/path_test.go b/src/os/path_test.go
new file mode 100644
index 0000000..b79d958
--- /dev/null
+++ b/src/os/path_test.go
@@ -0,0 +1,128 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package os_test
+
+import (
+	"internal/testenv"
+	"os"
+	. "os"
+	"path/filepath"
+	"runtime"
+	"syscall"
+	"testing"
+)
+
+var isReadonlyError = func(error) bool { return false }
+
+func TestMkdirAll(t *testing.T) {
+	tmpDir := TempDir()
+	path := tmpDir + "/_TestMkdirAll_/dir/./dir2"
+	err := MkdirAll(path, 0777)
+	if err != nil {
+		t.Fatalf("MkdirAll %q: %s", path, err)
+	}
+	defer RemoveAll(tmpDir + "/_TestMkdirAll_")
+
+	// Already exists, should succeed.
+	err = MkdirAll(path, 0777)
+	if err != nil {
+		t.Fatalf("MkdirAll %q (second time): %s", path, err)
+	}
+
+	// Make file.
+	fpath := path + "/file"
+	f, err := Create(fpath)
+	if err != nil {
+		t.Fatalf("create %q: %s", fpath, err)
+	}
+	defer f.Close()
+
+	// Can't make directory named after file.
+	err = MkdirAll(fpath, 0777)
+	if err == nil {
+		t.Fatalf("MkdirAll %q: no error", fpath)
+	}
+	perr, ok := err.(*PathError)
+	if !ok {
+		t.Fatalf("MkdirAll %q returned %T, not *PathError", fpath, err)
+	}
+	if filepath.Clean(perr.Path) != filepath.Clean(fpath) {
+		t.Fatalf("MkdirAll %q returned wrong error path: %q not %q", fpath, filepath.Clean(perr.Path), filepath.Clean(fpath))
+	}
+
+	// Can't make subdirectory of file.
+	ffpath := fpath + "/subdir"
+	err = MkdirAll(ffpath, 0777)
+	if err == nil {
+		t.Fatalf("MkdirAll %q: no error", ffpath)
+	}
+	perr, ok = err.(*PathError)
+	if !ok {
+		t.Fatalf("MkdirAll %q returned %T, not *PathError", ffpath, err)
+	}
+	if filepath.Clean(perr.Path) != filepath.Clean(fpath) {
+		t.Fatalf("MkdirAll %q returned wrong error path: %q not %q", ffpath, filepath.Clean(perr.Path), filepath.Clean(fpath))
+	}
+
+	if runtime.GOOS == "windows" {
+		path := tmpDir + `\_TestMkdirAll_\dir\.\dir2\`
+		err := MkdirAll(path, 0777)
+		if err != nil {
+			t.Fatalf("MkdirAll %q: %s", path, err)
+		}
+	}
+}
+
+func TestMkdirAllWithSymlink(t *testing.T) {
+	testenv.MustHaveSymlink(t)
+
+	tmpDir, err := os.MkdirTemp("", "TestMkdirAllWithSymlink-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer RemoveAll(tmpDir)
+
+	dir := tmpDir + "/dir"
+	err = Mkdir(dir, 0755)
+	if err != nil {
+		t.Fatalf("Mkdir %s: %s", dir, err)
+	}
+
+	link := tmpDir + "/link"
+	err = Symlink("dir", link)
+	if err != nil {
+		t.Fatalf("Symlink %s: %s", link, err)
+	}
+
+	path := link + "/foo"
+	err = MkdirAll(path, 0755)
+	if err != nil {
+		t.Errorf("MkdirAll %q: %s", path, err)
+	}
+}
+
+func TestMkdirAllAtSlash(t *testing.T) {
+	switch runtime.GOOS {
+	case "android", "plan9", "windows":
+		t.Skipf("skipping on %s", runtime.GOOS)
+	case "darwin", "ios":
+		switch runtime.GOARCH {
+		case "arm64":
+			t.Skipf("skipping on darwin/arm64, mkdir returns EPERM")
+		}
+	}
+	RemoveAll("/_go_os_test")
+	const dir = "/_go_os_test/dir"
+	err := MkdirAll(dir, 0777)
+	if err != nil {
+		pathErr, ok := err.(*PathError)
+		// common for users not to be able to write to /
+		if ok && (pathErr.Err == syscall.EACCES || isReadonlyError(pathErr.Err)) {
+			t.Skipf("could not create %v: %v", dir, err)
+		}
+		t.Fatalf(`MkdirAll "/_go_os_test/dir": %v, %s`, err, pathErr.Err)
+	}
+	RemoveAll("/_go_os_test")
+}