1 files changed, 81 insertions, 0 deletions
diff --git a/internal/windows/windows_test.go b/internal/windows/windows_test.go
new file mode 100644
index 0000000..3caf54c
--- /dev/null
+++ b/internal/windows/windows_test.go
@@ -0,0 +1,81 @@
+// Copyright 2021 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package windows
+
+import (
+	"archive/tar"
+	"errors"
+	"io"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/google/go-containerregistry/pkg/v1/tarball"
+)
+
+func TestWindows(t *testing.T) {
+	tarLayer, err := tarball.LayerFromFile("../../pkg/v1/tarball/testdata/content.tar")
+	if err != nil {
+		t.Fatalf("Unable to create layer from tar file: %v", err)
+	}
+
+	win, err := Windows(tarLayer)
+	if err != nil {
+		t.Fatalf("Windows: %v", err)
+	}
+	if _, err := Windows(win); err == nil {
+		t.Error("expected an error double-Windowsifying a layer; got nil")
+	}
+
+	rc, err := win.Uncompressed()
+	if err != nil {
+		t.Fatalf("Uncompressed: %v", err)
+	}
+	defer rc.Close()
+	tr := tar.NewReader(rc)
+	var sawHives, sawFiles bool
+	for {
+		h, err := tr.Next()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		if h.Name == "Hives" && h.Typeflag == tar.TypeDir {
+			sawHives = true
+			continue
+		}
+		if h.Name == "Files" && h.Typeflag == tar.TypeDir {
+			sawFiles = true
+			continue
+		}
+		if !strings.HasPrefix(h.Name, "Files/") {
+			t.Errorf("tar entry %q didn't have Files prefix", h.Name)
+		}
+		if h.Format != tar.FormatPAX {
+			t.Errorf("tar entry %q had unexpected Format; got %v, want %v", h.Name, h.Format, tar.FormatPAX)
+		}
+		want := map[string]string{
+			"MSWINDOWS.rawsd": userOwnerAndGroupSID,
+		}
+		if !reflect.DeepEqual(h.PAXRecords, want) {
+			t.Errorf("tar entry %q: got %v, want %v", h.Name, h.PAXRecords, want)
+		}
+	}
+	if !sawHives {
+		t.Errorf("didn't see Hives/ directory")
+	}
+	if !sawFiles {
+		t.Errorf("didn't see Files/ directory")
+	}
+}