Add UT for util/pkg/vfs/memfs.go

util/pkg/vfs/BUILD.bazel

@@ -57,6 +57,7 @@ go_test(
     name = "go_default_test",
     srcs = [
         "fs_test.go",
+        "memfs_test.go",
         "s3context_test.go",
         "s3fs_test.go",
     ],

util/pkg/vfs/memfs_test.go

@@ -0,0 +1,165 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+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 vfs
+
+import (
+	"bytes"
+	"os"
+	"reflect"
+	"sort"
+	"testing"
+)
+
+func TestMemFsCreateFile(t *testing.T) {
+	tests := []struct {
+		path string
+		data []byte
+	}{
+		{
+			path: "/root/subdir/test1.data",
+			data: []byte("test data\nline 1\r\nline 2"),
+		},
+	}
+	for _, test := range tests {
+		memfspath := NewMemFSPath(NewMemFSContext(), test.path)
+		// Create file
+		err := memfspath.CreateFile(bytes.NewReader(test.data), nil)
+		if err != nil {
+			t.Errorf("Failed writing path %s, error: %v", test.path, err)
+			continue
+		}
+
+		// Create file again should result in error
+		err = memfspath.CreateFile(bytes.NewReader([]byte("data")), nil)
+		if err != os.ErrExist {
+			t.Errorf("Expected to get os.ErrExist, got: %v", err)
+		}
+
+		// Check file content
+		data, err := memfspath.ReadFile()
+		if err != nil {
+			t.Errorf("Failed reading path %s, error: %v", test.path, err)
+			continue
+		}
+		if !bytes.Equal(data, test.data) {
+			t.Errorf("Expected path content %v, got %v", test.data, data)
+		}
+	}
+}
+
+func TestMemFsReadDir(t *testing.T) {
+	tests := []struct {
+		path     string
+		subpaths []string
+		expected []string
+	}{
+		{
+			path: "/root/",
+			subpaths: []string{
+				"subdir/",
+				"subdir2/",
+				"subdir2/test.data",
+			},
+			expected: []string{
+				"/root/subdir/",
+				"/root/subdir2/",
+			},
+		},
+	}
+	for _, test := range tests {
+		context := NewMemFSContext()
+		memfspath := NewMemFSPath(context, test.path)
+
+		// Create sub-paths
+		for _, subpath := range test.subpaths {
+			memfspath.Join(subpath)
+		}
+
+		// Read dir
+		paths, err := memfspath.ReadDir()
+		if err != nil {
+			t.Errorf("Failed reading dir %s, error: %v", test.path, err)
+			continue
+		}
+
+		// There is no consistent alphabetical order in the result, so we sort it
+		sort.Slice(paths, func(i, j int) bool {
+			return paths[i].Path() < paths[j].Path()
+		})
+		// Expected sub-paths
+		count := len(test.expected)
+		expected := make([]Path, count)
+		for i := 0; i < count; i++ {
+			expected[i] = NewMemFSPath(context, test.expected[i])
+		}
+		if !reflect.DeepEqual(paths, expected) {
+			t.Errorf("Expected sub-paths %v, got %v", expected, paths)
+		}
+	}
+}
+
+func TestMemFsReadTree(t *testing.T) {
+	tests := []struct {
+		path     string
+		subpaths []string
+		expected []string
+	}{
+		{
+			path: "/root/dir/",
+			subpaths: []string{
+				"subdir/",
+				"subdir/test1.data",
+				"subdir2/",
+				"subdir2/test2.data",
+			},
+			expected: []string{
+				"/root/dir/subdir/test1.data",
+				"/root/dir/subdir2/test2.data",
+			},
+		},
+	}
+	for _, test := range tests {
+		context := NewMemFSContext()
+		memfspath := NewMemFSPath(context, test.path)
+
+		// Create sub-paths
+		for _, subpath := range test.subpaths {
+			memfspath.Join(subpath)
+		}
+
+		// Read dir tree
+		paths, err := memfspath.ReadTree()
+		if err != nil {
+			t.Errorf("Failed reading dir tree %s, error: %v", test.path, err)
+			continue
+		}
+
+		// There is no consistent alphabetical order in the result, so we sort it
+		sort.Slice(paths, func(i, j int) bool {
+			return paths[i].Path() < paths[j].Path()
+		})
+		// Expected sub-paths
+		count := len(test.expected)
+		expected := make([]Path, count)
+		for i := 0; i < count; i++ {
+			expected[i] = NewMemFSPath(context, test.expected[i])
+		}
+		if !reflect.DeepEqual(paths, expected) {
+			t.Errorf("Expected tree paths %v, got %v", expected, paths)
+		}
+	}
+}