Drop the util package.

pkg/fs/fakefs.go

@@ -0,0 +1,80 @@
+/*
+Copyright 2018 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 fs
+
+import (
+	"fmt"
+	"os"
+)
+
+var _ FileSystem = &FakeFS{}
+
+// FakeFS implements FileSystem using a fake in-memory filesystem.
+type FakeFS struct {
+	m map[string]*FakeFile
+}
+
+// MakeFakeFS returns an instance of FakeFS with no files in it.
+func MakeFakeFS() *FakeFS {
+	return &FakeFS{m: map[string]*FakeFile{}}
+}
+
+// Create assures a fake file appears in the in-memory file system.
+func (fs *FakeFS) Create(name string) (File, error) {
+	f := &FakeFile{}
+	f.open = true
+	fs.m[name] = f
+	return fs.m[name], nil
+}
+
+// Mkdir assures a fake directory appears in the in-memory file system.
+func (fs *FakeFS) Mkdir(name string, perm os.FileMode) error {
+	fs.m[name] = makeDir(name)
+	return nil
+}
+
+// Open returns a fake file in the open state.
+func (fs *FakeFS) Open(name string) (File, error) {
+	if _, found := fs.m[name]; !found {
+		return nil, fmt.Errorf("file %q cannot be opened", name)
+	}
+	return fs.m[name], nil
+}
+
+// Stat always returns nil FileInfo, and returns an error if file does not exist.
+func (fs *FakeFS) Stat(name string) (os.FileInfo, error) {
+	if f, found := fs.m[name]; found {
+		return &Fakefileinfo{f}, nil
+	}
+	return nil, fmt.Errorf("file %q does not exist", name)
+}
+
+// ReadFile always returns an empty bytes and error depending on content of m.
+func (fs *FakeFS) ReadFile(name string) ([]byte, error) {
+	if ff, found := fs.m[name]; found {
+		return ff.content, nil
+	}
+	return nil, fmt.Errorf("cannot read file %q", name)
+}
+
+// WriteFile always succeeds and does nothing.
+func (fs *FakeFS) WriteFile(name string, c []byte) error {
+	ff := &FakeFile{}
+	ff.Write(c)
+	fs.m[name] = ff
+	return nil
+}