use fake filesystem to test key file flag for ark restic init-repo

Signed-off-by: Steve Kriss <steve@heptio.com>

pkg/util/filesystem/file_system.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2017 the Heptio Ark contributors.
+
+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 filesystem
+
+import (
+	"io"
+	"io/ioutil"
+	"os"
+)
+
+// Interface defines methods for interacting with an
+// underlying file system.
+type Interface interface {
+	TempDir(dir, prefix string) (string, error)
+	MkdirAll(path string, perm os.FileMode) error
+	Create(name string) (io.WriteCloser, error)
+	RemoveAll(path string) error
+	ReadDir(dirname string) ([]os.FileInfo, error)
+	ReadFile(filename string) ([]byte, error)
+	DirExists(path string) (bool, error)
+}
+
+func NewFileSystem() Interface {
+	return &osFileSystem{}
+}
+
+type osFileSystem struct{}
+
+func (fs *osFileSystem) TempDir(dir, prefix string) (string, error) {
+	return ioutil.TempDir(dir, prefix)
+}
+
+func (fs *osFileSystem) MkdirAll(path string, perm os.FileMode) error {
+	return os.MkdirAll(path, perm)
+}
+
+func (fs *osFileSystem) Create(name string) (io.WriteCloser, error) {
+	return os.Create(name)
+}
+
+func (fs *osFileSystem) RemoveAll(path string) error {
+	return os.RemoveAll(path)
+}
+
+func (fs *osFileSystem) ReadDir(dirname string) ([]os.FileInfo, error) {
+	return ioutil.ReadDir(dirname)
+}
+
+func (fs *osFileSystem) ReadFile(filename string) ([]byte, error) {
+	return ioutil.ReadFile(filename)
+}
+
+func (fs *osFileSystem) DirExists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}

pkg/util/test/fake_file_system.go

@@ -0,0 +1,70 @@
+package test
+
+import (
+	"io"
+	"os"
+
+	"github.com/spf13/afero"
+)
+
+type FakeFileSystem struct {
+	fs afero.Fs
+
+	ReadDirCalls []string
+}
+
+func NewFakeFileSystem() *FakeFileSystem {
+	return &FakeFileSystem{
+		fs: afero.NewMemMapFs(),
+	}
+}
+
+func (fs *FakeFileSystem) TempDir(dir, prefix string) (string, error) {
+	return afero.TempDir(fs.fs, dir, prefix)
+}
+
+func (fs *FakeFileSystem) MkdirAll(path string, perm os.FileMode) error {
+	return fs.fs.MkdirAll(path, perm)
+}
+
+func (fs *FakeFileSystem) Create(name string) (io.WriteCloser, error) {
+	return fs.fs.Create(name)
+}
+
+func (fs *FakeFileSystem) RemoveAll(path string) error {
+	return fs.fs.RemoveAll(path)
+}
+
+func (fs *FakeFileSystem) ReadDir(dirname string) ([]os.FileInfo, error) {
+	fs.ReadDirCalls = append(fs.ReadDirCalls, dirname)
+	return afero.ReadDir(fs.fs, dirname)
+}
+
+func (fs *FakeFileSystem) ReadFile(filename string) ([]byte, error) {
+	return afero.ReadFile(fs.fs, filename)
+}
+
+func (fs *FakeFileSystem) DirExists(path string) (bool, error) {
+	return afero.DirExists(fs.fs, path)
+}
+
+func (fs *FakeFileSystem) WithFile(path string, data []byte) *FakeFileSystem {
+	file, _ := fs.fs.Create(path)
+	file.Write(data)
+	file.Close()
+
+	return fs
+}
+
+func (fs *FakeFileSystem) WithDirectory(path string) *FakeFileSystem {
+	fs.fs.MkdirAll(path, 0755)
+	return fs
+}
+
+func (fs *FakeFileSystem) WithDirectories(path ...string) *FakeFileSystem {
+	for _, dir := range path {
+		fs = fs.WithDirectory(dir)
+	}
+
+	return fs
+}