d7b0f60802
Tests can call Context.MockFileSystem to pass in a map of filenames to contents. Change-Id: Idd67c68f7cb43bc2117cc78336347db7e2f21991
73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package blueprint
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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)
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// Based on Andrew Gerrand's "10 things you (probably) dont' know about Go"
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var fs fileSystem = osFS{}
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type fileSystem interface {
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Open(name string) (io.ReadCloser, error)
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Exists(name string) (bool, bool, error)
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}
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// osFS implements fileSystem using the local disk.
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type osFS struct{}
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func (osFS) Open(name string) (io.ReadCloser, error) { return os.Open(name) }
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func (osFS) Exists(name string) (bool, bool, error) {
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stat, err := os.Stat(name)
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if err == nil {
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return true, stat.IsDir(), nil
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} else if os.IsNotExist(err) {
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return false, false, nil
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} else {
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return false, false, err
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}
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}
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type mockFS struct {
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files map[string][]byte
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}
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func (m mockFS) Open(name string) (io.ReadCloser, error) {
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if f, ok := m.files[name]; ok {
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return struct {
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io.Closer
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*bytes.Reader
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}{
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ioutil.NopCloser(nil),
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bytes.NewReader(f),
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}, nil
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}
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return nil, &os.PathError{
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Op: "open",
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Path: name,
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Err: os.ErrNotExist,
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}
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}
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func (m mockFS) Exists(name string) (bool, bool, error) {
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_, ok := m.files[name]
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return ok, false, nil
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}
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