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// Copyright 2017 The LUCI 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 testutil
import (
"bytes"
"context"
"io"
"go.chromium.org/luci/cipd/appengine/impl/gs"
)
// NoopGoogleStorage implements gs.GoogleStorage interface by returning errors.
//
// Can be embedded into mock implementations that override some subset of
// methods.
type NoopGoogleStorage struct {
Err error // an error to return or nil to panic
}
var _ gs.GoogleStorage = NoopGoogleStorage{}
// Exists is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) Exists(c context.Context, path string) (exists bool, err error) {
if n.Err == nil {
panic("must not be called")
}
return false, n.Err
}
// Copy is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) Copy(c context.Context, dst string, dstGen int64, src string, srcGen int64) error {
if n.Err == nil {
panic("must not be called")
}
return n.Err
}
// Delete is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) Delete(c context.Context, path string) error {
if n.Err == nil {
panic("must not be called")
}
return n.Err
}
// Publish is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) Publish(c context.Context, dst, src string, srcGen int64) error {
if n.Err == nil {
panic("must not be called")
}
return n.Err
}
// StartUpload is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) StartUpload(c context.Context, path string) (uploadURL string, err error) {
if n.Err == nil {
panic("must not be called")
}
return "", n.Err
}
// CancelUpload is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) CancelUpload(c context.Context, uploadURL string) error {
if n.Err == nil {
panic("must not be called")
}
return n.Err
}
// Reader is part of gs.GoogleStorage interface.
func (n NoopGoogleStorage) Reader(c context.Context, path string, gen int64) (gs.Reader, error) {
if n.Err == nil {
panic("must not be called")
}
return nil, n.Err
}
// MockGSReader implements gs.Reader on top of a regular io.ReaderAt.
type MockGSReader struct {
io.ReaderAt
Len int64
Gen int64
}
// Size is part of gs.Reader interface.
func (m *MockGSReader) Size() int64 { return m.Len }
// Generation is part of gs.Reader interface.
func (m *MockGSReader) Generation() int64 { return m.Gen }
// NewMockGSReader constructs MockGSReader from a byte slice.
func NewMockGSReader(data []byte) *MockGSReader {
return &MockGSReader{
ReaderAt: bytes.NewReader(data),
Len: int64(len(data)),
Gen: 1,
}
}