github.com/uber/kraken@v0.1.4/lib/store/testing.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package store
    15  
    16  import (
    17  	"bytes"
    18  	"io"
    19  	"io/ioutil"
    20  	"os"
    21  
    22  	"github.com/uber/kraken/core"
    23  	"github.com/uber/kraken/utils/testutil"
    24  )
    25  
    26  // MockFileReadWriter is a mock FileReadWriter that is backed by a
    27  // physical file. This is preferred to a gomock struct because read/write
    28  // operations are greatly simplified.
    29  type MockFileReadWriter struct {
    30  	*os.File
    31  	Committed bool
    32  }
    33  
    34  // Commit implements FileReadWriter.Commit
    35  func (f *MockFileReadWriter) Commit() error { panic("commit not implemented") }
    36  
    37  // Cancel implements FileReadWriter.Cancel
    38  func (f *MockFileReadWriter) Cancel() error { panic("cancel not implemented") }
    39  
    40  // Size implements FileReadWriter.Size
    41  func (f *MockFileReadWriter) Size() int64 { panic("size not implemented") }
    42  
    43  var _ FileReadWriter = (*MockFileReadWriter)(nil)
    44  
    45  // NewMockFileReadWriter returns a new MockFileReadWriter and a cleanup function.
    46  func NewMockFileReadWriter(content []byte) (*MockFileReadWriter, func()) {
    47  	cleanup := new(testutil.Cleanup)
    48  	defer cleanup.Recover()
    49  
    50  	tmp, err := ioutil.TempFile("", "")
    51  	if err != nil {
    52  		panic(err)
    53  	}
    54  	name := tmp.Name()
    55  	cleanup.Add(func() { os.Remove(name) })
    56  
    57  	if _, err := tmp.Write(content); err != nil {
    58  		panic(err)
    59  	}
    60  	if err := tmp.Close(); err != nil {
    61  		panic(err)
    62  	}
    63  
    64  	// Open fresh file.
    65  	f, err := os.OpenFile(name, os.O_RDWR, 0775)
    66  	if err != nil {
    67  		panic(err)
    68  	}
    69  
    70  	return &MockFileReadWriter{File: f}, cleanup.Run
    71  }
    72  
    73  // RunDownload downloads content to cads.
    74  func RunDownload(cads *CADownloadStore, d core.Digest, content []byte) error {
    75  	if err := cads.CreateDownloadFile(d.Hex(), int64(len(content))); err != nil {
    76  		return err
    77  	}
    78  	w, err := cads.GetDownloadFileReadWriter(d.Hex())
    79  	if err != nil {
    80  		return err
    81  	}
    82  	if _, err := io.Copy(w, bytes.NewReader(content)); err != nil {
    83  		return err
    84  	}
    85  	return cads.MoveDownloadFileToCache(d.Hex())
    86  }