github.com/m3db/m3@v1.5.0/src/dbnode/digest/test_util.go (about)

     1  // Copyright (c) 2016 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package digest
    22  
    23  import (
    24  	"io/ioutil"
    25  	"os"
    26  	"testing"
    27  
    28  	"github.com/stretchr/testify/require"
    29  )
    30  
    31  type mockDigest struct {
    32  	b      []byte
    33  	digest uint32
    34  	err    error
    35  }
    36  
    37  func (md *mockDigest) Write(p []byte) (n int, err error) {
    38  	if md.err != nil {
    39  		return 0, md.err
    40  	}
    41  	md.b = append(md.b, p...)
    42  	return len(p), nil
    43  }
    44  
    45  func (md *mockDigest) Sum(b []byte) []byte { return nil }
    46  func (md *mockDigest) Reset()              {}
    47  func (md *mockDigest) ResetTo(v uint32)    {}
    48  func (md *mockDigest) Size() int           { return 0 }
    49  func (md *mockDigest) BlockSize() int      { return 0 }
    50  func (md *mockDigest) Sum32() uint32       { return md.digest }
    51  
    52  func createTestFdWithDigest(t *testing.T) (*os.File, *mockDigest) {
    53  	fd := createTempFile(t)
    54  	md := &mockDigest{}
    55  	return fd, md
    56  }
    57  
    58  func createTempFile(t *testing.T) *os.File {
    59  	fd, err := ioutil.TempFile("", "testfile")
    60  	require.NoError(t, err)
    61  	return fd
    62  }