github.com/m3db/m3@v1.5.0/src/x/test/hash/hash.go (about)

     1  // Copyright (c) 2020 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 hash
    22  
    23  import (
    24  	"regexp"
    25  	"strconv"
    26  	"testing"
    27  
    28  	"github.com/m3db/m3/src/dbnode/persist/schema"
    29  	"github.com/m3db/m3/src/dbnode/ts"
    30  	"github.com/m3db/m3/src/x/ident"
    31  
    32  	"github.com/stretchr/testify/require"
    33  )
    34  
    35  type parsedIndexHasher struct {
    36  	t  *testing.T
    37  	re *regexp.Regexp
    38  }
    39  
    40  // NewParsedIndexHasher builds a new test IndexEntryHasher, hashing IndexEntries
    41  // to the parsed value of their IDs.
    42  func NewParsedIndexHasher(t *testing.T) schema.IndexEntryHasher {
    43  	re, err := regexp.Compile(`\d[\d,]*[\.]?[\d{2}]*`)
    44  	require.NoError(t, err)
    45  
    46  	return &parsedIndexHasher{t: t, re: re}
    47  }
    48  
    49  func (h *parsedIndexHasher) HashIndexEntry(
    50  	id ident.BytesID,
    51  	encodedTags ts.EncodedTags,
    52  	dataChecksum int64,
    53  ) int64 {
    54  	matched := h.re.FindAllString(string(id), -1)
    55  	if len(matched) == 0 {
    56  		return 0
    57  	}
    58  
    59  	i, err := strconv.Atoi(matched[0])
    60  	require.NoError(h.t, err)
    61  	return int64(i)
    62  }