github.com/m3db/m3@v1.5.0/src/dbnode/storage/limits/permits/lookback_limit_permit_test.go (about)

     1  // Copyright (c) 2021  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
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     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,
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    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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    19  // THE SOFTWARE.
    20  
    21  package permits
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/stretchr/testify/require"
    27  
    28  	"github.com/m3db/m3/src/dbnode/storage/limits"
    29  	"github.com/m3db/m3/src/x/context"
    30  	"github.com/m3db/m3/src/x/instrument"
    31  )
    32  
    33  func TestLookbackLimitPermit(t *testing.T) {
    34  	lookbackLimit := newTestLookbackLimit()
    35  	manager := newManager(t, lookbackLimit)
    36  
    37  	ctx := context.NewBackground()
    38  	permits, err := manager.NewPermits(ctx)
    39  	require.NoError(t, err)
    40  
    41  	require.Equal(t, 0, lookbackLimit.count)
    42  
    43  	_, err = permits.Acquire(ctx)
    44  	require.NoError(t, err)
    45  	require.Equal(t, 1, lookbackLimit.count)
    46  
    47  	_, err = permits.TryAcquire(ctx)
    48  	require.NoError(t, err)
    49  	require.Equal(t, 2, lookbackLimit.count)
    50  }
    51  
    52  func newManager(t *testing.T, limit limits.LookbackLimit) *LookbackLimitPermitManager {
    53  	t.Helper()
    54  	mgr := NewLookbackLimitPermitsManager(
    55  		"test-limit",
    56  		limits.DefaultLookbackLimitOptions(),
    57  		instrument.NewTestOptions(t),
    58  		limits.NewOptions().SourceLoggerBuilder(),
    59  	)
    60  	mgr.Limit = limit
    61  
    62  	return mgr
    63  }
    64  
    65  func newTestLookbackLimit() *testLookbackLimit {
    66  	return &testLookbackLimit{}
    67  }
    68  
    69  type testLookbackLimit struct {
    70  	count int
    71  }
    72  
    73  func (t *testLookbackLimit) Options() limits.LookbackLimitOptions {
    74  	return limits.LookbackLimitOptions{}
    75  }
    76  
    77  func (t *testLookbackLimit) Inc(inc int, _ []byte) error {
    78  	t.count += inc
    79  	return nil
    80  }
    81  
    82  func (t *testLookbackLimit) Update(limits.LookbackLimitOptions) error {
    83  	panic("implement me")
    84  }
    85  
    86  func (t *testLookbackLimit) Start() {
    87  	panic("implement me")
    88  }
    89  
    90  func (t *testLookbackLimit) Stop() {
    91  	panic("implement me")
    92  }