github.com/m3db/m3@v1.5.0/src/dbnode/storage/limits/source_logger_test.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 limits
    22  
    23  import (
    24  	"math"
    25  	"testing"
    26  
    27  	"github.com/stretchr/testify/assert"
    28  	"github.com/stretchr/testify/require"
    29  	"go.uber.org/zap"
    30  	"go.uber.org/zap/zapcore"
    31  
    32  	"github.com/m3db/m3/src/x/instrument"
    33  )
    34  
    35  func newTestZapHookOptions(logs *[]string) zap.Option {
    36  	// NB: allows inspection of incoming logs by writing them to slice.
    37  	return zap.Hooks(func(entry zapcore.Entry) error {
    38  		*logs = append(*logs, entry.Message)
    39  		return nil
    40  	})
    41  }
    42  
    43  func TestNewSourceLoggerAboveDebugLevelDoesNotLog(t *testing.T) {
    44  	testSourceLoggerWithLevel(t, false)
    45  }
    46  
    47  func TestNewSourceLoggerAtDebugLevelLogsWhenExceeded(t *testing.T) {
    48  	testSourceLoggerWithLevel(t, true)
    49  }
    50  
    51  func testSourceLoggerWithLevel(t *testing.T, debugLog bool) {
    52  	var (
    53  		err    error
    54  		logger *zap.Logger
    55  
    56  		writtenLogs = []string{}
    57  		zapHookOpts = newTestZapHookOptions(&writtenLogs)
    58  	)
    59  
    60  	if debugLog {
    61  		logger, err = zap.NewDevelopment(zapHookOpts)
    62  	} else {
    63  		logger, err = zap.NewProduction(zapHookOpts)
    64  	}
    65  
    66  	require.NoError(t, err)
    67  	var (
    68  		iOpts        = instrument.NewOptions().SetLogger(logger)
    69  		builder      = &sourceLoggerBuilder{}
    70  		sourceLogger = builder.NewSourceLogger("name", iOpts)
    71  	)
    72  
    73  	sourceLogger.LogSourceValue(1, []byte("foo"))
    74  	assert.Equal(t, 0, len(writtenLogs))
    75  
    76  	sourceLogger.LogSourceValue(defaultLimit-1, []byte("defaultLimit-1"))
    77  	assert.Equal(t, 0, len(writtenLogs))
    78  
    79  	sourceLogger.LogSourceValue(defaultLimit, []byte("defaultLimit"))
    80  	if debugLog {
    81  		assert.Equal(t, 1, len(writtenLogs))
    82  	} else {
    83  		assert.Equal(t, 0, len(writtenLogs))
    84  	}
    85  
    86  	sourceLogger.LogSourceValue(math.MaxInt64, []byte("maxInt"))
    87  	if debugLog {
    88  		assert.Equal(t, 2, len(writtenLogs))
    89  	} else {
    90  		assert.Equal(t, 0, len(writtenLogs))
    91  	}
    92  }