github.com/m3db/m3@v1.5.0/src/x/clock/options_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
     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 clock
    22  
    23  import (
    24  	"os"
    25  	"testing"
    26  
    27  	"github.com/stretchr/testify/assert"
    28  	"github.com/stretchr/testify/require"
    29  )
    30  
    31  func TestPanicOnDefaultClock(t *testing.T) {
    32  	tests := []struct {
    33  		value       string
    34  		shouldPanic bool
    35  	}{
    36  		{
    37  			value:       "<unset>", // environment variable not set
    38  			shouldPanic: false,
    39  		},
    40  		{
    41  			value:       "",
    42  			shouldPanic: false,
    43  		},
    44  		{
    45  			value:       "false",
    46  			shouldPanic: false,
    47  		},
    48  		{
    49  			value:       "0",
    50  			shouldPanic: false,
    51  		},
    52  		{
    53  			value:       "true",
    54  			shouldPanic: true,
    55  		},
    56  		{
    57  			value:       "1",
    58  			shouldPanic: true,
    59  		},
    60  	}
    61  
    62  	for _, tt := range tests {
    63  		t.Run(tt.value, func(t *testing.T) {
    64  			if tt.value != "<unset>" {
    65  				require.NoError(t, os.Setenv(panicOnDefaultClockEnvVar, tt.value))
    66  			}
    67  			nowFn := NewOptions().NowFn()
    68  			require.NoError(t, os.Unsetenv(panicOnDefaultClockEnvVar))
    69  			if tt.shouldPanic {
    70  				assert.Panics(t, func() {
    71  					nowFn()
    72  				})
    73  			} else {
    74  				assert.NotPanics(t, func() {
    75  					nowFn()
    76  				})
    77  			}
    78  		})
    79  	}
    80  }