cloudflare/cloudflared
Publicmirrored from https://github.com/cloudflare/cloudflaredAvailable
logger/create_test.go
132lines · modecode
| 1 | package logger |
| 2 | |
| 3 | import ( |
| 4 | "io" |
| 5 | "testing" |
| 6 | |
| 7 | "github.com/pkg/errors" |
| 8 | "github.com/rs/zerolog" |
| 9 | "github.com/stretchr/testify/assert" |
| 10 | ) |
| 11 | |
| 12 | type mockedWriter struct { |
| 13 | wantErr bool |
| 14 | writeCalls int |
| 15 | } |
| 16 | |
| 17 | func (c *mockedWriter) Write(p []byte) (int, error) { |
| 18 | c.writeCalls++ |
| 19 | |
| 20 | if c.wantErr { |
| 21 | return -1, errors.New("Expected error") |
| 22 | } |
| 23 | |
| 24 | return len(p), nil |
| 25 | } |
| 26 | |
| 27 | // Tests that a new writer is only used if it actually works. |
| 28 | func TestResilientMultiWriter_Errors(t *testing.T) { |
| 29 | tests := []struct { |
| 30 | name string |
| 31 | writers []*mockedWriter |
| 32 | }{ |
| 33 | { |
| 34 | name: "All valid writers", |
| 35 | writers: []*mockedWriter{ |
| 36 | { |
| 37 | wantErr: false, |
| 38 | }, |
| 39 | { |
| 40 | wantErr: false, |
| 41 | }, |
| 42 | }, |
| 43 | }, |
| 44 | { |
| 45 | name: "All invalid writers", |
| 46 | writers: []*mockedWriter{ |
| 47 | { |
| 48 | wantErr: true, |
| 49 | }, |
| 50 | { |
| 51 | wantErr: true, |
| 52 | }, |
| 53 | }, |
| 54 | }, |
| 55 | { |
| 56 | name: "First invalid writer", |
| 57 | writers: []*mockedWriter{ |
| 58 | { |
| 59 | wantErr: true, |
| 60 | }, |
| 61 | { |
| 62 | wantErr: false, |
| 63 | }, |
| 64 | }, |
| 65 | }, |
| 66 | { |
| 67 | name: "First valid writer", |
| 68 | writers: []*mockedWriter{ |
| 69 | { |
| 70 | wantErr: false, |
| 71 | }, |
| 72 | { |
| 73 | wantErr: true, |
| 74 | }, |
| 75 | }, |
| 76 | }, |
| 77 | } |
| 78 | |
| 79 | for _, test := range tests { |
| 80 | t.Run(test.name, func(t *testing.T) { |
| 81 | writers := []io.Writer{} |
| 82 | for _, w := range test.writers { |
| 83 | writers = append(writers, w) |
| 84 | } |
| 85 | multiWriter := resilientMultiWriter{zerolog.InfoLevel, writers, nil} |
| 86 | |
| 87 | logger := zerolog.New(multiWriter).With().Timestamp().Logger() |
| 88 | logger.Info().Msg("Test msg") |
| 89 | |
| 90 | for _, w := range test.writers { |
| 91 | // Expect each writer to be written to regardless of the previous writers returning an error |
| 92 | assert.Equal(t, 1, w.writeCalls) |
| 93 | } |
| 94 | }) |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | type mockedManagementWriter struct { |
| 99 | WriteCalls int |
| 100 | } |
| 101 | |
| 102 | func (c *mockedManagementWriter) Write(p []byte) (int, error) { |
| 103 | return len(p), nil |
| 104 | } |
| 105 | |
| 106 | func (c *mockedManagementWriter) WriteLevel(level zerolog.Level, p []byte) (int, error) { |
| 107 | c.WriteCalls++ |
| 108 | return len(p), nil |
| 109 | } |
| 110 | |
| 111 | // Tests that management writer receives write calls of all levels except Disabled |
| 112 | func TestResilientMultiWriter_Management(t *testing.T) { |
| 113 | for _, level := range []zerolog.Level{ |
| 114 | zerolog.DebugLevel, |
| 115 | zerolog.InfoLevel, |
| 116 | zerolog.WarnLevel, |
| 117 | zerolog.ErrorLevel, |
| 118 | zerolog.FatalLevel, |
| 119 | zerolog.PanicLevel, |
| 120 | } { |
| 121 | t.Run(level.String(), func(t *testing.T) { |
| 122 | managementWriter := mockedManagementWriter{} |
| 123 | multiWriter := resilientMultiWriter{level, []io.Writer{&mockedWriter{}}, &managementWriter} |
| 124 | |
| 125 | logger := zerolog.New(multiWriter).With().Timestamp().Logger() |
| 126 | logger.Info().Msg("Test msg") |
| 127 | |
| 128 | // Always write to management |
| 129 | assert.Equal(t, 1, managementWriter.WriteCalls) |
| 130 | }) |
| 131 | } |
| 132 | } |