| 1 | package logger |
| 2 | |
| 3 | import ( |
| 4 | "log/slog" |
| 5 | "sync/atomic" |
| 6 | "testing" |
| 7 | |
| 8 | "github.com/stretchr/testify/assert" |
| 9 | ) |
| 10 | |
| 11 | type formatProbe struct { |
| 12 | hits *atomic.Int32 |
| 13 | } |
| 14 | |
| 15 | func (p formatProbe) String() string { |
| 16 | p.hits.Add(1) |
| 17 | return "probe" |
| 18 | } |
| 19 | |
| 20 | func TestWhenElseLogsOnlyChosenBranch(t *testing.T) { |
| 21 | setTestLevel(t, slog.LevelDebug) |
| 22 | |
| 23 | l, h := newTestLogger(slog.LevelDebug) |
| 24 | |
| 25 | l.When(true).Warning("warn1").Else().Info("info1") |
| 26 | assert.Equal(t, 1, h.count()) |
| 27 | assert.Equal(t, slog.LevelWarn, h.last().level) |
| 28 | assert.Equal(t, "warn1", h.last().msg) |
| 29 | |
| 30 | l.When(false).Warning("warn2").Else().Info("info2") |
| 31 | assert.Equal(t, 2, h.count()) |
| 32 | assert.Equal(t, slog.LevelInfo, h.last().level) |
| 33 | assert.Equal(t, "info2", h.last().msg) |
| 34 | } |
| 35 | |
| 36 | func TestWhenElseSkipsFormattingOnSuppressedBranch(t *testing.T) { |
| 37 | setTestLevel(t, slog.LevelDebug) |
| 38 | |
| 39 | l, h := newTestLogger(slog.LevelDebug) |
| 40 | var firstHits atomic.Int32 |
| 41 | var secondHits atomic.Int32 |
| 42 | |
| 43 | l.When(true).Warningf("warn %s", formatProbe{hits: &firstHits}).Else().Infof("info %s", formatProbe{hits: &secondHits}) |
| 44 | |
| 45 | assert.Equal(t, int32(1), firstHits.Load()) |
| 46 | assert.Equal(t, int32(0), secondHits.Load()) |
| 47 | assert.Equal(t, 1, h.count()) |
| 48 | assert.Equal(t, slog.LevelWarn, h.last().level) |
| 49 | } |
| 50 | |
| 51 | func TestWhenWithoutElseDoesNotLogWhenConditionFalse(t *testing.T) { |
| 52 | setTestLevel(t, slog.LevelDebug) |
| 53 | |
| 54 | l, h := newTestLogger(slog.LevelDebug) |
| 55 | l.When(false).Infof("suppressed %d", 1) |
| 56 | |
| 57 | assert.Equal(t, 0, h.count()) |
| 58 | } |
| 59 | |
| 60 | func TestWhenNilLoggerDoesNotPanic(t *testing.T) { |
| 61 | setTestLevel(t, slog.LevelDebug) |
| 62 | |
| 63 | var l *Logger |
| 64 | assert.NotPanics(t, func() { |
| 65 | l.When(true).Noticef("hello %s", "world").Else().Info("ignored") |
| 66 | }) |
| 67 | } |