| 26 | } |
| 27 | |
| 28 | func TestNewTimer(t *testing.T) { |
| 29 | // Set a small MaxSleepTime for testing |
| 30 | setMaxSleepTimeForTest(t, testMaxSleepTime) |
| 31 | |
| 32 | tests := []struct { |
| 33 | name string |
| 34 | duration time.Duration |
| 35 | expected time.Duration |
| 36 | }{ |
| 37 | { |
| 38 | name: "short duration", |
| 39 | duration: 20 * time.Millisecond, |
| 40 | expected: 20 * time.Millisecond, |
| 41 | }, |
| 42 | { |
| 43 | name: "long duration should wait full duration", |
| 44 | duration: 1 * time.Second, |
| 45 | expected: 1 * time.Second, |
| 46 | }, |
| 47 | { |
| 48 | name: "exactly maxSleepTime", |
| 49 | duration: testMaxSleepTime, |
| 50 | expected: testMaxSleepTime, |
| 51 | }, |
| 52 | { |
| 53 | name: "zero duration", |
| 54 | duration: 0, |
| 55 | expected: 0, |
| 56 | }, |
| 57 | } |
| 58 | |
| 59 | for _, tt := range tests { |
| 60 | t.Run(tt.name, func(t *testing.T) { |
| 61 | start := clock.Now() |
| 62 | target := start.Add(tt.duration) |
| 63 | |
| 64 | timer := NewTimer(clock.Now, target) |
| 65 | |
| 66 | // Wait for timer to trigger |
| 67 | <-timer.C |
| 68 | |
| 69 | elapsed := clock.Now().Sub(start) |
| 70 | |
| 71 | if tt.duration == 0 { |
| 72 | if elapsed > 10*time.Millisecond { |
| 73 | t.Errorf("zero duration timer took too long: %v", elapsed) |
| 74 | } |
| 75 | |
| 76 | return |
| 77 | } |
| 78 | |
| 79 | // Allow some tolerance for timing variations |
| 80 | tolerance := 50 * time.Millisecond |
| 81 | if tt.duration < 100*time.Millisecond { |
| 82 | tolerance = 20 * time.Millisecond |
| 83 | } |
| 84 | |
| 85 | if elapsed < tt.duration-tolerance || elapsed > tt.duration+tolerance { |