// Copyright 2017 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package time_test import ( "strings" "testing" . "time" ) func TestHasMonotonicClock(t *testing.T) { yes := func(expr string, tt Time) { if GetMono(&tt) == 0 { t.Errorf("%s: missing monotonic clock reading", expr) } } no := func(expr string, tt Time) { if GetMono(&tt) != 0 { t.Errorf("%s: unexpected monotonic clock reading", expr) } } yes("<-After(1)", <-After(1)) ticker := NewTicker(1) yes("<-Tick(1)", <-ticker.C) ticker.Stop() no("Date(2009, 11, 23, 0, 0, 0, 0, UTC)", Date(2009, 11, 23, 0, 0, 0, 0, UTC)) tp, _ := Parse(UnixDate, "Sat Mar 7 11:06:39 PST 2015") no(`Parse(UnixDate, "Sat Mar 7 11:06:39 PST 2015")`, tp) no("Unix(1486057371, 0)", Unix(1486057371, 0)) yes("Now()", Now()) tu := Unix(1486057371, 0) tm := tu SetMono(&tm, 123456) no("tu", tu) yes("tm", tm) no("tu.Add(1)", tu.Add(1)) no("tu.In(UTC)", tu.In(UTC)) no("tu.AddDate(1, 1, 1)", tu.AddDate(1, 1, 1)) no("tu.AddDate(0, 0, 0)", tu.AddDate(0, 0, 0)) no("tu.Local()", tu.Local()) no("tu.UTC()", tu.UTC()) no("tu.Round(2)", tu.Round(2)) no("tu.Truncate(2)", tu.Truncate(2)) yes("tm.Add(1)", tm.Add(1)) no("tm.AddDate(1, 1, 1)", tm.AddDate(1, 1, 1)) no("tm.AddDate(0, 0, 0)", tm.AddDate(0, 0, 0)) no("tm.In(UTC)", tm.In(UTC)) no("tm.Local()", tm.Local()) no("tm.UTC()", tm.UTC()) no("tm.Round(2)", tm.Round(2)) no("tm.Truncate(2)", tm.Truncate(2)) } func TestMonotonicAdd(t *testing.T) { tm := Unix(1486057371, 123456) SetMono(&tm, 123456789012345) t2 := tm.Add(1e8) if t2.Nanosecond() != 100123456 { t.Errorf("t2.Nanosecond() = %d, want 100123456", t2.Nanosecond()) } if GetMono(&t2) != 123456889012345 { t.Errorf("t2.mono = %d, want 123456889012345", GetMono(&t2)) } t3 := tm.Add(-9e18) // wall now out of range if t3.Nanosecond() != 123456 { t.Errorf("t3.Nanosecond() = %d, want 123456", t3.Nanosecond()) } if GetMono(&t3) != 0 { t.Errorf("t3.mono = %d, want 0 (wall time out of range for monotonic reading)", GetMono(&t3)) } t4 := tm.Add(+9e18) // wall now out of range if t4.Nanosecond() != 123456 { t.Errorf("t4.Nanosecond() = %d, want 123456", t4.Nanosecond()) } if GetMono(&t4) != 0 { t.Errorf("t4.mono = %d, want 0 (wall time out of range for monotonic reading)", GetMono(&t4)) } tn := Now() tn1 := tn.Add(1 * Hour) Sleep(100 * Millisecond) d := Until(tn1) if d < 59*Minute { t.Errorf("Until(Now().Add(1*Hour)) = %v, wanted at least 59m", d) } now := Now() if now.After(tn1) { t.Errorf("Now().After(Now().Add(1*Hour)) = true, want false") } if !tn1.After(now) { t.Errorf("Now().Add(1*Hour).After(now) = false, want true") } if tn1.Before(now) { t.Errorf("Now().Add(1*Hour).Before(Now()) = true, want false") } if !now.Before(tn1) { t.Errorf("Now().Before(Now().Add(1*Hour)) = false, want true") } if got, want := now.Compare(tn1), -1; got != want { t.Errorf("Now().Compare(Now().Add(1*Hour)) = %d, want %d", got, want) } if got, want := tn1.Compare(now), 1; got != want { t.Errorf("Now().Add(1*Hour).Compare(Now()) = %d, want %d", got, want) } } func TestMonotonicSub(t *testing.T) { t1 := Unix(1483228799, 995e6) SetMono(&t1, 123456789012345) t2 := Unix(1483228799, 5e6) SetMono(&t2, 123456789012345+10e6) t3 := Unix(1483228799, 995e6) SetMono(&t3, 123456789012345+1e9) t1w := t1.AddDate(0, 0, 0) if GetMono(&t1w) != 0 { t.Fatalf("AddDate didn't strip monotonic clock reading") } t2w := t2.AddDate(0, 0, 0) if GetMono(&t2w) != 0 { t.Fatalf("AddDate didn't strip monotonic clock reading") } t3w := t3.AddDate(0, 0, 0) if GetMono(&t3w) != 0 { t.Fatalf("AddDate didn't strip monotonic clock reading") } sub := func(txs, tys string, tx, txw, ty, tyw Time, d, dw Duration) { check := func(expr string, d, want Duration) { if d != want { t.Errorf("%s = %v, want %v", expr, d, want) } } check(txs+".Sub("+tys+")", tx.Sub(ty), d) check(txs+"w.Sub("+tys+")", txw.Sub(ty), dw) check(txs+".Sub("+tys+"w)", tx.Sub(tyw), dw) check(txs+"w.Sub("+tys+"w)", txw.Sub(tyw), dw) } sub("t1", "t1", t1, t1w, t1, t1w, 0, 0) sub("t1", "t2", t1, t1w, t2, t2w, -10*Millisecond, 990*Millisecond) sub("t1", "t3", t1, t1w, t3, t3w, -1000*Millisecond, 0) sub("t2", "t1", t2, t2w, t1, t1w, 10*Millisecond, -990*Millisecond) sub("t2", "t2", t2, t2w, t2, t2w, 0, 0) sub("t2", "t3", t2, t2w, t3, t3w, -990*Millisecond, -990*Millisecond) sub("t3", "t1", t3, t3w, t1, t1w, 1000*Millisecond, 0) sub("t3", "t2", t3, t3w, t2, t2w, 990*Millisecond, 990*Millisecond) sub("t3", "t3", t3, t3w, t3, t3w, 0, 0) cmp := func(txs, tys string, tx, txw, ty, tyw Time, c, cw int) { check := func(expr string, b, want any) { if b != want { t.Errorf("%s = %v, want %v", expr, b, want) } } check(txs+".After("+tys+")", tx.After(ty), c > 0) check(txs+"w.After("+tys+")", txw.After(ty), cw > 0) check(txs+".After("+tys+"w)", tx.After(tyw), cw > 0) check(txs+"w.After("+tys+"w)", txw.After(tyw), cw > 0) check(txs+".Before("+tys+")", tx.Before(ty), c < 0) check(txs+"w.Before("+tys+")", txw.Before(ty), cw < 0) check(txs+".Before("+tys+"w)", tx.Before(tyw), cw < 0) check(txs+"w.Before("+tys+"w)", txw.Before(tyw), cw < 0) check(txs+".Equal("+tys+")", tx.Equal(ty), c == 0) check(txs+"w.Equal("+tys+")", txw.Equal(ty), cw == 0) check(txs+".Equal("+tys+"w)", tx.Equal(tyw), cw == 0) check(txs+"w.Equal("+tys+"w)", txw.Equal(tyw), cw == 0) check(txs+".Compare("+tys+")", tx.Compare(ty), c) check(txs+"w.Compare("+tys+")", txw.Compare(ty), cw) check(txs+".Compare("+tys+"w)", tx.Compare(tyw), cw) check(txs+"w.Compare("+tys+"w)", txw.Compare(tyw), cw) } cmp("t1", "t1", t1, t1w, t1, t1w, 0, 0) cmp("t1", "t2", t1, t1w, t2, t2w, -1, +1) cmp("t1", "t3", t1, t1w, t3, t3w, -1, 0) cmp("t2", "t1", t2, t2w, t1, t1w, +1, -1) cmp("t2", "t2", t2, t2w, t2, t2w, 0, 0) cmp("t2", "t3", t2, t2w, t3, t3w, -1, -1) cmp("t3", "t1", t3, t3w, t1, t1w, +1, 0) cmp("t3", "t2", t3, t3w, t2, t2w, +1, +1) cmp("t3", "t3", t3, t3w, t3, t3w, 0, 0) } func TestMonotonicOverflow(t *testing.T) { t1 := Now().Add(-30 * Second) d := Until(t1) if d < -35*Second || -30*Second < d { t.Errorf("Until(Now().Add(-30s)) = %v, want roughly -30s (-35s to -30s)", d) } t1 = Now().Add(30 * Second) d = Until(t1) if d < 25*Second || 30*Second < d { t.Errorf("Until(Now().Add(-30s)) = %v, want roughly 30s (25s to 30s)", d) } t0 := Now() t1 = t0.Add(Duration(1<<63 - 1)) if GetMono(&t1) != 0 { t.Errorf("Now().Add(maxDuration) has monotonic clock reading (%v => %v %d %d)", t0.String(), t1.String(), t0.Unix(), t1.Unix()) } t2 := t1.Add(-Duration(1<<63 - 1)) d = Since(t2) if d < -10*Second || 10*Second < d { t.Errorf("Since(Now().Add(max).Add(-max)) = %v, want [-10s, 10s]", d) } t0 = Now() t1 = t0.Add(1 * Hour) Sleep(100 * Millisecond) t2 = Now().Add(-5 * Second) if !t1.After(t2) { t.Errorf("Now().Add(1*Hour).After(Now().Add(-5*Second)) = false, want true\nt1=%v\nt2=%v", t1, t2) } if t2.After(t1) { t.Errorf("Now().Add(-5*Second).After(Now().Add(1*Hour)) = true, want false\nt1=%v\nt2=%v", t1, t2) } if t1.Before(t2) { t.Errorf("Now().Add(1*Hour).Before(Now().Add(-5*Second)) = true, want false\nt1=%v\nt2=%v", t1, t2) } if !t2.Before(t1) { t.Errorf("Now().Add(-5*Second).Before(Now().Add(1*Hour)) = false, want true\nt1=%v\nt2=%v", t1, t2) } if got, want := t1.Compare(t2), 1; got != want { t.Errorf("Now().Add(1*Hour).Compare(Now().Add(-5*Second)) = %d, want %d\nt1=%v\nt2=%v", got, want, t1, t2) } if got, want := t2.Compare(t1), -1; got != want { t.Errorf("Now().Add(-5*Second).Before(Now().Add(1*Hour)) = %d, want %d\nt1=%v\nt2=%v", got, want, t1, t2) } } var monotonicStringTests = []struct { mono int64 want string }{ {0, "m=+0.000000000"}, {123456789, "m=+0.123456789"}, {-123456789, "m=-0.123456789"}, {123456789000, "m=+123.456789000"}, {-123456789000, "m=-123.456789000"}, {9e18, "m=+9000000000.000000000"}, {-9e18, "m=-9000000000.000000000"}, {-1 << 63, "m=-9223372036.854775808"}, } func TestMonotonicString(t *testing.T) { t1 := Now() t.Logf("Now() = %v", t1) for _, tt := range monotonicStringTests { t1 := Now() SetMono(&t1, tt.mono) s := t1.String() got := s[strings.LastIndex(s, " ")+1:] if got != tt.want { t.Errorf("with mono=%d: got %q; want %q", tt.mono, got, tt.want) } } }