libgo/go/time/mono_test.go

   1 // Copyright 2017 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package time_test
   6
   7 import (
   8         "strings"
   9         "testing"
  10         . "time"
  11 )
  12
  13 func TestHasMonotonicClock(t *testing.T) {
  14         yes := func(expr string, tt Time) {
  15                 if GetMono(&tt) == 0 {
  16                         t.Errorf("%s: missing monotonic clock reading", expr)
  17                 }
  18         }
  19         no := func(expr string, tt Time) {
  20                 if GetMono(&tt) != 0 {
  21                         t.Errorf("%s: unexpected monotonic clock reading", expr)
  22                 }
  23         }
  24
  25         yes("<-After(1)", <-After(1))
  26         ticker := NewTicker(1)
  27         yes("<-Tick(1)", <-ticker.C)
  28         ticker.Stop()
  29         no("Date(2009, 11, 23, 0, 0, 0, 0, UTC)", Date(2009, 11, 23, 0, 0, 0, 0, UTC))
  30         tp, _ := Parse(UnixDate, "Sat Mar  7 11:06:39 PST 2015")
  31         no(`Parse(UnixDate, "Sat Mar  7 11:06:39 PST 2015")`, tp)
  32         no("Unix(1486057371, 0)", Unix(1486057371, 0))
  33
  34         yes("Now()", Now())
  35
  36         tu := Unix(1486057371, 0)
  37         tm := tu
  38         SetMono(&tm, 123456)
  39         no("tu", tu)
  40         yes("tm", tm)
  41
  42         no("tu.Add(1)", tu.Add(1))
  43         no("tu.In(UTC)", tu.In(UTC))
  44         no("tu.AddDate(1, 1, 1)", tu.AddDate(1, 1, 1))
  45         no("tu.AddDate(0, 0, 0)", tu.AddDate(0, 0, 0))
  46         no("tu.Local()", tu.Local())
  47         no("tu.UTC()", tu.UTC())
  48         no("tu.Round(2)", tu.Round(2))
  49         no("tu.Truncate(2)", tu.Truncate(2))
  50
  51         yes("tm.Add(1)", tm.Add(1))
  52         no("tm.AddDate(1, 1, 1)", tm.AddDate(1, 1, 1))
  53         no("tm.AddDate(0, 0, 0)", tm.AddDate(0, 0, 0))
  54         no("tm.In(UTC)", tm.In(UTC))
  55         no("tm.Local()", tm.Local())
  56         no("tm.UTC()", tm.UTC())
  57         no("tm.Round(2)", tm.Round(2))
  58         no("tm.Truncate(2)", tm.Truncate(2))
  59 }
  60
  61 func TestMonotonicAdd(t *testing.T) {
  62         tm := Unix(1486057371, 123456)
  63         SetMono(&tm, 123456789012345)
  64
  65         t2 := tm.Add(1e8)
  66         if t2.Nanosecond() != 100123456 {
  67                 t.Errorf("t2.Nanosecond() = %d, want 100123456", t2.Nanosecond())
  68         }
  69         if GetMono(&t2) != 123456889012345 {
  70                 t.Errorf("t2.mono = %d, want 123456889012345", GetMono(&t2))
  71         }
  72
  73         t3 := tm.Add(-9e18) // wall now out of range
  74         if t3.Nanosecond() != 123456 {
  75                 t.Errorf("t3.Nanosecond() = %d, want 123456", t3.Nanosecond())
  76         }
  77         if GetMono(&t3) != 0 {
  78                 t.Errorf("t3.mono = %d, want 0 (wall time out of range for monotonic reading)", GetMono(&t3))
  79         }
  80
  81         t4 := tm.Add(+9e18) // wall now out of range
  82         if t4.Nanosecond() != 123456 {
  83                 t.Errorf("t4.Nanosecond() = %d, want 123456", t4.Nanosecond())
  84         }
  85         if GetMono(&t4) != 0 {
  86                 t.Errorf("t4.mono = %d, want 0 (wall time out of range for monotonic reading)", GetMono(&t4))
  87         }
  88
  89         tn := Now()
  90         tn1 := tn.Add(1 * Hour)
  91         Sleep(100 * Millisecond)
  92         d := Until(tn1)
  93         if d < 59*Minute {
  94                 t.Errorf("Until(Now().Add(1*Hour)) = %v, wanted at least 59m", d)
  95         }
  96         now := Now()
  97         if now.After(tn1) {
  98                 t.Errorf("Now().After(Now().Add(1*Hour)) = true, want false")
  99         }
 100         if !tn1.After(now) {
 101                 t.Errorf("Now().Add(1*Hour).After(now) = false, want true")
 102         }
 103         if tn1.Before(now) {
 104                 t.Errorf("Now().Add(1*Hour).Before(Now()) = true, want false")
 105         }
 106         if !now.Before(tn1) {
 107                 t.Errorf("Now().Before(Now().Add(1*Hour)) = false, want true")
 108         }
 109 }
 110
 111 func TestMonotonicSub(t *testing.T) {
 112         t1 := Unix(1483228799, 995e6)
 113         SetMono(&t1, 123456789012345)
 114
 115         t2 := Unix(1483228799, 5e6)
 116         SetMono(&t2, 123456789012345+10e6)
 117
 118         t3 := Unix(1483228799, 995e6)
 119         SetMono(&t3, 123456789012345+1e9)
 120
 121         t1w := t1.AddDate(0, 0, 0)
 122         if GetMono(&t1w) != 0 {
 123                 t.Fatalf("AddDate didn't strip monotonic clock reading")
 124         }
 125         t2w := t2.AddDate(0, 0, 0)
 126         if GetMono(&t2w) != 0 {
 127                 t.Fatalf("AddDate didn't strip monotonic clock reading")
 128         }
 129         t3w := t3.AddDate(0, 0, 0)
 130         if GetMono(&t3w) != 0 {
 131                 t.Fatalf("AddDate didn't strip monotonic clock reading")
 132         }
 133
 134         sub := func(txs, tys string, tx, txw, ty, tyw Time, d, dw Duration) {
 135                 check := func(expr string, d, want Duration) {
 136                         if d != want {
 137                                 t.Errorf("%s = %v, want %v", expr, d, want)
 138                         }
 139                 }
 140                 check(txs+".Sub("+tys+")", tx.Sub(ty), d)
 141                 check(txs+"w.Sub("+tys+")", txw.Sub(ty), dw)
 142                 check(txs+".Sub("+tys+"w)", tx.Sub(tyw), dw)
 143                 check(txs+"w.Sub("+tys+"w)", txw.Sub(tyw), dw)
 144         }
 145         sub("t1", "t1", t1, t1w, t1, t1w, 0, 0)
 146         sub("t1", "t2", t1, t1w, t2, t2w, -10*Millisecond, 990*Millisecond)
 147         sub("t1", "t3", t1, t1w, t3, t3w, -1000*Millisecond, 0)
 148
 149         sub("t2", "t1", t2, t2w, t1, t1w, 10*Millisecond, -990*Millisecond)
 150         sub("t2", "t2", t2, t2w, t2, t2w, 0, 0)
 151         sub("t2", "t3", t2, t2w, t3, t3w, -990*Millisecond, -990*Millisecond)
 152
 153         sub("t3", "t1", t3, t3w, t1, t1w, 1000*Millisecond, 0)
 154         sub("t3", "t2", t3, t3w, t2, t2w, 990*Millisecond, 990*Millisecond)
 155         sub("t3", "t3", t3, t3w, t3, t3w, 0, 0)
 156
 157         cmp := func(txs, tys string, tx, txw, ty, tyw Time, c, cw int) {
 158                 check := func(expr string, b, want bool) {
 159                         if b != want {
 160                                 t.Errorf("%s = %v, want %v", expr, b, want)
 161                         }
 162                 }
 163                 check(txs+".After("+tys+")", tx.After(ty), c > 0)
 164                 check(txs+"w.After("+tys+")", txw.After(ty), cw > 0)
 165                 check(txs+".After("+tys+"w)", tx.After(tyw), cw > 0)
 166                 check(txs+"w.After("+tys+"w)", txw.After(tyw), cw > 0)
 167
 168                 check(txs+".Before("+tys+")", tx.Before(ty), c < 0)
 169                 check(txs+"w.Before("+tys+")", txw.Before(ty), cw < 0)
 170                 check(txs+".Before("+tys+"w)", tx.Before(tyw), cw < 0)
 171                 check(txs+"w.Before("+tys+"w)", txw.Before(tyw), cw < 0)
 172
 173                 check(txs+".Equal("+tys+")", tx.Equal(ty), c == 0)
 174                 check(txs+"w.Equal("+tys+")", txw.Equal(ty), cw == 0)
 175                 check(txs+".Equal("+tys+"w)", tx.Equal(tyw), cw == 0)
 176                 check(txs+"w.Equal("+tys+"w)", txw.Equal(tyw), cw == 0)
 177         }
 178
 179         cmp("t1", "t1", t1, t1w, t1, t1w, 0, 0)
 180         cmp("t1", "t2", t1, t1w, t2, t2w, -1, +1)
 181         cmp("t1", "t3", t1, t1w, t3, t3w, -1, 0)
 182
 183         cmp("t2", "t1", t2, t2w, t1, t1w, +1, -1)
 184         cmp("t2", "t2", t2, t2w, t2, t2w, 0, 0)
 185         cmp("t2", "t3", t2, t2w, t3, t3w, -1, -1)
 186
 187         cmp("t3", "t1", t3, t3w, t1, t1w, +1, 0)
 188         cmp("t3", "t2", t3, t3w, t2, t2w, +1, +1)
 189         cmp("t3", "t3", t3, t3w, t3, t3w, 0, 0)
 190 }
 191
 192 func TestMonotonicOverflow(t *testing.T) {
 193         t1 := Now().Add(-30 * Second)
 194         d := Until(t1)
 195         if d < -35*Second || -30*Second < d {
 196                 t.Errorf("Until(Now().Add(-30s)) = %v, want roughly -30s (-35s to -30s)", d)
 197         }
 198
 199         t1 = Now().Add(30 * Second)
 200         d = Until(t1)
 201         if d < 25*Second || 30*Second < d {
 202                 t.Errorf("Until(Now().Add(-30s)) = %v, want roughly 30s (25s to 30s)", d)
 203         }
 204
 205         t0 := Now()
 206         t1 = t0.Add(Duration(1<<63 - 1))
 207         if GetMono(&t1) != 0 {
 208                 t.Errorf("Now().Add(maxDuration) has monotonic clock reading (%v => %v %d %d)", t0.String(), t1.String(), t0.Unix(), t1.Unix())
 209         }
 210         t2 := t1.Add(-Duration(1<<63 - 1))
 211         d = Since(t2)
 212         if d < -10*Second || 10*Second < d {
 213                 t.Errorf("Since(Now().Add(max).Add(-max)) = %v, want [-10s, 10s]", d)
 214         }
 215
 216         t0 = Now()
 217         t1 = t0.Add(1 * Hour)
 218         Sleep(100 * Millisecond)
 219         t2 = Now().Add(-5 * Second)
 220         if !t1.After(t2) {
 221                 t.Errorf("Now().Add(1*Hour).After(Now().Add(-5*Second)) = false, want true\nt1=%v\nt2=%v", t1, t2)
 222         }
 223         if t2.After(t1) {
 224                 t.Errorf("Now().Add(-5*Second).After(Now().Add(1*Hour)) = true, want false\nt1=%v\nt2=%v", t1, t2)
 225         }
 226         if t1.Before(t2) {
 227                 t.Errorf("Now().Add(1*Hour).Before(Now().Add(-5*Second)) = true, want false\nt1=%v\nt2=%v", t1, t2)
 228         }
 229         if !t2.Before(t1) {
 230                 t.Errorf("Now().Add(-5*Second).Before(Now().Add(1*Hour)) = false, want true\nt1=%v\nt2=%v", t1, t2)
 231         }
 232 }
 233
 234 var monotonicStringTests = []struct {
 235         mono int64
 236         want string
 237 }{
 238         {0, "m=+0.000000000"},
 239         {123456789, "m=+0.123456789"},
 240         {-123456789, "m=-0.123456789"},
 241         {123456789000, "m=+123.456789000"},
 242         {-123456789000, "m=-123.456789000"},
 243         {9e18, "m=+9000000000.000000000"},
 244         {-9e18, "m=-9000000000.000000000"},
 245         {-1 << 63, "m=-9223372036.854775808"},
 246 }
 247
 248 func TestMonotonicString(t *testing.T) {
 249         t1 := Now()
 250         t.Logf("Now() = %v", t1)
 251
 252         for _, tt := range monotonicStringTests {
 253                 t1 := Now()
 254                 SetMono(&t1, tt.mono)
 255                 s := t1.String()
 256                 got := s[strings.LastIndex(s, " ")+1:]
 257                 if got != tt.want {
 258                         t.Errorf("with mono=%d: got %q; want %q", tt.mono, got, tt.want)
 259                 }
 260         }
 261 }