Source file
src/time/mono_test.go
Documentation: time
1
2
3
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)
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)
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 }
262
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