1 // Copyright 2021 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/time/time_delta_from_string.h"
6
7 #include "base/time/time.h"
8 #include "testing/gtest/include/gtest/gtest.h"
9
10 namespace base {
11
12 namespace {
13
14 // Adapted from Abseil's TEST(Duration, ParseDuration):
15 // https://cs.chromium.org/chromium/src/third_party/abseil-cpp/absl/time/duration_test.cc?l=1660&rcl=93c58ec988d77f4277f9c9d237d3507991fbd719
TEST(TimeDeltaFromStringTest,ParseTimeDeltaTest)16 TEST(TimeDeltaFromStringTest, ParseTimeDeltaTest) {
17 // No specified unit. Should only work for zero and infinity.
18 EXPECT_EQ(TimeDeltaFromString("0"), TimeDelta());
19 EXPECT_EQ(TimeDeltaFromString("+0"), TimeDelta());
20 EXPECT_EQ(TimeDeltaFromString("-0"), TimeDelta());
21
22 EXPECT_EQ(TimeDeltaFromString("inf"), TimeDelta::Max());
23 EXPECT_EQ(TimeDeltaFromString("+inf"), TimeDelta::Max());
24 EXPECT_EQ(TimeDeltaFromString("-inf"), TimeDelta::Min());
25 EXPECT_EQ(TimeDeltaFromString("infBlah"), std::nullopt);
26
27 // Illegal input forms.
28 EXPECT_EQ(TimeDeltaFromString(""), std::nullopt);
29 EXPECT_EQ(TimeDeltaFromString("0.0"), std::nullopt);
30 EXPECT_EQ(TimeDeltaFromString(".0"), std::nullopt);
31 EXPECT_EQ(TimeDeltaFromString("."), std::nullopt);
32 EXPECT_EQ(TimeDeltaFromString("01"), std::nullopt);
33 EXPECT_EQ(TimeDeltaFromString("1"), std::nullopt);
34 EXPECT_EQ(TimeDeltaFromString("-1"), std::nullopt);
35 EXPECT_EQ(TimeDeltaFromString("2"), std::nullopt);
36 EXPECT_EQ(TimeDeltaFromString("2 s"), std::nullopt);
37 EXPECT_EQ(TimeDeltaFromString(".s"), std::nullopt);
38 EXPECT_EQ(TimeDeltaFromString("-.s"), std::nullopt);
39 EXPECT_EQ(TimeDeltaFromString("s"), std::nullopt);
40 EXPECT_EQ(TimeDeltaFromString(" 2s"), std::nullopt);
41 EXPECT_EQ(TimeDeltaFromString("2s "), std::nullopt);
42 EXPECT_EQ(TimeDeltaFromString(" 2s "), std::nullopt);
43 EXPECT_EQ(TimeDeltaFromString("2mt"), std::nullopt);
44 EXPECT_EQ(TimeDeltaFromString("1e3s"), std::nullopt);
45
46 // One unit type.
47 EXPECT_EQ(TimeDeltaFromString("1ns"), Nanoseconds(1));
48 EXPECT_EQ(TimeDeltaFromString("1us"), Microseconds(1));
49 EXPECT_EQ(TimeDeltaFromString("1ms"), Milliseconds(1));
50 EXPECT_EQ(TimeDeltaFromString("1s"), Seconds(1));
51 EXPECT_EQ(TimeDeltaFromString("2m"), Minutes(2));
52 EXPECT_EQ(TimeDeltaFromString("2h"), Hours(2));
53 EXPECT_EQ(TimeDeltaFromString("2d"), Days(2));
54
55 // Huge counts of a unit. 9223372036854775807 == 2^63 - 1.
56 EXPECT_EQ(TimeDeltaFromString("9223372036854775807us"),
57 Microseconds(9223372036854775807));
58 EXPECT_EQ(TimeDeltaFromString("-9223372036854775807us"),
59 Microseconds(-9223372036854775807));
60
61 // Overflow count. Note the "93" at the beginning (instead of "92").
62 EXPECT_EQ(TimeDeltaFromString("9323372036854775807us"), std::nullopt);
63 // Overflow overall duration.
64 EXPECT_EQ(TimeDeltaFromString("9323372036854s"), TimeDelta::Max());
65 EXPECT_EQ(TimeDeltaFromString("-9323372036854s"), TimeDelta::Min());
66
67 // Multiple units.
68 EXPECT_EQ(TimeDeltaFromString("1d2h3m"), Days(1) + Hours(2) + Minutes(3));
69 EXPECT_EQ(TimeDeltaFromString("2h3m4s"), Hours(2) + Minutes(3) + Seconds(4));
70 EXPECT_EQ(TimeDeltaFromString("3m4s5us"),
71 Minutes(3) + Seconds(4) + Microseconds(5));
72 EXPECT_EQ(TimeDeltaFromString("2h3m4s5ms6us7ns"),
73 Hours(2) + Minutes(3) + Seconds(4) + Milliseconds(5) +
74 Microseconds(6) + Nanoseconds(7));
75
76 // Multiple units out of order.
77 EXPECT_EQ(TimeDeltaFromString("2us3m4s5h"),
78 Hours(5) + Minutes(3) + Seconds(4) + Microseconds(2));
79
80 // Fractional values of units.
81 EXPECT_EQ(TimeDeltaFromString("1.5ns"), 1.5 * Nanoseconds(1));
82 EXPECT_EQ(TimeDeltaFromString("1.5us"), 1.5 * Microseconds(1));
83 EXPECT_EQ(TimeDeltaFromString("1.5ms"), 1.5 * Milliseconds(1));
84 EXPECT_EQ(TimeDeltaFromString("1.5s"), 1.5 * Seconds(1));
85 EXPECT_EQ(TimeDeltaFromString("1.5m"), 1.5 * Minutes(1));
86 EXPECT_EQ(TimeDeltaFromString("1.5h"), 1.5 * Hours(1));
87 EXPECT_EQ(TimeDeltaFromString("1.5d"), 1.5 * Days(1));
88
89 // Huge fractional counts of a unit.
90 EXPECT_EQ(TimeDeltaFromString("0.4294967295s"),
91 Nanoseconds(429496729) + Nanoseconds(1) / 2);
92 EXPECT_EQ(TimeDeltaFromString("0.429496729501234567890123456789s"),
93 Nanoseconds(429496729) + Nanoseconds(1) / 2);
94
95 // Negative durations.
96 EXPECT_EQ(TimeDeltaFromString("-1s"), Seconds(-1));
97 EXPECT_EQ(TimeDeltaFromString("-1m"), Minutes(-1));
98 EXPECT_EQ(TimeDeltaFromString("-1h"), Hours(-1));
99 EXPECT_EQ(TimeDeltaFromString("-1d"), Days(-1));
100
101 EXPECT_EQ(TimeDeltaFromString("-1h2s"), -(Hours(1) + Seconds(2)));
102 EXPECT_EQ(TimeDeltaFromString("1h-2s"), std::nullopt);
103 EXPECT_EQ(TimeDeltaFromString("-1h-2s"), std::nullopt);
104 EXPECT_EQ(TimeDeltaFromString("-1h -2s"), std::nullopt);
105 }
106
107 } // namespace
108
109 } // namespace base
110