1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* Copyright (c) 2021 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "logging/rtc_event_log/events/rtc_event_field_extraction.h"
#include "rtc_base/random.h"
#include "test/gtest.h"
namespace webrtc {
TEST(UnsignedBitWidthTest, SmallValues) {
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(0), 1u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(1), 1u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(2), 2u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(3), 2u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(4), 3u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(5), 3u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(6), 3u);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(7), 3u);
}
TEST(UnsignedBitWidthTest, PowersOfTwo) {
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(0), 1u);
for (unsigned i = 0; i < 64; i++) {
uint64_t x = 1;
x = x << i;
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(x), i + 1);
}
}
TEST(UnsignedBitWidthTest, PowersOfTwoMinusOne) {
for (unsigned i = 1; i < 64; i++) {
uint64_t x = 1;
x = (x << i) - 1;
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(x), i);
}
uint64_t x = ~static_cast<uint64_t>(0);
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(x), 64u);
}
TEST(UnsignedBitWidthTest, RandomInputs) {
Random rand(12345);
for (unsigned i = 0; i < 64; i++) {
uint64_t x = 1;
x = x << i;
uint64_t high = rand.Rand<uint32_t>();
uint64_t low = rand.Rand<uint32_t>();
x += ((high << 32) + low) % x;
EXPECT_EQ(webrtc_event_logging::UnsignedBitWidth(x), i + 1);
}
}
TEST(SignedBitWidthTest, SignedBitWidth) {
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(0, 1), 1u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(1, 0), 2u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(1, 2), 2u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(1, 128), 8u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(127, 1), 8u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(127, 128), 8u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(1, 129), 9u);
EXPECT_EQ(webrtc_event_logging::SignedBitWidth(128, 1), 9u);
}
TEST(MaxUnsignedValueOfBitWidthTest, MaxUnsignedValueOfBitWidth) {
EXPECT_EQ(webrtc_event_logging::MaxUnsignedValueOfBitWidth(1), 0x01u);
EXPECT_EQ(webrtc_event_logging::MaxUnsignedValueOfBitWidth(6), 0x3Fu);
EXPECT_EQ(webrtc_event_logging::MaxUnsignedValueOfBitWidth(8), 0xFFu);
EXPECT_EQ(webrtc_event_logging::MaxUnsignedValueOfBitWidth(32), 0xFFFFFFFFu);
}
TEST(EncodeAsUnsignedTest, NegativeValues) {
// Negative values are converted as if cast to unsigned type of
// the same bitsize using 2-complement representation.
int16_t x = -1;
EXPECT_EQ(EncodeAsUnsigned(x), static_cast<uint64_t>(0xFFFF));
int64_t y = -1;
EXPECT_EQ(EncodeAsUnsigned(y), static_cast<uint64_t>(0xFFFFFFFFFFFFFFFFull));
}
TEST(EncodeAsUnsignedTest, PositiveValues) {
// Postive values are unchanged.
int16_t x = 42;
EXPECT_EQ(EncodeAsUnsigned(x), static_cast<uint64_t>(42));
int64_t y = 42;
EXPECT_EQ(EncodeAsUnsigned(y), static_cast<uint64_t>(42));
}
} // namespace webrtc
|
