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span_util_unittest.cpp
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1// Copyright 2021 The PDFium 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 "core/fxcrt/span_util.h"
6
7#include <vector>
8
9#include "testing/gmock/include/gmock/gmock.h"
10#include "testing/gtest/include/gtest/gtest.h"
11
12TEST(Spancpy, FitsEntirely) {
13 std::vector<char> src(4, 'A');
14 std::vector<char> dst(4, 'B');
15 auto remain = fxcrt::spancpy(pdfium::make_span(dst), pdfium::make_span(src));
16 EXPECT_EQ(dst[0], 'A');
17 EXPECT_EQ(dst[1], 'A');
18 EXPECT_EQ(dst[2], 'A');
19 EXPECT_EQ(dst[3], 'A');
20 EXPECT_TRUE(remain.empty());
21}
22
23TEST(Spancpy, FitsWithin) {
24 std::vector<char> src(2, 'A');
25 std::vector<char> dst(4, 'B');
26 // Also show that a const src argument is acceptable.
27 auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(1),
28 pdfium::span<const char>(src));
29 EXPECT_EQ(dst[0], 'B');
30 EXPECT_EQ(dst[1], 'A');
31 EXPECT_EQ(dst[2], 'A');
32 EXPECT_EQ(dst[3], 'B');
33 EXPECT_EQ(remain.size(), 1u);
34 EXPECT_EQ(remain.data(), &dst[3]);
35}
36
37TEST(Spancpy, EmptyCopyWithin) {
38 std::vector<char> src(2, 'A');
39 std::vector<char> dst(4, 'B');
40 auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(1),
41 pdfium::make_span(src).subspan(2));
42 EXPECT_EQ(dst[0], 'B');
43 EXPECT_EQ(dst[1], 'B');
44 EXPECT_EQ(dst[2], 'B');
45 EXPECT_EQ(dst[3], 'B');
46 EXPECT_EQ(remain.size(), 3u);
47 EXPECT_EQ(remain.data(), &dst[1]);
48}
49
50TEST(Spancpy, EmptyCopyToEmpty) {
51 std::vector<char> src(2, 'A');
52 std::vector<char> dst(4, 'B');
53 auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(4),
54 pdfium::make_span(src).subspan(2));
55 EXPECT_EQ(dst[0], 'B');
56 EXPECT_EQ(dst[1], 'B');
57 EXPECT_EQ(dst[2], 'B');
58 EXPECT_EQ(dst[3], 'B');
59 EXPECT_TRUE(remain.empty());
60}
61
62TEST(Spancpy, TryFitsEntirely) {
63 std::vector<char> src(4, 'A');
64 std::vector<char> dst(4, 'B');
65 EXPECT_TRUE(
66 fxcrt::try_spancpy(pdfium::make_span(dst), pdfium::make_span(src)));
67 EXPECT_EQ(dst[0], 'A');
68 EXPECT_EQ(dst[1], 'A');
69 EXPECT_EQ(dst[2], 'A');
70 EXPECT_EQ(dst[3], 'A');
71}
72
73TEST(Spancpy, TryDoesNotFit) {
74 std::vector<char> src(4, 'A');
75 std::vector<char> dst(3, 'B');
76 EXPECT_FALSE(
77 fxcrt::try_spancpy(pdfium::make_span(dst), pdfium::make_span(src)));
78 EXPECT_EQ(dst[0], 'B');
79 EXPECT_EQ(dst[1], 'B');
80 EXPECT_EQ(dst[2], 'B');
81}
82
83TEST(Spanmove, FitsWithin) {
84 std::vector<char> src(2, 'A');
85 std::vector<char> dst(4, 'B');
86 // Also show that a const src argument is acceptable.
87 auto remain = fxcrt::spanmove(pdfium::make_span(dst).subspan(1),
88 pdfium::span<const char>(src));
89 EXPECT_EQ(dst[0], 'B');
90 EXPECT_EQ(dst[1], 'A');
91 EXPECT_EQ(dst[2], 'A');
92 EXPECT_EQ(dst[3], 'B');
93 EXPECT_EQ(remain.size(), 1u);
94 EXPECT_EQ(remain.data(), &dst[3]);
95}
96
97TEST(Spanmove, TryFitsEntirely) {
98 std::vector<char> src(4, 'A');
99 std::vector<char> dst(4, 'B');
100 EXPECT_TRUE(
101 fxcrt::try_spanmove(pdfium::make_span(dst), pdfium::make_span(src)));
102 EXPECT_EQ(dst[0], 'A');
103 EXPECT_EQ(dst[1], 'A');
104 EXPECT_EQ(dst[2], 'A');
105 EXPECT_EQ(dst[3], 'A');
106}
107
108TEST(Spanmove, TrySelfIntersect) {
109 {
110 std::vector<char> vec = {'A', 'B', 'C', 'D'};
111 EXPECT_TRUE(fxcrt::try_spanmove(pdfium::make_span(vec).first(3),
112 pdfium::make_span(vec).last(3)));
113 EXPECT_EQ(vec[0], 'B');
114 EXPECT_EQ(vec[1], 'C');
115 EXPECT_EQ(vec[2], 'D');
116 EXPECT_EQ(vec[3], 'D');
117 }
118 {
119 std::vector<char> vec = {'A', 'B', 'C', 'D'};
120 EXPECT_TRUE(fxcrt::try_spanmove(pdfium::make_span(vec).last(3),
121 pdfium::make_span(vec).first(3)));
122 EXPECT_EQ(vec[0], 'A');
123 EXPECT_EQ(vec[1], 'A');
124 EXPECT_EQ(vec[2], 'B');
125 EXPECT_EQ(vec[3], 'C');
126 }
127}
128
129TEST(Spanmove, TryDoesNotFit) {
130 std::vector<char> src(4, 'A');
131 std::vector<char> dst(3, 'B');
132 EXPECT_FALSE(
133 fxcrt::try_spanmove(pdfium::make_span(dst), pdfium::make_span(src)));
134 EXPECT_EQ(dst[0], 'B');
135 EXPECT_EQ(dst[1], 'B');
136 EXPECT_EQ(dst[2], 'B');
137}
138
139TEST(SpanEquals, Empty) {
140 std::vector<int> vec = {1, 2};
141 std::vector<int> vec2 = {3, 4};
142 pdfium::span<int> empty;
143 pdfium::span<int> some = pdfium::make_span(vec);
144 pdfium::span<int> some2 = pdfium::make_span(vec2);
145 EXPECT_FALSE(fxcrt::span_equals(empty, some));
146 EXPECT_FALSE(fxcrt::span_equals(some, empty));
147 EXPECT_TRUE(fxcrt::span_equals(empty, empty));
148 EXPECT_TRUE(fxcrt::span_equals(empty, some.first(0)));
149 EXPECT_TRUE(fxcrt::span_equals(some.first(0), empty));
150 EXPECT_TRUE(fxcrt::span_equals(some2.first(0), some.first(0)));
151 EXPECT_TRUE(fxcrt::span_equals(some.first(0), some2.first(0)));
152}
153
154TEST(SpanEquals, NonEmpty) {
155 std::vector<int> vec = {1, 2, 3};
156 std::vector<int> vec2 = {1, 2, 4};
157 pdfium::span<int> some = pdfium::make_span(vec);
158 pdfium::span<int> some2 = pdfium::make_span(vec2);
159 EXPECT_FALSE(fxcrt::span_equals(some, some2));
160 EXPECT_FALSE(fxcrt::span_equals(some.first(2), some2));
161 EXPECT_FALSE(fxcrt::span_equals(some, some2.first(2)));
162 EXPECT_TRUE(fxcrt::span_equals(some.first(2), some2.first(2)));
163}
164
165TEST(Span, AssignOverOnePastEnd) {
166 std::vector<char> src(2, 'A');
167 pdfium::span<char> span = pdfium::make_span(src);
168 span = span.subspan(2);
169 span = pdfium::make_span(src);
170 EXPECT_EQ(span.size(), 2u);
171}
172
173TEST(ReinterpretSpan, Empty) {
174 pdfium::span<uint8_t> empty;
175 pdfium::span<uint32_t> converted = fxcrt::reinterpret_span<uint32_t>(empty);
176 EXPECT_EQ(converted.data(), nullptr);
177 EXPECT_EQ(converted.size(), 0u);
178}
179
180TEST(ReinterpretSpan, LegalConversions) {
181 uint8_t aaaabbbb[8] = {0x61, 0x61, 0x61, 0x61, 0x62, 0x62, 0x62, 0x62};
182 pdfium::span<uint8_t> original = pdfium::make_span(aaaabbbb);
183 pdfium::span<uint32_t> converted =
184 fxcrt::reinterpret_span<uint32_t>(original);
185 ASSERT_NE(converted.data(), nullptr);
186 ASSERT_EQ(converted.size(), 2u);
187 EXPECT_EQ(converted[0], 0x61616161u);
188 EXPECT_EQ(converted[1], 0x62626262u);
189}
190
191TEST(ReinterpretSpan, BadAlignment) {
192 uint8_t abcabc[6] = {0x61, 0x62, 0x63, 0x61, 0x62, 0x63};
193 EXPECT_DEATH(fxcrt::reinterpret_span<uint32_t>(
194 pdfium::make_span(abcabc).subspan(1, 4)),
195 "");
196}
197
198TEST(Spanpos, Empty) {
199 pdfium::span<const uint32_t> kEmpty;
200 const uint32_t kHaystack[] = {0, 1, 2, 3, 4, 5};
201 const uint32_t kNeedle[] = {1, 2};
202 EXPECT_FALSE(fxcrt::spanpos(kEmpty, kEmpty));
203 EXPECT_FALSE(fxcrt::spanpos(pdfium::make_span(kHaystack), kEmpty));
204 EXPECT_FALSE(fxcrt::spanpos(kEmpty, pdfium::make_span(kNeedle)));
205}
206
207TEST(Spanpos, NotEmpty) {
208 const uint32_t kHaystack[] = {0, 1, 2, 3, 4, 5};
209 const uint32_t kStartMatch[] = {0, 1};
210 const uint32_t kEndMatch[] = {4, 5};
211 const uint32_t kNotFound[] = {256, 512}; // test byte-shifted {1,2}.
212 const uint32_t kTooLong[] = {0, 1, 2, 3, 4, 5, 6};
213 EXPECT_THAT(fxcrt::spanpos(pdfium::make_span(kHaystack),
214 pdfium::make_span(kStartMatch)),
215 testing::Optional(0u));
216 EXPECT_THAT(fxcrt::spanpos(pdfium::make_span(kHaystack),
217 pdfium::make_span(kEndMatch)),
218 testing::Optional(4u));
219 EXPECT_FALSE(fxcrt::spanpos(pdfium::make_span(kHaystack),
220 pdfium::make_span(kNotFound)));
221 EXPECT_FALSE(fxcrt::spanpos(pdfium::make_span(kHaystack),
222 pdfium::make_span(kTooLong)));
223}
TEST
TEST(FXCRYPT, MD5GenerateEmtpyData)
Definition fx_crypt_unittest.cpp:50