1 // Copyright 2019 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 //
15 ////////////////////////////////////////////////////////////////////////////////
16
17 #include "tink/subtle/subtle_util.h"
18
19 #include <string>
20
21 #include "gmock/gmock.h"
22 #include "gtest/gtest.h"
23
24 namespace crypto {
25 namespace tink {
26 namespace subtle {
27
28 using ::testing::Eq;
29
TEST(SubtleUtilTest,Basic)30 TEST(SubtleUtilTest, Basic) {
31 std::string result = BigEndian32(0x12345678);
32 EXPECT_EQ(result[0], 0x12);
33 EXPECT_EQ(result[1], 0x34);
34 EXPECT_EQ(result[2], 0x56);
35 EXPECT_EQ(result[3], 0x78);
36 }
37
TEST(SubtleUtilTest,ResizeStringUninitialized)38 TEST(SubtleUtilTest, ResizeStringUninitialized) {
39 std::string s;
40 for (int len = 0; len <= 123; len += 17) {
41 int old_len = s.size();
42 ResizeStringUninitialized(&s, len);
43 for (int i = old_len; i < len; ++i) {
44 s[i] = 'a';
45 }
46 EXPECT_THAT(s, Eq(std::string(len, 'a')));
47 }
48 for (int len = 100; len >= 0; len -= 20) {
49 ResizeStringUninitialized(&s, len);
50 EXPECT_THAT(s, Eq(std::string(len, 'a')));
51 }
52 }
53
54 } // namespace subtle
55 } // namespace tink
56 } // namespace crypto
57