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comparison: toolkit/crashreporter/google-breakpad/src/common/linux/safe_readlink_unittest.cc
toolkit/crashreporter/google-breakpad/src/common/linux/safe_readlink_unittest.cc
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| 1 // Copyright (c) 2011, Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 // safe_readlink_unittest.cc: Unit tests for google_breakpad::SafeReadLink. | |
| 31 | |
| 32 #include "breakpad_googletest_includes.h" | |
| 33 #include "common/linux/safe_readlink.h" | |
| 34 | |
| 35 using google_breakpad::SafeReadLink; | |
| 36 | |
| 37 TEST(SafeReadLinkTest, ZeroBufferSize) { | |
| 38 char buffer[1]; | |
| 39 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 0)); | |
| 40 } | |
| 41 | |
| 42 TEST(SafeReadLinkTest, BufferSizeTooSmall) { | |
| 43 char buffer[1]; | |
| 44 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 1)); | |
| 45 } | |
| 46 | |
| 47 TEST(SafeReadLinkTest, BoundaryBufferSize) { | |
| 48 char buffer[PATH_MAX]; | |
| 49 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer, sizeof(buffer))); | |
| 50 size_t path_length = strlen(buffer); | |
| 51 EXPECT_LT(0U, path_length); | |
| 52 EXPECT_GT(sizeof(buffer), path_length); | |
| 53 | |
| 54 // Buffer size equals to the expected path length plus 1 for the NULL byte. | |
| 55 char buffer2[PATH_MAX]; | |
| 56 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2, path_length + 1)); | |
| 57 EXPECT_EQ(path_length, strlen(buffer2)); | |
| 58 EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); | |
| 59 | |
| 60 // Buffer size equals to the expected path length. | |
| 61 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, path_length)); | |
| 62 } | |
| 63 | |
| 64 TEST(SafeReadLinkTest, NonexistentPath) { | |
| 65 char buffer[PATH_MAX]; | |
| 66 EXPECT_FALSE(SafeReadLink("nonexistent_path", buffer, sizeof(buffer))); | |
| 67 } | |
| 68 | |
| 69 TEST(SafeReadLinkTest, NonSymbolicLinkPath) { | |
| 70 char actual_path[PATH_MAX]; | |
| 71 EXPECT_TRUE(SafeReadLink("/proc/self/exe", actual_path, sizeof(actual_path))); | |
| 72 | |
| 73 char buffer[PATH_MAX]; | |
| 74 EXPECT_FALSE(SafeReadLink(actual_path, buffer, sizeof(buffer))); | |
| 75 } | |
| 76 | |
| 77 TEST(SafeReadLinkTest, DeduceBufferSizeFromCharArray) { | |
| 78 char buffer[PATH_MAX]; | |
| 79 char* buffer_pointer = buffer; | |
| 80 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer_pointer, sizeof(buffer))); | |
| 81 size_t path_length = strlen(buffer); | |
| 82 | |
| 83 // Use the template version of SafeReadLink to deduce the buffer size | |
| 84 // from the char array. | |
| 85 char buffer2[PATH_MAX]; | |
| 86 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2)); | |
| 87 EXPECT_EQ(path_length, strlen(buffer2)); | |
| 88 EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); | |
| 89 } |
