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37 * Tests for routines for computing MD5 sums on files.
39 * \author Mark Abraham <mark.j.abraham@gmail.com>
40 * \ingroup module_fileio
51 #include <gmock/gmock.h>
52 #include <gtest/gtest.h>
54 #include "gromacs/fileio/gmxfio.h"
55 #include "gromacs/utility/arrayref.h"
57 #include "testutils/refdata.h"
58 #include "testutils/testfilemanager.h"
67 class FileMD5Test : public ::testing::Test
70 void prepareFile(int lengthInBytes)
72 // Fill some memory with some arbitrary bits.
73 std::vector<char> data(lengthInBytes);
74 std::iota(data.begin(), data.end(), 1);
75 // Binary mode ensures it works the same on all OS
76 FILE* fp = fopen(filename_.c_str(), "wb");
77 fwrite(data.data(), sizeof(char), data.size(), fp);
80 ~FileMD5Test() override
87 TestFileManager fileManager_;
88 // Make sure the file extension is one that gmx_fio_open will
89 // recognize to open as binary.
90 std::string filename_ = fileManager_.getTemporaryFilePath("data.edr");
91 t_fileio* file_ = nullptr;
94 TEST_F(FileMD5Test, CanComputeMD5)
97 file_ = gmx_fio_open(filename_.c_str(), "r+");
99 std::array<unsigned char, 16> digest = { 0 };
100 // Chosen to be less than the full file length
101 gmx_off_t offset = 64;
102 gmx_off_t expectedLength = 64;
103 gmx_off_t lengthActuallyRead = gmx_fio_get_file_md5(file_, offset, &digest);
105 EXPECT_EQ(expectedLength, lengthActuallyRead);
106 // Did we compute an actual reproducible checksum?
107 auto total = std::accumulate(digest.begin(), digest.end(), 0);
108 EXPECT_EQ(2111, total);
111 TEST_F(FileMD5Test, ReturnsErrorIfFileModeIsWrong)
114 file_ = gmx_fio_open(filename_.c_str(), "r");
116 std::array<unsigned char, 16> digest;
117 gmx_off_t offset = 100;
118 gmx_off_t lengthActuallyRead = gmx_fio_get_file_md5(file_, offset, &digest);
119 EXPECT_EQ(-1, lengthActuallyRead);