LCOV - code coverage report
Current view: top level - tests/src - test0025.c (source / functions) Coverage Total Hit
Test: coverage.info Lines: 96.6 % 59 57
Test Date: 2026-03-01 04:31:48 Functions: 100.0 % 8 8
Branches: 44.0 % 109 48

             Branch data     Line data    Source code
       1                 :             : #include "sute.h"
       2                 :             : #include <unistd.h>
       3                 :             : 
       4                 :             : // Test-only hook for sysconf() to control outputs in file_buffer_memory().
       5                 :             : // Macro in file_buffer_memory.c (under TESTITALL) aliases sysconf() to
       6                 :             : // test_sysconf() so only that code path is affected. No delegation to
       7                 :             : // the real libc sysconf is needed here.
       8                 :             : static long mock_avphys_pages = 0;   // _SC_AVPHYS_PAGES
       9                 :             : static long mock_page_size = 0;      // _SC_PAGESIZE
      10                 :             : 
      11                 :         239 : long testitall_sysconf(int name)
      12                 :             : {
      13      [ +  +  - ]:         239 :         switch(name)
      14                 :             :         {
      15                 :             : #ifdef _SC_AVPHYS_PAGES
      16                 :         120 :                 case _SC_AVPHYS_PAGES:
      17                 :             : #elif defined(_SC_PHYS_PAGES)
      18                 :             :                 // Fallback for platforms without _SC_AVPHYS_PAGES — use total pages
      19                 :             :                 case _SC_PHYS_PAGES:
      20                 :             : #endif
      21                 :         120 :                         return mock_avphys_pages;
      22                 :         119 :                 case _SC_PAGESIZE:
      23                 :         119 :                         return mock_page_size;
      24                 :           0 :                 default:
      25                 :             :                         // Unknown names are not expected in these tests
      26                 :           0 :                         return -1;
      27                 :             :         }
      28                 :             : }
      29                 :             : 
      30                 :           1 : static Return test0025_1(void)
      31                 :             : {
      32                 :           1 :         INITTEST;
      33                 :           1 :         mock_avphys_pages = -1; // Simulate sysconf failure for pages
      34                 :           1 :         mock_page_size = 4096; // Any value (won't be used)
      35                 :             : 
      36                 :           1 :         size_t result = file_buffer_memory();
      37   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)(1024*1024));
      38   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      39                 :             : }
      40                 :             : 
      41                 :           1 : static Return test0025_2(void)
      42                 :             : {
      43                 :           1 :         INITTEST;
      44                 :           1 :         mock_avphys_pages = 1000;
      45                 :           1 :         mock_page_size = -1;  // Simulate sysconf failure for page size
      46                 :             : 
      47                 :           1 :         size_t result = file_buffer_memory();
      48   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)(1024*1024));
      49   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      50                 :             : }
      51                 :             : 
      52                 :           1 : static Return test0025_3(void)
      53                 :             : {
      54                 :           1 :         INITTEST;
      55                 :           1 :         mock_avphys_pages = 0;
      56                 :           1 :         mock_page_size = 4096;
      57                 :             : 
      58                 :           1 :         size_t result = file_buffer_memory();
      59   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)0);
      60   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      61                 :             : }
      62                 :             : 
      63                 :           1 : static Return test0025_4(void)
      64                 :             : {
      65                 :           1 :         INITTEST;
      66                 :           1 :         mock_avphys_pages = 12345;
      67                 :           1 :         mock_page_size = 0;
      68                 :             : 
      69                 :           1 :         size_t result = file_buffer_memory();
      70   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)0);
      71   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      72                 :             : }
      73                 :             : 
      74                 :           1 : static Return test0025_5(void)
      75                 :             : {
      76                 :           1 :         INITTEST;
      77                 :             :         // 1% of 12,345 is 123 (integer division)
      78                 :           1 :         mock_avphys_pages = 12345;
      79                 :           1 :         mock_page_size = 1;
      80                 :             : 
      81                 :           1 :         size_t result = file_buffer_memory();
      82   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)123);
      83   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      84                 :             : }
      85                 :             : 
      86                 :           1 : static Return test0025_6(void)
      87                 :             : {
      88                 :           1 :         INITTEST;
      89                 :             :         // 1% of (1,000,000 * 4096) = 40,960,000
      90                 :           1 :         mock_avphys_pages = 1000000;
      91                 :           1 :         mock_page_size = 4096;
      92                 :             : 
      93                 :           1 :         size_t result = file_buffer_memory();
      94   [ +  -  +  - ]:           1 :         ASSERT(result == (size_t)40960000);
      95   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
      96                 :             : }
      97                 :             : 
      98                 :             : /**
      99                 :             :  * @brief Unit tests for file_buffer_memory().
     100                 :             :  *
     101                 :             :  * @details
     102                 :             :  * - In TESTITALL builds, sysconf() inside file_buffer_memory() is macro-aliased
     103                 :             :  *   to test_sysconf(), which supplies controlled values for _SC_AVPHYS_PAGES and
     104                 :             :  *   _SC_PAGESIZE. Any other name returns -1 and is not used in these tests.
     105                 :             :  * - Each subtest sets mock_avphys_pages and mock_page_size to drive scenarios:
     106                 :             :  *   sysconf failures (expect default 1 MiB), zero inputs (expect 0), tiny product
     107                 :             :  *   to observe integer-division truncation, and a normal 1% calculation for large
     108                 :             :  *   inputs.
     109                 :             :  * - ASSERT checks the returned size against the expected value; TEST aggregates
     110                 :             :  *   subtests and reports status via the testitall harness.
     111                 :             :  */
     112                 :           1 : Return test0025(void)
     113                 :             : {
     114                 :           1 :         INITTEST;
     115                 :             : 
     116         [ +  - ]:           1 :         TEST(test0025_1,"file_buffer_memory: returns default on pages failure…");
     117         [ +  - ]:           1 :         TEST(test0025_2,"file_buffer_memory: returns default on page size failure…");
     118         [ +  - ]:           1 :         TEST(test0025_3,"file_buffer_memory: 0 pages yields 0…");
     119         [ +  - ]:           1 :         TEST(test0025_4,"file_buffer_memory: 0 page size yields 0…");
     120         [ +  - ]:           1 :         TEST(test0025_5,"file_buffer_memory: integer division rounding down…");
     121         [ +  - ]:           1 :         TEST(test0025_6,"file_buffer_memory: normal case computation…");
     122                 :             : 
     123   [ +  -  -  +  :           1 :         RETURN_STATUS;
          -  -  -  +  +  
                      - ]
     124                 :             : }
        

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