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cmpsi2_test.zig (4815B) - Raw

      1 const cmp = @import("cmp.zig");
      2 const testing = @import("std").testing;
      3 
      4 fn test__cmpsi2(a: i32, b: i32, expected: i32) !void {
      5     const result = cmp.__cmpsi2(a, b);
      6     try testing.expectEqual(expected, result);
      7 }
      8 
      9 test "cmpsi2" {
     10     // minInt == -2147483648
     11     // maxInt == 2147483647
     12     // minInt/2 == -1073741824
     13     // maxInt/2 == 1073741823
     14     // 1. equality minInt, minInt+1, minInt/2, -1, 0, 1, maxInt/2, maxInt-1, maxInt
     15     try test__cmpsi2(-2147483648, -2147483648, 1);
     16     try test__cmpsi2(-2147483647, -2147483647, 1);
     17     try test__cmpsi2(-1073741824, -1073741824, 1);
     18     try test__cmpsi2(-1, -1, 1);
     19     try test__cmpsi2(0, 0, 1);
     20     try test__cmpsi2(1, 1, 1);
     21     try test__cmpsi2(1073741823, 1073741823, 1);
     22     try test__cmpsi2(2147483646, 2147483646, 1);
     23     try test__cmpsi2(2147483647, 2147483647, 1);
     24     // 2. cmp minInt,   {        minInt + 1, minInt/2, -1,0,1, maxInt/2, maxInt-1, maxInt}
     25     try test__cmpsi2(-2147483648, -2147483647, 0);
     26     try test__cmpsi2(-2147483648, -1073741824, 0);
     27     try test__cmpsi2(-2147483648, -1, 0);
     28     try test__cmpsi2(-2147483648, 0, 0);
     29     try test__cmpsi2(-2147483648, 1, 0);
     30     try test__cmpsi2(-2147483648, 1073741823, 0);
     31     try test__cmpsi2(-2147483648, 2147483646, 0);
     32     try test__cmpsi2(-2147483648, 2147483647, 0);
     33     // 3. cmp minInt+1, {minInt,             minInt/2, -1,0,1, maxInt/2, maxInt-1, maxInt}
     34     try test__cmpsi2(-2147483647, -2147483648, 2);
     35     try test__cmpsi2(-2147483647, -1073741824, 0);
     36     try test__cmpsi2(-2147483647, -1, 0);
     37     try test__cmpsi2(-2147483647, 0, 0);
     38     try test__cmpsi2(-2147483647, 1, 0);
     39     try test__cmpsi2(-2147483647, 1073741823, 0);
     40     try test__cmpsi2(-2147483647, 2147483646, 0);
     41     try test__cmpsi2(-2147483647, 2147483647, 0);
     42     // 4. cmp minInt/2, {minInt, minInt + 1,           -1,0,1, maxInt/2, maxInt-1, maxInt}
     43     try test__cmpsi2(-1073741824, -2147483648, 2);
     44     try test__cmpsi2(-1073741824, -2147483647, 2);
     45     try test__cmpsi2(-1073741824, -1, 0);
     46     try test__cmpsi2(-1073741824, 0, 0);
     47     try test__cmpsi2(-1073741824, 1, 0);
     48     try test__cmpsi2(-1073741824, 1073741823, 0);
     49     try test__cmpsi2(-1073741824, 2147483646, 0);
     50     try test__cmpsi2(-1073741824, 2147483647, 0);
     51     // 5. cmp -1,       {minInt, minInt + 1, minInt/2,    0,1, maxInt/2, maxInt-1, maxInt}
     52     try test__cmpsi2(-1, -2147483648, 2);
     53     try test__cmpsi2(-1, -2147483647, 2);
     54     try test__cmpsi2(-1, -1073741824, 2);
     55     try test__cmpsi2(-1, 0, 0);
     56     try test__cmpsi2(-1, 1, 0);
     57     try test__cmpsi2(-1, 1073741823, 0);
     58     try test__cmpsi2(-1, 2147483646, 0);
     59     try test__cmpsi2(-1, 2147483647, 0);
     60     // 6. cmp 0,        {minInt, minInt + 1, minInt/2, -1,  1, maxInt/2, maxInt-1, maxInt}
     61     try test__cmpsi2(0, -2147483648, 2);
     62     try test__cmpsi2(0, -2147483647, 2);
     63     try test__cmpsi2(0, -1073741824, 2);
     64     try test__cmpsi2(0, -1, 2);
     65     try test__cmpsi2(0, 1, 0);
     66     try test__cmpsi2(0, 1073741823, 0);
     67     try test__cmpsi2(0, 2147483646, 0);
     68     try test__cmpsi2(0, 2147483647, 0);
     69     // 7. cmp 1,        {minInt, minInt + 1, minInt/2, -1,0,  maxInt/2, maxInt-1, maxInt}
     70     try test__cmpsi2(1, -2147483648, 2);
     71     try test__cmpsi2(1, -2147483647, 2);
     72     try test__cmpsi2(1, -1073741824, 2);
     73     try test__cmpsi2(1, -1, 2);
     74     try test__cmpsi2(1, 0, 2);
     75     try test__cmpsi2(1, 1073741823, 0);
     76     try test__cmpsi2(1, 2147483646, 0);
     77     try test__cmpsi2(1, 2147483647, 0);
     78     // 8. cmp maxInt/2, {minInt, minInt + 1, minInt/2, -1, 0, 1,          maxInt-1, maxInt}
     79     try test__cmpsi2(1073741823, -2147483648, 2);
     80     try test__cmpsi2(1073741823, -2147483647, 2);
     81     try test__cmpsi2(1073741823, -1073741824, 2);
     82     try test__cmpsi2(1073741823, -1, 2);
     83     try test__cmpsi2(1073741823, 0, 2);
     84     try test__cmpsi2(1073741823, 1, 2);
     85     try test__cmpsi2(1073741823, 2147483646, 0);
     86     try test__cmpsi2(1073741823, 2147483647, 0);
     87     // 9. cmp maxInt-1, {minInt, minInt + 1, minInt/2, -1, 0, 1, maxInt/2,           maxInt}
     88     try test__cmpsi2(2147483646, -2147483648, 2);
     89     try test__cmpsi2(2147483646, -2147483647, 2);
     90     try test__cmpsi2(2147483646, -1073741824, 2);
     91     try test__cmpsi2(2147483646, -1, 2);
     92     try test__cmpsi2(2147483646, 0, 2);
     93     try test__cmpsi2(2147483646, 1, 2);
     94     try test__cmpsi2(2147483646, 1073741823, 2);
     95     try test__cmpsi2(2147483646, 2147483647, 0);
     96     // 10.cmp maxInt,   {minInt, minInt + 1, minInt/2, -1, 0, 1, maxInt/2, maxInt-1,       }
     97     try test__cmpsi2(2147483647, -2147483648, 2);
     98     try test__cmpsi2(2147483647, -2147483647, 2);
     99     try test__cmpsi2(2147483647, -1073741824, 2);
    100     try test__cmpsi2(2147483647, -1, 2);
    101     try test__cmpsi2(2147483647, 0, 2);
    102     try test__cmpsi2(2147483647, 1, 2);
    103     try test__cmpsi2(2147483647, 1073741823, 2);
    104     try test__cmpsi2(2147483647, 2147483646, 2);
    105 }