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50 lines
2.1 KiB
Zig
50 lines
2.1 KiB
Zig
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const cmp = @import("cmp.zig");
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const testing = @import("std").testing;
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fn test__ucmpdi2(a: u64, b: u64, expected: i32) !void {
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var result = cmp.__ucmpdi2(a, b);
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try testing.expectEqual(expected, result);
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}
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test "ucmpdi2" {
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// minInt == 0
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// maxInt == 18446744073709551615
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// minInt/2 == 0
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// maxInt/2 == 9223372036854775807
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// 1. equality minInt, minInt/2, 0, maxInt/2, maxInt
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try test__ucmpdi2(0, 0, 1);
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try test__ucmpdi2(1, 1, 1);
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try test__ucmpdi2(9223372036854775807, 9223372036854775807, 1);
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try test__ucmpdi2(18446744073709551614, 18446744073709551614, 1);
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try test__ucmpdi2(18446744073709551615, 18446744073709551615, 1);
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// 2. cmp minInt, {minInt + 1, maxInt/2, maxInt-1, maxInt}
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try test__ucmpdi2(0, 1, 0);
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try test__ucmpdi2(0, 9223372036854775807, 0);
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try test__ucmpdi2(0, 18446744073709551614, 0);
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try test__ucmpdi2(0, 18446744073709551615, 0);
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// 3. cmp minInt+1, {minInt, maxInt/2, maxInt-1, maxInt}
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try test__ucmpdi2(1, 0, 2);
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try test__ucmpdi2(1, 9223372036854775807, 0);
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try test__ucmpdi2(1, 18446744073709551614, 0);
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try test__ucmpdi2(1, 18446744073709551615, 0);
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// 4. cmp minInt/2, {}
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// 5. cmp -1, {}
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// 6. cmp 0, {}
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// 7. cmp 1, {}
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// 8. cmp maxInt/2, {minInt, minInt+1, maxInt-1, maxInt}
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try test__ucmpdi2(9223372036854775807, 0, 2);
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try test__ucmpdi2(9223372036854775807, 1, 2);
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try test__ucmpdi2(9223372036854775807, 18446744073709551614, 0);
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try test__ucmpdi2(9223372036854775807, 18446744073709551615, 0);
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// 9. cmp maxInt-1, {minInt, minInt + 1, maxInt/2, maxInt}
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try test__ucmpdi2(18446744073709551614, 0, 2);
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try test__ucmpdi2(18446744073709551614, 1, 2);
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try test__ucmpdi2(18446744073709551614, 9223372036854775807, 2);
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try test__ucmpdi2(18446744073709551614, 18446744073709551615, 0);
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// 10.cmp maxInt, {minInt, 1, maxInt/2, maxInt-1}
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try test__ucmpdi2(18446744073709551615, 0, 2);
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try test__ucmpdi2(18446744073709551615, 1, 2);
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try test__ucmpdi2(18446744073709551615, 9223372036854775807, 2);
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try test__ucmpdi2(18446744073709551615, 18446744073709551614, 2);
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}
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