zig/test/behavior/translate_c_macros.zig

const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;

const h = @cImport(@cInclude("behavior/translate_c_macros.h"));

test "casting to void with a macro" {
    h.IGNORE_ME_1(42);
    h.IGNORE_ME_2(42);
    h.IGNORE_ME_3(42);
    h.IGNORE_ME_4(42);
    h.IGNORE_ME_5(42);
    h.IGNORE_ME_6(42);
    h.IGNORE_ME_7(42);
    h.IGNORE_ME_8(42);
    h.IGNORE_ME_9(42);
    h.IGNORE_ME_10(42);
}

test "initializer list expression" {
    if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO

    try expectEqual(h.Color{
        .r = 200,
        .g = 200,
        .b = 200,
        .a = 255,
    }, h.LIGHTGRAY);
}

test "sizeof in macros" {
    try expect(@as(c_int, @sizeOf(u32)) == h.MY_SIZEOF(u32));
    try expect(@as(c_int, @sizeOf(u32)) == h.MY_SIZEOF2(u32));
}

test "reference to a struct type" {
    try expect(@sizeOf(h.struct_Foo) == h.SIZE_OF_FOO);
}

test "cast negative integer to pointer" {
    if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO

    try expectEqual(@intToPtr(?*anyopaque, @bitCast(usize, @as(isize, -1))), h.MAP_FAILED);
}

test "casting to union with a macro" {
    if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO Sema.zirUnionInitPtr

    const l: c_long = 42;
    const d: f64 = 2.0;

    var casted = h.UNION_CAST(l);
    try expectEqual(l, casted.l);

    casted = h.UNION_CAST(d);
    try expectEqual(d, casted.d);
}