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test: add behaviour test for casting accross 32-bits boundary

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This commit is contained in:
Xavier Bouchoux 2023-10-08 11:36:53 +02:00
parent a9b37ac637
commit c86ba0f9d0
1 changed files with 93 additions and 0 deletions
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93
test/behavior/cast_int.zig
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@ -1,6 +1,7 @@
const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
const maxInt = std.math.maxInt;
test "@intCast i32 to u7" {
@ -28,3 +29,95 @@ test "coerce i8 to i32 and @intCast back" {
var y2: i8 = -5;
try expect(y2 == @as(i8, @intCast(x2)));
}
test "coerce non byte-sized integers accross 32bits boundary" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
{
var v: u21 = 6417;
const a: u32 = v;
const b: u64 = v;
const c: u64 = a;
var w: u64 = 0x1234567812345678;
const d: u21 = @truncate(w);
const e: u60 = d;
try expectEqual(@as(u32, 6417), a);
try expectEqual(@as(u64, 6417), b);
try expectEqual(@as(u64, 6417), c);
try expectEqual(@as(u21, 0x145678), d);
try expectEqual(@as(u60, 0x145678), e);
}
{
var v: u10 = 234;
const a: u32 = v;
const b: u64 = v;
const c: u64 = a;
var w: u64 = 0x1234567812345678;
const d: u10 = @truncate(w);
const e: u60 = d;
try expectEqual(@as(u32, 234), a);
try expectEqual(@as(u64, 234), b);
try expectEqual(@as(u64, 234), c);
try expectEqual(@as(u21, 0x278), d);
try expectEqual(@as(u60, 0x278), e);
}
{
var v: u7 = 11;
const a: u32 = v;
const b: u64 = v;
const c: u64 = a;
var w: u64 = 0x1234567812345678;
const d: u7 = @truncate(w);
const e: u60 = d;
try expectEqual(@as(u32, 11), a);
try expectEqual(@as(u64, 11), b);
try expectEqual(@as(u64, 11), c);
try expectEqual(@as(u21, 0x78), d);
try expectEqual(@as(u60, 0x78), e);
}
{
var v: i21 = -6417;
const a: i32 = v;
const b: i64 = v;
const c: i64 = a;
var w: i64 = -12345;
const d: i21 = @intCast(w);
const e: i60 = d;
try expectEqual(@as(i32, -6417), a);
try expectEqual(@as(i64, -6417), b);
try expectEqual(@as(i64, -6417), c);
try expectEqual(@as(i21, -12345), d);
try expectEqual(@as(i60, -12345), e);
}
{
var v: i10 = -234;
const a: i32 = v;
const b: i64 = v;
const c: i64 = a;
var w: i64 = -456;
const d: i10 = @intCast(w);
const e: i60 = d;
try expectEqual(@as(i32, -234), a);
try expectEqual(@as(i64, -234), b);
try expectEqual(@as(i64, -234), c);
try expectEqual(@as(i10, -456), d);
try expectEqual(@as(i60, -456), e);
}
{
var v: i7 = -11;
const a: i32 = v;
const b: i64 = v;
const c: i64 = a;
var w: i64 = -42;
const d: i7 = @intCast(w);
const e: i60 = d;
try expectEqual(@as(i32, -11), a);
try expectEqual(@as(i64, -11), b);
try expectEqual(@as(i64, -11), c);
try expectEqual(@as(i7, -42), d);
try expectEqual(@as(i60, -42), e);
}
}