Using expectEqual
Is this the best way to use expectEqual?
fn add(a: i64, b: i64) i64 {
return a + b;
}
test "basic test" {
try std.testing.expectEqual(@as(i64, 10), add(3, 7));
}
Without the @as the test doesn't even compile:
./src/main.zig:12:40: error: expected type 'comptime_int', found 'i64'
try std.testing.expectEqual(10, add(3, 7));
Having to use @as seems makes the test less readable. It seems to me inferring the type of expected from the type of actual would make more sense.
4 replies
Should work if "10" is also declared as a variable with type "i64" I think?
Sure, you could do:
Is there a way to write an
i64literal?If we look at the signature
expectEqual(expected: anytype, actual: @TypeOf(expected)) !void, notice that the second arg's type depends on the first arg's type.To avoid using
@ascoercion, we can just swap the passing arguments.comptime_intcan be inferred asi64, not the other way around. And that makes sense because literal values are unsized.Did you try casting like this? Doesn't read any better though.