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use magnus::{eval, method, rb_assert, Error, Ruby, Value};
fn flipflop(ruby: &Ruby, _rb_self: Value, mut val: bool) -> Result<(), Error> {
val = ruby.yield_value(val)?;
loop {
val = ruby.yield_value(!val)?;
}
}
#[test]
fn it_yields() {
let ruby = unsafe { magnus::embed::init() };
ruby.define_global_function("flipflop", method!(flipflop, 1));
let values = ruby.ary_new();
let i: Value = eval!(
ruby,
"
i = 0
flipflop(true) do |val|
values << val
i += 1 if val
break if i > 5
val
end
i
",
values
)
.unwrap();
rb_assert!(ruby, "i == 6 && values == [true, false, true, false, true, false, true, false, true, false, true]", i, values);
}
|
