it('correctly closes the channel even if another taker is active', done => {
const ch = chan(10, {
transducer: compose(
t.flatten(),
t.take(3)
)
});
const out = chan();
const ctrl = chan();
go(async () => {
for (const i of [0, 1, 2, 3, 4]) {
await put(ch, [i, i]);
}
await put(ctrl);
await put(ctrl);
});
go(async () => {
await take(ctrl);
await take(ch);
const value = await take(ch);
await put(out, value === CLOSED ? 'closed' : value);
});
go(async () => {
await take(ctrl);
await take(ch);
const value = await take(ch);
await put(out, value === CLOSED ? 'closed' : value);
});
go(async () => {
const value1 = await take(out);
const value2 = await take(out);
expect(value1 === 'closed' || value2 === 'closed').to.be.true;
expect(value1 === 'closed' && value2 === 'closed').to.be.false;
done();
});
});
it('handles composed transformers', done => {
const xform = compose(
t.map(x => x * 3),
t.filter(even),
t.take(3)
);
const ch = chan(10, { transducer: xform });
go(async () => {
for (const i of [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]) {
await put(ch, i);
}
});
go(async () => {
expect(await take(ch)).to.equal(0);
expect(await take(ch)).to.equal(6);
expect(await take(ch)).to.equal(24);
expect(await take(ch)).to.equal(CLOSED);
done();
});
});