mozilla-central/testing/web-platform/tests/streams/readable-streams/count-queuing-strategy-integration.any.js (file symbol)

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// META: global=window,worker,shadowrealm
'use strict';
test(() => {
new ReadableStream({}, new CountQueuingStrategy({ highWaterMark: 4 }));
}, 'Can construct a readable stream with a valid CountQueuingStrategy');
promise_test(() => {
let controller;
const rs = new ReadableStream(
{
start(c) {
controller = c;
}
},
new CountQueuingStrategy({ highWaterMark: 0 })
);
const reader = rs.getReader();
assert_equals(controller.desiredSize, 0, '0 reads, 0 enqueues: desiredSize should be 0');
controller.enqueue('a');
assert_equals(controller.desiredSize, -1, '0 reads, 1 enqueue: desiredSize should be -1');
controller.enqueue('b');
assert_equals(controller.desiredSize, -2, '0 reads, 2 enqueues: desiredSize should be -2');
controller.enqueue('c');
assert_equals(controller.desiredSize, -3, '0 reads, 3 enqueues: desiredSize should be -3');
controller.enqueue('d');
assert_equals(controller.desiredSize, -4, '0 reads, 4 enqueues: desiredSize should be -4');
return reader.read()
.then(result => {
assert_object_equals(result, { value: 'a', done: false },
'1st read gives back the 1st chunk enqueued (queue now contains 3 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'b', done: false },
'2nd read gives back the 2nd chunk enqueued (queue now contains 2 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'c', done: false },
'3rd read gives back the 3rd chunk enqueued (queue now contains 1 chunk)');
assert_equals(controller.desiredSize, -1, '3 reads, 4 enqueues: desiredSize should be -1');
controller.enqueue('e');
assert_equals(controller.desiredSize, -2, '3 reads, 5 enqueues: desiredSize should be -2');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'd', done: false },
'4th read gives back the 4th chunk enqueued (queue now contains 1 chunks)');
return reader.read();
}).then(result => {
assert_object_equals(result, { value: 'e', done: false },
'5th read gives back the 5th chunk enqueued (queue now contains 0 chunks)');
assert_equals(controller.desiredSize, 0, '5 reads, 5 enqueues: desiredSize should be 0');
controller.enqueue('f');
assert_equals(controller.desiredSize, -1, '5 reads, 6 enqueues: desiredSize should be -1');
controller.enqueue('g');
assert_equals(controller.desiredSize, -2, '5 reads, 7 enqueues: desiredSize should be -2');
});
}, 'Correctly governs a ReadableStreamController\'s desiredSize property (HWM = 0)');
promise_test(() => {
let controller;
const rs = new ReadableStream(
{
start(c) {
controller = c;
}
},
new CountQueuingStrategy({ highWaterMark: 1 })
);
const reader = rs.getReader();
assert_equals(controller.desiredSize, 1, '0 reads, 0 enqueues: desiredSize should be 1');
controller.enqueue('a');
assert_equals(controller.desiredSize, 0, '0 reads, 1 enqueue: desiredSize should be 0');
controller.enqueue('b');
assert_equals(controller.desiredSize, -1, '0 reads, 2 enqueues: desiredSize should be -1');
controller.enqueue('c');
assert_equals(controller.desiredSize, -2, '0 reads, 3 enqueues: desiredSize should be -2');
controller.enqueue('d');
assert_equals(controller.desiredSize, -3, '0 reads, 4 enqueues: desiredSize should be -3');
return reader.read()
.then(result => {
assert_object_equals(result, { value: 'a', done: false },
'1st read gives back the 1st chunk enqueued (queue now contains 3 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'b', done: false },
'2nd read gives back the 2nd chunk enqueued (queue now contains 2 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'c', done: false },
'3rd read gives back the 3rd chunk enqueued (queue now contains 1 chunk)');
assert_equals(controller.desiredSize, 0, '3 reads, 4 enqueues: desiredSize should be 0');
controller.enqueue('e');
assert_equals(controller.desiredSize, -1, '3 reads, 5 enqueues: desiredSize should be -1');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'd', done: false },
'4th read gives back the 4th chunk enqueued (queue now contains 1 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'e', done: false },
'5th read gives back the 5th chunk enqueued (queue now contains 0 chunks)');
assert_equals(controller.desiredSize, 1, '5 reads, 5 enqueues: desiredSize should be 1');
controller.enqueue('f');
assert_equals(controller.desiredSize, 0, '5 reads, 6 enqueues: desiredSize should be 0');
controller.enqueue('g');
assert_equals(controller.desiredSize, -1, '5 reads, 7 enqueues: desiredSize should be -1');
});
}, 'Correctly governs a ReadableStreamController\'s desiredSize property (HWM = 1)');
promise_test(() => {
let controller;
const rs = new ReadableStream(
{
start(c) {
controller = c;
}
},
new CountQueuingStrategy({ highWaterMark: 4 })
);
const reader = rs.getReader();
assert_equals(controller.desiredSize, 4, '0 reads, 0 enqueues: desiredSize should be 4');
controller.enqueue('a');
assert_equals(controller.desiredSize, 3, '0 reads, 1 enqueue: desiredSize should be 3');
controller.enqueue('b');
assert_equals(controller.desiredSize, 2, '0 reads, 2 enqueues: desiredSize should be 2');
controller.enqueue('c');
assert_equals(controller.desiredSize, 1, '0 reads, 3 enqueues: desiredSize should be 1');
controller.enqueue('d');
assert_equals(controller.desiredSize, 0, '0 reads, 4 enqueues: desiredSize should be 0');
controller.enqueue('e');
assert_equals(controller.desiredSize, -1, '0 reads, 5 enqueues: desiredSize should be -1');
controller.enqueue('f');
assert_equals(controller.desiredSize, -2, '0 reads, 6 enqueues: desiredSize should be -2');
return reader.read()
.then(result => {
assert_object_equals(result, { value: 'a', done: false },
'1st read gives back the 1st chunk enqueued (queue now contains 5 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'b', done: false },
'2nd read gives back the 2nd chunk enqueued (queue now contains 4 chunks)');
assert_equals(controller.desiredSize, 0, '2 reads, 6 enqueues: desiredSize should be 0');
controller.enqueue('g');
assert_equals(controller.desiredSize, -1, '2 reads, 7 enqueues: desiredSize should be -1');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'c', done: false },
'3rd read gives back the 3rd chunk enqueued (queue now contains 4 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'd', done: false },
'4th read gives back the 4th chunk enqueued (queue now contains 3 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'e', done: false },
'5th read gives back the 5th chunk enqueued (queue now contains 2 chunks)');
return reader.read();
})
.then(result => {
assert_object_equals(result, { value: 'f', done: false },
'6th read gives back the 6th chunk enqueued (queue now contains 0 chunks)');
assert_equals(controller.desiredSize, 3, '6 reads, 7 enqueues: desiredSize should be 3');
controller.enqueue('h');
assert_equals(controller.desiredSize, 2, '6 reads, 8 enqueues: desiredSize should be 2');
controller.enqueue('i');
assert_equals(controller.desiredSize, 1, '6 reads, 9 enqueues: desiredSize should be 1');
controller.enqueue('j');
assert_equals(controller.desiredSize, 0, '6 reads, 10 enqueues: desiredSize should be 0');
controller.enqueue('k');
assert_equals(controller.desiredSize, -1, '6 reads, 11 enqueues: desiredSize should be -1');
});
}, 'Correctly governs a ReadableStreamController\'s desiredSize property (HWM = 4)');