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'use strict';
if (self.importScripts) {
self.importScripts('/resources/testharness.js');
}
test(() => {
const theError = new Error('a unique string');
assert_throws(theError, () => {
new ReadableStream({}, {
get size() {
throw theError;
},
highWaterMark: 5
});
}, 'construction should re-throw the error');
}, 'Readable stream: throwing strategy.size getter');
promise_test(t => {
const controllerError = { name: 'controller error' };
const thrownError = { name: 'thrown error' };
let controller;
const rs = new ReadableStream(
{
start(c) {
controller = c;
}
},
{
size() {
controller.error(controllerError);
throw thrownError;
},
highWaterMark: 5
}
);
assert_throws(thrownError, () => controller.enqueue('a'), 'enqueue should re-throw the error');
return promise_rejects(t, controllerError, rs.getReader().closed);
}, 'Readable stream: strategy.size errors the stream and then throws');
promise_test(t => {
const theError = { name: 'my error' };
let controller;
const rs = new ReadableStream(
{
start(c) {
controller = c;
}
},
{
size() {
controller.error(theError);
return Infinity;
},
highWaterMark: 5
}
);
assert_throws(new RangeError(), () => controller.enqueue('a'), 'enqueue should throw a RangeError');
return promise_rejects(t, theError, rs.getReader().closed, 'closed should reject with the error');
}, 'Readable stream: strategy.size errors the stream and then returns Infinity');
promise_test(() => {
const theError = new Error('a unique string');
const rs = new ReadableStream(
{
start(c) {
assert_throws(theError, () => c.enqueue('a'), 'enqueue should throw the error');
}
},
{
size() {
throw theError;
},
highWaterMark: 5
}
);
return rs.getReader().closed.catch(e => {
assert_equals(e, theError, 'closed should reject with the error');
});
}, 'Readable stream: throwing strategy.size method');
test(() => {
const theError = new Error('a unique string');
assert_throws(theError, () => {
new ReadableStream({}, {
size() {
return 1;
},
get highWaterMark() {
throw theError;
}
});
}, 'construction should re-throw the error');
}, 'Readable stream: throwing strategy.highWaterMark getter');
test(() => {
for (const highWaterMark of [-1, -Infinity, NaN, 'foo', {}]) {
assert_throws(new RangeError(), () => {
new ReadableStream({}, {
size() {
return 1;
},
highWaterMark
});
}, 'construction should throw a RangeError for ' + highWaterMark);
}
}, 'Readable stream: invalid strategy.highWaterMark');
promise_test(() => {
const promises = [];
for (const size of [NaN, -Infinity, Infinity, -1]) {
let theError;
const rs = new ReadableStream(
{
start(c) {
try {
c.enqueue('hi');
assert_unreached('enqueue didn\'t throw');
} catch (error) {
assert_equals(error.name, 'RangeError', 'enqueue should throw a RangeError for ' + size);
theError = error;
}
}
},
{
size() {
return size;
},
highWaterMark: 5
}
);
promises.push(rs.getReader().closed.catch(e => {
assert_equals(e, theError, 'closed should reject with the error for ' + size);
}));
}
return Promise.all(promises);
}, 'Readable stream: invalid strategy.size return value');
done();
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