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// META: global=worker
'use strict';
// Verify that constructor arguments are correctly reflected in the attributes.
// Mapping of the first argument to TextDecoderStream to the expected value of
// the encoding attribute. We assume that if this subset works correctly, the
// rest probably work too.
const labelToName = {
'unicode-1-1-utf-8': 'utf-8',
'iso-8859-2': 'iso-8859-2',
'ascii': 'windows-1252',
'utf-16': 'utf-16le'
};
for (const label of Object.keys(labelToName)) {
test(() => {
const stream = new TextDecoderStream(label);
assert_equals(stream.encoding, labelToName[label], 'encoding should match');
}, `encoding attribute should have correct value for '${label}'`);
}
for (const falseValue of [false, 0, '', undefined, null]) {
test(() => {
const stream = new TextDecoderStream('utf-8', { fatal: falseValue });
assert_false(stream.fatal, 'fatal should be false');
}, `setting fatal to '${falseValue}' should set the attribute to false`);
test(() => {
const stream = new TextDecoderStream('utf-8', { ignoreBOM: falseValue });
assert_false(stream.ignoreBOM, 'ignoreBOM should be false');
}, `setting ignoreBOM to '${falseValue}' should set the attribute to false`);
}
for (const trueValue of [true, 1, {}, [], 'yes']) {
test(() => {
const stream = new TextDecoderStream('utf-8', { fatal: trueValue });
assert_true(stream.fatal, 'fatal should be true');
}, `setting fatal to '${trueValue}' should set the attribute to true`);
test(() => {
const stream = new TextDecoderStream('utf-8', { ignoreBOM: trueValue });
assert_true(stream.ignoreBOM, 'ignoreBOM should be true');
}, `setting ignoreBOM to '${trueValue}' should set the attribute to true`);
}
test(() => {
assert_throws(new RangeError(), () => new TextDecoderStream(''),
'the constructor should throw');
}, 'constructing with an invalid encoding should throw');
test(() => {
assert_throws(new TypeError(), () => new TextDecoderStream({
toString() { return {}; }
}), 'the constructor should throw');
}, 'constructing with a non-stringifiable encoding should throw');
test(() => {
assert_throws(new Error(),
() => new TextDecoderStream('utf-8', {
get fatal() { throw new Error(); }
}), 'the constructor should throw');
}, 'a throwing fatal member should cause the constructor to throw');
test(() => {
assert_throws(new Error(),
() => new TextDecoderStream('utf-8', {
get ignoreBOM() { throw new Error(); }
}), 'the constructor should throw');
}, 'a throwing ignoreBOM member should cause the constructor to throw');