49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
// META: global=window,worker,shadowrealm
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'use strict';
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const transformerMethods = {
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start: {
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length: 1,
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trigger: () => Promise.resolve()
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},
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transform: {
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length: 2,
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trigger: ts => ts.writable.getWriter().write()
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},
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flush: {
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length: 1,
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trigger: ts => ts.writable.getWriter().close()
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}
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};
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for (const method in transformerMethods) {
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const { length, trigger } = transformerMethods[method];
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// Some semantic tests of how transformer methods are called can be found in general.js, as well as in the test files
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// specific to each method.
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promise_test(() => {
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let argCount;
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const ts = new TransformStream({
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[method](...args) {
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argCount = args.length;
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}
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}, undefined, { highWaterMark: Infinity });
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return Promise.resolve(trigger(ts)).then(() => {
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assert_equals(argCount, length, `${method} should be called with ${length} arguments`);
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});
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}, `transformer method ${method} should be called with the right number of arguments`);
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promise_test(() => {
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let methodWasCalled = false;
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function Transformer() {}
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Transformer.prototype = {
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[method]() {
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methodWasCalled = true;
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}
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};
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const ts = new TransformStream(new Transformer(), undefined, { highWaterMark: Infinity });
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return Promise.resolve(trigger(ts)).then(() => {
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assert_true(methodWasCalled, `${method} should be called`);
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});
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}, `transformer method ${method} should be called even when it's located on the prototype chain`);
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}
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