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28 lines
1.1 KiB
HTML
28 lines
1.1 KiB
HTML
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<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Test for promise resolution ordering with thenables and promises</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="log"></div>
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<script>
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var t = async_test("A promise resolved first (with a thenable) should trigger its callbacks before a promise resolved second (with a promise).");
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t.step(function() {
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var customThenCalled = false;
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var p0 = Promise.resolve();
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p0.then = function(resolved, rejected) {
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customThenCalled = true;
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Promise.prototype.then.call(this, resolved, rejected);
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}
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var p1 = new Promise(function(r) { r(p0); });
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delete p0.then;
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var p2 = new Promise(function(r) { r(p0); });
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var resolutionOrder = "";
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Promise.all([ p1.then(function() { resolutionOrder += "1"; }),
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p2.then(function() { resolutionOrder += "2"; }) ])
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.then(t.step_func_done(function() {
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assert_true(customThenCalled, "Should have called custom then");
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assert_equals(resolutionOrder, "12");
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}));
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});
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</script>
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