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Diffstat (limited to 'dom/promise/tests/test_thenable_vs_promise_ordering.html')
| -rw-r--r-- | dom/promise/tests/test_thenable_vs_promise_ordering.html | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/dom/promise/tests/test_thenable_vs_promise_ordering.html b/dom/promise/tests/test_thenable_vs_promise_ordering.html new file mode 100644 index 000000000..161e95d75 --- /dev/null +++ b/dom/promise/tests/test_thenable_vs_promise_ordering.html @@ -0,0 +1,27 @@ +<!DOCTYPE html> +<meta charset=utf-8> +<title>Test for promise resolution ordering with thenables and promises</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<div id="log"></div> +<script> +var t = async_test("A promise resolved first (with a thenable) should trigger its callbacks before a promise resolved second (with a promise)."); +t.step(function() { + var customThenCalled = false; + var p0 = Promise.resolve(); + p0.then = function(resolved, rejected) { + customThenCalled = true; + Promise.prototype.then.call(this, resolved, rejected); + } + var p1 = new Promise(function(r) { r(p0); }); + delete p0.then; + var p2 = new Promise(function(r) { r(p0); }); + var resolutionOrder = ""; + Promise.all([ p1.then(function() { resolutionOrder += "1"; }), + p2.then(function() { resolutionOrder += "2"; }) ]) + .then(t.step_func_done(function() { + assert_true(customThenCalled, "Should have called custom then"); + assert_equals(resolutionOrder, "12"); + })); +}); +</script> |