| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <title>Promise Tests</title> |
| </head> |
| <body> |
| <h1>Promise Tests</h1> |
| <p>This test demonstrates the use of <tt>promise_test</tt>. Assumes ECMAScript 6 |
| Promise support. Some failures are expected.</p> |
| <div id="log"></div> |
| <script src="../testharness.js"></script> |
| <script src="../testharnessreport.js"></script> |
| <script> |
| test( |
| function() { |
| var p = new Promise(function(resolve, reject){}); |
| assert_true("then" in p); |
| assert_equals(typeof Promise.resolve, "function"); |
| assert_equals(typeof Promise.reject, "function"); |
| }, |
| "Promises are supported in your browser"); |
| |
| promise_test( |
| function() { |
| return Promise.resolve("x") |
| .then( |
| function(value) { |
| assert_equals(value, |
| "x", |
| "Fulfilled promise should pass result to " + |
| "fulfill reaction."); |
| }); |
| }, |
| "Promise fulfillment with result"); |
| |
| promise_test( |
| function(t) { |
| return Promise.reject(new Error("fail")) |
| .then(t.unreached_func("Promise should reject"), |
| function(reason) { |
| assert_true( |
| reason instanceof Error, |
| "Rejected promise should pass reason to fulfill reaction."); |
| assert_equals( |
| reason.message, |
| "fail", |
| "Rejected promise should pass reason to reject reaction."); |
| }); |
| }, |
| "Promise rejection with result"); |
| |
| promise_test( |
| function() { |
| var resolutions = []; |
| return Promise.resolve("a") |
| .then( |
| function(value) { |
| resolutions.push(value); |
| return "b"; |
| }) |
| .then( |
| function(value) { |
| resolutions.push(value); |
| return "c"; |
| }) |
| .then( |
| function(value) { |
| resolutions.push(value); |
| assert_array_equals(resolutions, ["a", "b", "c"]); |
| }); |
| }, |
| "Chain of promise resolutions"); |
| |
| promise_test( |
| function(t) { |
| var resolutions = []; |
| return Promise.resolve("x") |
| .then( |
| function(value) { |
| assert_true(false, "Expected failure."); |
| }) |
| .then(t.unreached_func("UNEXPECTED FAILURE: Promise should not have resolved.")); |
| }, |
| "Assertion failure in a fulfill reaction (should FAIL with an expected failure)"); |
| |
| promise_test( |
| function(t) { |
| return new Promise( |
| function(resolve, reject) { |
| reject(123); |
| }) |
| .then(t.unreached_func("UNEXPECTED FAILURE: Fulfill reaction reached after rejection."), |
| t.unreached_func("Expected failure.")); |
| }, |
| "unreached_func as reactor (should FAIL with an expected failure)"); |
| |
| promise_test( |
| function() { |
| return true; |
| }, |
| "promise_test with function that doesn't return a Promise"); |
| |
| promise_test(function(){}, |
| "promise_test with function that doesn't return anything"); |
| |
| promise_test( |
| function() { |
| return Promise.reject("Expected rejection"); |
| }, |
| "promise_test with unhandled rejection (should FAIL)"); |
| |
| promise_test( |
| function() { |
| return Promise.resolve(10) |
| .then( |
| function(value) { |
| throw Error("Expected exception."); |
| }); |
| }, |
| "promise_test with unhandled exception in fulfill reaction (should FAIL)"); |
| |
| promise_test( |
| function(t) { |
| return Promise.reject(10) |
| .then( |
| t.unreached_func("UNEXPECTED FAILURE: Fulfill reaction reached after rejection."), |
| function(value) { |
| throw Error("Expected exception."); |
| }); |
| }, |
| "promise_test with unhandled exception in reject reaction (should FAIL)"); |
| </script> |
