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| 1 <!DOCTYPE html> |
| 2 <title>Custom Elements: report the exception</title> |
| 3 <script src="../../resources/testharness.js"></script> |
| 4 <script src="../../resources/testharnessreport.js"></script> |
| 5 <script src="resources/custom-elements-helpers.js"></script> |
| 6 <body> |
| 7 <!-- |
| 8 The spec has two places where it says to [report the exception]: |
| 9 |
| 10 1. In [create an element for a token], step 7. |
| 11 This can occur only when [create an element] is invoked from |
| 12 [create an element for a token] with the synchronous custom elements flag |
| 13 set. The document parser uses this algorithm. |
| 14 2. In [invoke custom element reactions], step 2.1. |
| 15 |
| 16 There are different code paths when: |
| 17 1. Author script throws an exception that is rethrown. |
| 18 2. The user agent throws an exception. |
| 19 |
| 20 This test contains 4 tests for the combination of the above 2x2. |
| 21 |
| 22 [create an element]: https://dom.spec.whatwg.org/#concept-create-element |
| 23 [create an element for a token]: https://html.spec.whatwg.org/multipage/syntax.h
tml#create-an-element-for-the-token |
| 24 [invoke custom element reactions]: https://html.spec.whatwg.org/multipage/script
ing.html#invoke-custom-element-reactions |
| 25 [report the exception]: https://html.spec.whatwg.org/multipage/webappapis.html#r
eport-the-exception |
| 26 --> |
| 27 <template id="constructor-throws"> |
| 28 <script> |
| 29 'use strict'; |
| 30 window.errors = []; |
| 31 // https://html.spec.whatwg.org/multipage/webappapis.html#event-handler-attribut
es:handler-onerror |
| 32 window.onerror = function (event, source, lineno, colno, error) { |
| 33 errors.push({ |
| 34 event: event, |
| 35 source: source, |
| 36 lineno: lineno, |
| 37 colno: colno, |
| 38 error: error |
| 39 }); |
| 40 return true; // Cancel the error event. |
| 41 }; |
| 42 |
| 43 const rethrowErrorName = 'rethrown'; |
| 44 const rethrowErrorMessage = 'check this is rethrown'; |
| 45 |
| 46 customElements.define('a-a', class extends HTMLElement { |
| 47 constructor() { |
| 48 const error = new Error(rethrowErrorMessage); |
| 49 error.name = rethrowErrorName; |
| 50 throw error; |
| 51 } |
| 52 }); |
| 53 </script> |
| 54 </template> |
| 55 <template id="instantiate"> |
| 56 <a-a></a-a> |
| 57 </template> |
| 58 <script> |
| 59 'use strict'; |
| 60 const rethrowErrorName = 'rethrown'; |
| 61 const rethrowErrorMessage = 'check this is rethrown'; |
| 62 |
| 63 function assert_not_muted_error_event(error) { |
| 64 assert_not_equals(error, undefined, 'should fire error event'); |
| 65 // Report an error, 6. If script has muted errors, ... |
| 66 // https://html.spec.whatwg.org/multipage/webappapis.html#report-the-error |
| 67 assert_false(error.event === 'Script error.' |
| 68 && error.source === '' && error.lineno === 0 && error.colno === 0 |
| 69 && error.error === null, |
| 70 'the error should not be muted.'); |
| 71 assert_false(!error.event, 'event (1st arg) should not be null'); |
| 72 assert_false(!error.source, 'source (2nd arg) should not be null'); |
| 73 // The spec doesn't define valid values for lineno/colno. |
| 74 assert_false(!error.error, 'error (5th arg) should not be null'); |
| 75 } |
| 76 |
| 77 function assert_rethrown_error_event(error) { |
| 78 assert_not_muted_error_event(error); |
| 79 assert_equals(error.error.name, rethrowErrorName); |
| 80 assert_equals(error.error.message, rethrowErrorMessage); |
| 81 } |
| 82 |
| 83 const constructor_throws = |
| 84 document.getElementById('constructor-throws').innerHTML; |
| 85 const instantiate = document.getElementById('instantiate').innerHTML; |
| 86 |
| 87 test_with_window((w) => { |
| 88 assert_rethrown_error_event(w.errors[0]); |
| 89 }, 'Document parser invokes the constructor that throws', |
| 90 constructor_throws + instantiate); |
| 91 |
| 92 test_with_window((w) => { |
| 93 w.document.body.innerHTML = instantiate; |
| 94 assert_rethrown_error_event(w.errors[0]); |
| 95 }, 'Upgrade reaction invokes the constructor that throws', |
| 96 constructor_throws); |
| 97 </script> |
| 98 |
| 99 <!-- |
| 100 Test when JavaScript returns without throwing errors, but the result is invalid |
| 101 and thus UA should [report the exception]. |
| 102 --> |
| 103 <template id="constructor-returns-bad-object"> |
| 104 <script> |
| 105 'use strict'; |
| 106 window.errors = []; |
| 107 // https://html.spec.whatwg.org/multipage/webappapis.html#event-handler-attribut
es:handler-onerror |
| 108 window.onerror = function (event, source, lineno, colno, error) { |
| 109 errors.push({ |
| 110 event: event, |
| 111 source: source, |
| 112 lineno: lineno, |
| 113 colno: colno, |
| 114 error: error |
| 115 }); |
| 116 return true; // Cancel the error event. |
| 117 }; |
| 118 |
| 119 customElements.define('a-a', class extends HTMLElement { |
| 120 constructor() { |
| 121 super(); |
| 122 return []; // returning objects other than "this" is invalid. |
| 123 } |
| 124 }); |
| 125 </script> |
| 126 </template> |
| 127 <script> |
| 128 const constructor_returns_bad_object = |
| 129 document.getElementById('constructor-returns-bad-object').innerHTML; |
| 130 |
| 131 function assert_type_error_event(error) { |
| 132 assert_not_muted_error_event(error); |
| 133 assert_equals(error.error.name, 'TypeError'); |
| 134 } |
| 135 |
| 136 function assert_invalid_state_dom_error_event(error) { |
| 137 assert_not_muted_error_event(error); |
| 138 assert_equals(error.error.name, 'InvalidStateError'); |
| 139 } |
| 140 |
| 141 test_with_window((w) => { |
| 142 // "create an element" 6.1.3, throw a TypeError. |
| 143 // https://dom.spec.whatwg.org/#concept-create-element |
| 144 assert_type_error_event(w.errors[0]); |
| 145 }, 'Document parser invokes the constructor that returns a bad object', |
| 146 constructor_returns_bad_object + instantiate); |
| 147 |
| 148 test_with_window((w) => { |
| 149 // "upgrade an element" 10, throw an InvalidStateError DOMException. |
| 150 // https://html.spec.whatwg.org/multipage/scripting.html#upgrades |
| 151 w.document.body.innerHTML = instantiate; |
| 152 assert_invalid_state_dom_error_event(w.errors[0]); |
| 153 }, 'Upgrade reaction invokes the constructor that returns a bad object', |
| 154 constructor_returns_bad_object); |
| 155 </script> |
| 156 </body> |
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Chromium Code Reviews
Issue 2244203002:
Fix "report the exception" in Custom Elements V1 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master