1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
<!DOCTYPE html>
<title>Custom Elements: Element definition</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<div id="log"></div>
<iframe id="iframe"></iframe>
<script>
'use strict';
(() => {
// Element definition
// https://html.spec.whatwg.org/multipage/scripting.html#element-definition
// Use window from iframe to isolate the test.
const iframe = document.getElementById("iframe");
const testWindow = iframe.contentDocument.defaultView;
const customElements = testWindow.customElements;
let testable = false;
test(() => {
assert_true('customElements' in testWindow, '"window.customElements" exists');
assert_true('define' in customElements, '"window.customElements.define" exists');
testable = true;
}, '"window.customElements.define" should exists');
if (!testable)
return;
const expectTypeError = testWindow.TypeError;
// Following errors are DOMException, not JavaScript errors.
const expectSyntaxError = 'SYNTAX_ERR';
const expectNotSupportedError = 'NOT_SUPPORTED_ERR';
// 1. If IsConstructor(constructor) is false,
// then throw a TypeError and abort these steps.
test(() => {
assert_throws_js(expectTypeError, () => {
customElements.define();
});
}, 'If no arguments, should throw a TypeError');
test(() => {
assert_throws_js(expectTypeError, () => {
customElements.define('test-define-one-arg');
});
}, 'If one argument, should throw a TypeError');
[
[ 'undefined', undefined ],
[ 'null', null ],
[ 'object', {} ],
[ 'string', 'string' ],
[ 'arrow function', () => {} ], // IsConstructor returns false for arrow functions
[ 'method', ({ m() { } }).m ], // IsConstructor returns false for methods
].forEach(t => {
test(() => {
assert_throws_js(expectTypeError, () => {
customElements.define(`test-define-constructor-${t[0]}`, t[1]);
});
}, `If constructor is ${t[0]}, should throw a TypeError`);
});
// 2. If name is not a valid custom element name,
// then throw a SyntaxError and abort these steps.
let validCustomElementNames = [
// [a-z] (PCENChar)* '-' (PCENChar)*
// https://html.spec.whatwg.org/multipage/scripting.html#valid-custom-element-name
'a-',
'a-a',
'aa-',
'aa-a',
'a-.-_',
'a-0123456789',
'a-\u6F22\u5B57', // Two CJK Unified Ideographs
'a-\uD840\uDC0B', // Surrogate pair U+2000B
];
let invalidCustomElementNames = [
undefined,
null,
'',
'-',
'a',
'input',
'mycustomelement',
'A',
'A-',
'0-',
'a-A',
'a-Z',
'A-a',
'a-a\u00D7',
'a-a\u3000',
'a-a\uDB80\uDC00', // Surrogate pair U+F0000
// name must not be any of the hyphen-containing element names.
'annotation-xml',
'color-profile',
'font-face',
'font-face-src',
'font-face-uri',
'font-face-format',
'font-face-name',
'missing-glyph',
];
validCustomElementNames.forEach(name => {
test(() => {
customElements.define(name, class {});
}, `Element names: defining an element named ${name} should succeed`);
});
invalidCustomElementNames.forEach(name => {
test(() => {
assert_throws_dom(expectSyntaxError, testWindow.DOMException, () => {
customElements.define(name, class {});
});
}, `Element names: defining an element named ${name} should throw a SyntaxError`);
});
// 3. If this CustomElementRegistry contains an entry with name name,
// then throw a NotSupportedError and abort these steps.
test(() => {
customElements.define('test-define-dup-name', class {});
assert_throws_dom(expectNotSupportedError, testWindow.DOMException, () => {
customElements.define('test-define-dup-name', class {});
});
}, 'If the name is already defined, should throw a NotSupportedError');
// 5. If this CustomElementRegistry contains an entry with constructor constructor,
// then throw a NotSupportedError and abort these steps.
test(() => {
class TestDupConstructor {};
customElements.define('test-define-dup-constructor', TestDupConstructor);
assert_throws_dom(expectNotSupportedError, testWindow.DOMException, () => {
customElements.define('test-define-dup-ctor2', TestDupConstructor);
});
}, 'If the constructor is already defined, should throw a NotSupportedError');
// 12.1. Let prototype be Get(constructor, "prototype"). Rethrow any exceptions.
const err = new Error('check this is rethrown');
err.name = 'rethrown';
function assert_rethrown(func, description) {
assert_throws_exactly(err, func, description);
}
function throw_rethrown_error() {
throw err;
}
test(() => {
// Hack for prototype to throw while IsConstructor is true.
const BadConstructor = (function () { }).bind({});
Object.defineProperty(BadConstructor, 'prototype', {
get() { throw_rethrown_error(); }
});
assert_rethrown(() => {
customElements.define('test-define-constructor-prototype-rethrow', BadConstructor);
});
}, 'If constructor.prototype throws, should rethrow');
// 12.2. If Type(prototype) is not Object,
// then throw a TypeError exception.
test(() => {
const c = (function () { }).bind({}); // prototype is undefined.
assert_throws_js(expectTypeError, () => {
customElements.define('test-define-constructor-prototype-undefined', c);
});
}, 'If Type(constructor.prototype) is undefined, should throw a TypeError');
test(() => {
function c() {};
c.prototype = 'string';
assert_throws_js(expectTypeError, () => {
customElements.define('test-define-constructor-prototype-string', c);
});
}, 'If Type(constructor.prototype) is string, should throw a TypeError');
// 12.3. Let lifecycleCallbacks be a map with the four keys "connectedCallback",
// "disconnectedCallback", "adoptedCallback", and "attributeChangedCallback",
// each of which belongs to an entry whose value is null.
// 12.4. For each of the four keys callbackName in lifecycleCallbacks:
// 12.4.1. Let callbackValue be Get(prototype, callbackName). Rethrow any exceptions.
// 12.4.2. If callbackValue is not undefined, then set the value of the entry in
// lifecycleCallbacks with key callbackName to the result of converting callbackValue
// to the Web IDL Function callback type. Rethrow any exceptions from the conversion.
[
'connectedCallback',
'disconnectedCallback',
'adoptedCallback',
'attributeChangedCallback',
].forEach(name => {
test(() => {
class C {
get [name]() { throw_rethrown_error(); }
}
assert_rethrown(() => {
customElements.define(`test-define-${name.toLowerCase()}-rethrow`, C);
});
}, `If constructor.prototype.${name} throws, should rethrow`);
[
{ name: 'undefined', value: undefined, success: true },
{ name: 'function', value: function () { }, success: true },
{ name: 'null', value: null, success: false },
{ name: 'object', value: {}, success: false },
{ name: 'integer', value: 1, success: false },
].forEach(data => {
test(() => {
class C { };
C.prototype[name] = data.value;
if (data.success) {
customElements.define(`test-define-${name.toLowerCase()}-${data.name}`, C);
} else {
assert_throws_js(expectTypeError, () => {
customElements.define(`test-define-${name.toLowerCase()}-${data.name}`, C);
});
}
}, `If constructor.prototype.${name} is ${data.name}, should ${data.success ? 'succeed' : 'throw a TypeError'}`);
});
});
})();
</script>
</body>
|
