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
|
import { createElement, render, toChildArray } from 'preact';
import {
setupScratch,
teardown,
getMixedArray,
mixedArrayHTML
} from '../_util/helpers';
/** @jsx createElement */
describe('toChildArray', () => {
/** @type {HTMLDivElement} */
let scratch;
let children;
let Foo = props => {
children = toChildArray(props.children);
return <div>{children}</div>;
};
let Bar = () => <span>Bar</span>;
beforeEach(() => {
scratch = setupScratch();
children = undefined;
});
afterEach(() => {
teardown(scratch);
});
it('returns an empty array with no child', () => {
render(<Foo />, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(0);
expect(scratch.innerHTML).to.equal('<div></div>');
});
it('returns an empty array with null as a child', () => {
render(<Foo>{null}</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(0);
expect(scratch.innerHTML).to.equal('<div></div>');
});
it('returns an empty array with false as a child', () => {
render(<Foo>{false}</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(0);
expect(scratch.innerHTML).to.equal('<div></div>');
});
it('returns an empty array with true as a child', () => {
render(<Foo>{true}</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(0);
expect(scratch.innerHTML).to.equal('<div></div>');
});
it('should skip a function child', () => {
const child = num => num.toFixed(2);
render(<Foo>{child}</Foo>, scratch);
expect(children).to.be.an('array');
expect(scratch.innerHTML).to.equal('<div></div>');
});
it('returns an array containing a VNode with a text child', () => {
render(<Foo>text</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(1);
expect(children[0]).to.equal('text');
expect(scratch.innerHTML).to.equal('<div>text</div>');
});
it('returns an array containing a VNode with a number child', () => {
render(<Foo>{1}</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(1);
expect(children[0]).to.equal(1);
expect(scratch.innerHTML).to.equal('<div>1</div>');
});
it('returns an array containing a VNode with a DOM node child', () => {
render(
<Foo>
<span />
</Foo>,
scratch
);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(1);
expect(children[0].type).to.equal('span');
expect(scratch.innerHTML).to.equal('<div><span></span></div>');
});
it('returns an array containing a VNode with a Component child', () => {
render(
<Foo>
<Bar />
</Foo>,
scratch
);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(1);
expect(children[0].type).to.equal(Bar);
expect(scratch.innerHTML).to.equal('<div><span>Bar</span></div>');
});
it('returns an array with multiple children', () => {
render(
<Foo>
0<span />
<input />
<div />1
</Foo>,
scratch
);
expect(children).to.be.an('array');
expect(children[0]).to.equal('0');
expect(children[1].type).to.equal('span');
expect(children[2].type).to.equal('input');
expect(children[3].type).to.equal('div');
expect(children[4]).to.equal('1');
expect(scratch.innerHTML).to.equal(
`<div>0<span></span><input><div></div>1</div>`
);
});
it('returns an array with non-renderables removed with a mixed array as children', () => {
const mixedArray = getMixedArray();
render(<Foo>{mixedArray}</Foo>, scratch);
expect(children).to.be.an('array');
expect(children).to.have.lengthOf(8); // Length of flattened mixedArray with non-renderables removed
expect(scratch.innerHTML).to.equal(`<div>${mixedArrayHTML}</div>`);
function filterAndReduceChildren(acc, child) {
if (Array.isArray(child)) {
return child.reduce(filterAndReduceChildren, acc);
}
if (
child != null &&
typeof child != 'boolean' &&
typeof child != 'function'
) {
acc.push(child);
}
return acc;
}
let renderableArray = filterAndReduceChildren([], mixedArray);
expect(children).to.have.lengthOf(renderableArray.length);
for (let i = 0; i < renderableArray.length; i++) {
let originalChild = renderableArray[i];
let actualChild = children[i];
if (
typeof originalChild == 'string' ||
typeof originalChild == 'number'
) {
expect(actualChild).to.equal(originalChild);
} else {
expect(actualChild.type).to.equal(originalChild.type);
}
}
});
it('flattens sibling and nested arrays', () => {
const list1 = [0, 1];
const list2 = [2, 3];
const list3 = [4, 5];
const list4 = [6, 7];
const list5 = [8, 9];
const flatList = [...list1, ...list2, ...list3, ...list4, ...list5];
render(
<Foo>
{[list1, list2]}
{[list3, list4]}
{list5}
</Foo>,
scratch
);
expect(children).to.be.an('array');
expect(scratch.innerHTML).to.equal('<div>0123456789</div>');
for (let i = 0; i < flatList.length; i++) {
expect(children[i]).to.equal(flatList[i]);
}
});
});
|
