angular-cn/packages/elements/test/extract-projectable-nodes_s...

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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {extractProjectableNodes} from '../src/extract-projectable-nodes';
describe('extractProjectableNodes()', () => {
let elem: HTMLElement;
let childNodes: ChildNode[];
const expectProjectableNodes = (matches: {[selector: string]: number[]}) => {
const selectors = Object.keys(matches);
const expected = selectors.map(selector => {
const matchingIndices = matches[selector];
return matchingIndices.map(idx => childNodes[idx]);
});
expect(extractProjectableNodes(elem, selectors)).toEqual(expected);
};
const test = (matches: {[selector: string]: number[]}) => () => expectProjectableNodes(matches);
beforeEach(() => {
elem = document.createElement('div');
elem.innerHTML = '<div class="foo" first="">' +
'<span class="bar"></span>' +
'</div>' +
'<span id="bar"></span>' +
'<!-- Comment -->' +
'Text' +
'<blink class="foo" id="quux"></blink>' +
'More text';
childNodes = Array.prototype.slice.call(elem.childNodes);
});
it('should match each node to the corresponding selector', test({
'[first]': [0],
'#bar': [1],
'#quux': [4],
}));
it('should ignore non-matching nodes', test({
'.zoo': [],
}));
it('should only match top-level child nodes', test({
'span': [1],
'.bar': [],
}));
it('should support complex selectors', test({
'.foo:not(div)': [4],
'div + #bar': [1],
}));
it('should match each node with the first matching selector', test({
'div': [0],
'.foo': [4],
'blink': [],
}));
describe('(with wildcard selector)', () => {
it('should match non-element nodes to `*` (but still ignore comments)', test({
'div,span,blink': [0, 1, 4],
'*': [2, 3, 5],
}));
it('should match otherwise unmatched nodes to `*`', test({
'div,blink': [0, 4],
'*': [1, 2, 3, 5],
}));
it('should give higher priority to `*` (eve if it appears first)', test({
'*': [2, 3, 5],
'div,span,blink': [0, 1, 4],
}));
});
});