purchase-let/node_modules/delegate/test/closest.js

46 lines
1.3 KiB
JavaScript

var closest = require('../src/closest');
describe('closest', function() {
before(function() {
var html = '<div id="a">' +
'<div id="b">' +
'<div id="c"></div>' +
'</div>' +
'</div>';
document.body.innerHTML += html;
global.a = document.querySelector('#a');
global.b = document.querySelector('#b');
global.c = document.querySelector('#c');
});
after(function() {
document.body.innerHTML = '';
});
it('should return the closest parent based on the selector', function() {
assert.ok(closest(global.c, '#b'), global.b);
assert.ok(closest(global.c, '#a'), global.a);
assert.ok(closest(global.b, '#a'), global.a);
});
it('should return itself if the same selector is passed', function() {
assert.ok(closest(document.body, 'body'), document.body);
});
it('should not throw on elements without matches()', function() {
var fakeElement = {
nodeType: -1, // anything but DOCUMENT_NODE_TYPE
parentNode: null,
matches: undefined // undefined to emulate Elements without this function
};
try {
closest(fakeElement, '#a')
} catch (err) {
assert.fail();
}
});
});