README
snabbdom-looks-like
Makes it easy to assert if to virtual DOM trees look similar
Usage
import { assertLooksLike, Wildcard } from 'snabbdom-looks-like';
import { h } from 'snabbdom/h';
import { div, span } from '@cycle/dom'; // or other hyperscript helpers
import Snabbdom from 'snabbdom-pragma'; // for JSX
import * as assert from 'assert';
it('simple Test', () => {
const expected = div([
span('hello')
]);
const actual = h('div', {}, [
h('span', {}. 'hello')
]);
assertLooksLike(actual, expected);
});
it('supports wildcards', () => {
const expected = div([
Wildcard(),
span('', {}, 'hello'),
Wildcard(),
div('.red')
]);
const matches = h('div', {}, [
h('span', {}, 'hello'),
h('span', {}, 'this gets matched to the wildcard!!!!'),
h('span', {}, 'this too!!!!'),
h('div.red')
]);
const doesNotMatch = const matches = h('div', {}, [
h('span', {}, 'hello'),
h('span', {}, 'this gets matched to the wildcard!!!!'),
h('span', {}, 'this too!!!!'),
h('div.blue')
]);
assertLooksLike(matches, expected);
assert.throws(() => assertLooksLike(doesNotMatch, expected));
});
it('also works with JSX', () => {
const expected = <div>
<Wildcard />,
<span>hello</span>,
<Wildcard />,
</div>;
const actualHyperscript = h('div', {}, [
h('span', {}, 'hello'),
h('span', {}, 'this gets matched to the wildcard!!!!'),
h('span', {}, 'this too!!!!')
]);
const actualJSX = <div>
<span>hello</span>
<span>this gets matched to the wildcard!!!!</span>
<span>this too!!!!</span>
</div>;
assertLooksLike(actualHyperscript, expected);
assertLooksLike(actualJSX, expected);
});
it('can expect attributes', () => {
const expected = <div>
<span className="test">Test</span>
</div>;
const actual = h('div', {}, [
h('span', { props: { className: 'test' }}, 'Test')
]);
assertLooksLike(actual, expected);
});