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non-existent-element.e2e.ts
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non-existent-element.e2e.ts
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import { newE2EPage } from '@stencil/core/testing';
describe('Querying non-existent element(s)', () => {
describe('Shadow DOM', () => {
it('returns `null` if the element does not exist', async () => {
// create a new puppeteer page
const page = await newE2EPage({
html: `
<empty-cmp-shadow></empty-cmp-shadow>
`,
});
const elm = await page.find('empty-cmp-shadow >>> .non-existent');
expect(elm).toBeNull();
});
it('returns an empty array if no elements match the selector', async () => {
// create a new puppeteer page
const page = await newE2EPage({
html: `
<empty-cmp-shadow></empty-cmp-shadow>
`,
});
const elm = await page.findAll('empty-cmp-shadow >>> .non-existent');
expect(elm).toEqual([]);
});
});
describe('Light DOM', () => {
it('returns `null` if the element does not exist', async () => {
// create a new puppeteer page
const page = await newE2EPage({
html: `
<empty-cmp></empty-cmp>
`,
});
const elm = await page.find('empty-cmp >>> .non-existent');
expect(elm).toBeNull();
});
it('returns an empty array if no elements match the selector', async () => {
// create a new puppeteer page
const page = await newE2EPage({
html: `
<empty-cmp></empty-cmp>
`,
});
const elm = await page.findAll('empty-cmp >>> .non-existent');
expect(elm).toEqual([]);
});
});
});