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test: add a test for custom engine that does not respect root (#4777)

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Dmitry Gozman 2020-12-19 12:21:20 -08:00 committed by GitHub
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commit fc30c29a19
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18
test/selectors-register.spec.ts
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@ -123,3 +123,21 @@ it('should handle errors', async ({playwright, page}) => {
error = await playwright.selectors.register('css', createDummySelector).catch(e => e); error = await playwright.selectors.register('css', createDummySelector).catch(e => e);
expect(error.message).toBe('"css" is a predefined selector engine'); expect(error.message).toBe('"css" is a predefined selector engine');
}); });
it('should not rely on engines working from the root', async ({ playwright, page }) => {
const createValueEngine = () => ({
create(root, target) {
return undefined;
},
query(root, selector) {
return root && root.value.includes(selector) ? root : undefined;
},
queryAll(root, selector) {
return root && root.value.includes(selector) ? [root] : [];
},
});
await playwright.selectors.register('__value', createValueEngine);
await page.setContent(`<input id=input1 value=value1><input id=input2 value=value2>`);
expect(await page.$eval('input >> __value=value2', e => e.id)).toBe('input2');
});