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tests(e2e): Prepare for visual regression testing

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- fix some configuration issues
- mask or replace dynamic content from screenshots
- explain the behaviour in the e2e README

readme
This commit is contained in:
Otto Richter 2024-12-02 02:44:44 +01:00
parent 0cac04d3dd
commit 5929b330e4
5 changed files with 68 additions and 23 deletions
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31
tests/e2e/utils_e2e.ts
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@ -4,6 +4,15 @@ export const test = baseTest.extend({
context: async ({browser}, use) => {
return use(await test_context(browser));
},
// see https://playwright.dev/docs/test-fixtures#adding-global-beforeeachaftereach-hooks
forEachTest: [async ({page}, use) => {
await use();
// some tests create a new page which is not yet available here
// only operate on tests that make the URL available
if (page.url() !== 'about:blank') {
await save_visual(page);
}
}, {auto: true}],
});
async function test_context(browser: Browser, options?: BrowserContextOptions) {
@ -66,14 +75,28 @@ export async function save_visual(page: Page) {
// Optionally include visual testing
if (process.env.VISUAL_TEST) {
await page.waitForLoadState('domcontentloaded');
// Mock page/version string
await page.locator('footer div.ui.left').evaluate((node) => node.innerHTML = 'MOCK');
// Mock/replace dynamic content which can have different size (and thus cannot simply be masked below)
await page.locator('footer .left-links').evaluate((node) => node.innerHTML = 'MOCK');
// replace timestamps in repos to mask them later down
await page.locator('.flex-item-body > relative-time').filter({hasText: /now|minute/}).evaluateAll((nodes) => {
for (const node of nodes) node.outerHTML = 'relative time in repo';
});
await page.locator('relative-time').evaluateAll((nodes) => {
for (const node of nodes) node.outerHTML = 'time element';
});
// used for instance for security keys
await page.locator('absolute-date').evaluateAll((nodes) => {
for (const node of nodes) node.outerHTML = 'time element';
});
await expect(page).toHaveScreenshot({
fullPage: true,
timeout: 20000,
mask: [
page.locator('.secondary-nav span>img.ui.avatar'),
page.locator('.ui.dropdown.jump.item span>img.ui.avatar'),
page.locator('.ui.avatar'),
page.locator('.sha'),
page.locator('#repo_migrating'),
// update order of recently created repos is not fully deterministic
page.locator('.flex-item-main').filter({hasText: 'relative time in repo'}),
],
});
}