Vladimir

@vladimir.berlin

2159 Followers 169 Following

Team member of @vite.dev and @vitest.dev đź“Ť Berlin, Germany https://github.com/sheremet-va

an app with 342 modules + real deps is ~32% faster. 1022 modules + heavier deps is ~28% faster
A photo of Willow, Daniel, Vladimir (me), Mattias in front of County Hall that is lit in Pride colors at night
obama gives himself medal meme
The new trace viewer. It shows the state of the DOM at certain points and also shows when the state was changed in your code.
A graph showing a difference in downloads of vitest (50.6M) vs jest (42.8M)
Running tests with `--experimental.preParse` runs only a single test file unlike previously when it would only apply `.only` per test file
đź«Ł The graph of Vitest downloads on npmx.dev: 42.8M as of now. The graph starts slow, but jumps after the new year showing +20M more downloads in 3 months.
A screenshot of a PR with the title "feat: support deno runtime"
An example of the code that shows `aroundEach` wrapping every test with `db.transaction` call.
A screenshot from the docs showing a new `test.extend` pattern. Provide name of the fixture as the first argument, options in the second and value in the third. Return the value from the function for automatic type inference, and use `onCleanup` hook for an explicit cleanup.
A meme "do it for him" with a lot of pictures of Daniel Roe, who started a better alternative for NPM a week ago
An image from NPM showing vitest with 20,172,232 weekly downloads
The screenshot of code that shows how long it took to load each module next to the import declaration.
A screenshot of Vitest terminal showing the times for two runs. The first run takes 9.65s, the second run takes 5.90s.
A screenshot of a vscode window where the tests call `console.log(content)` and it is visible on the same line
A code example where playwright is imported as a function that accepts parameters instead of a string in the config. In this example playwright accepts an object "launchOptions" with "sloMo" set to 100
A screenshot of a code: const schema = z.object({ name: z.string(), email: z.email(), }); const validData = { name: 'John', email: 'john@example.com' }; expect(validData).toEqual(schema); expect({ email: "john@example.com" }).toEqual({ email: z.email() });
A benchmark showing that vitest-beta is 1.17 ± 0.01 times faster than Vitest 3. On average, the beta version takes 710ms and Vitest 3 takes 833ms.
The example of a test that tests an element is consistent between code changes. The code includes `expect(element).toMatchScreenshot('hero-secion')`
The screenshot from NPM showing that @vitest/browser package has 1,165,859 weekly downloads.
a screenshot of the Twitter account page for @sheremet_va, saying: 'This account doesn't exist. Try searching for another.'
A screenshot of a sidebar from the Vitest Node API documentation page
A terminal output of running “vitest” command. The test doesn’t await “expect.poll” assertion which fails the test with a tip to add an “await” statement