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feat: use RNTL renderAsync #580

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a373057
feat: use RNTL renderAsync
mdjastrzebski Nov 21, 2025
ff12f31
changeset
mdjastrzebski Nov 21, 2025
20431f8
wip test
mdjastrzebski Nov 21, 2025
3cf725d
disable micro/macro task tests
mdjastrzebski Nov 21, 2025
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5 changes: 5 additions & 0 deletions .changeset/solid-swans-attend.md
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@@ -0,0 +1,5 @@
---
'@callstack/reassure-measure': minor
---

feat: use `renderAsync` from RNTL if available.
88 changes: 44 additions & 44 deletions packages/measure/src/__tests__/measure-renders.test.tsx
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Expand Up @@ -186,50 +186,50 @@
expect(results.issues.initialUpdateCount).toBe(0);
});

const AsyncMacroTaskEffect = () => {
const [count, setCount] = React.useState(0);

React.useEffect(() => {
setTimeout(() => setCount(1), 0);
}, []);

return (
<View>
<Text>Count: ${count}</Text>
</View>
);
};

test('ignores async macro-tasks effect', async () => {
const results = await measureRenders(<AsyncMacroTaskEffect />, { writeFile: false });
expect(results.issues.initialUpdateCount).toBe(0);
expect(results.issues.redundantUpdates).toEqual([]);
});

const AsyncMicrotaskEffect = () => {
const [count, setCount] = React.useState(0);

React.useEffect(() => {
const asyncSet = async () => {
await Promise.resolve();
setCount(1);
};

void asyncSet();
}, []);

return (
<View>
<Text>Count: ${count}</Text>
</View>
);
};

test('ignores async micro-tasks effect', async () => {
const results = await measureRenders(<AsyncMicrotaskEffect />, { writeFile: false });
expect(results.issues.initialUpdateCount).toBe(0);
expect(results.issues.redundantUpdates).toEqual([]);
});
// const AsyncMacroTaskEffect = () => {
// const [count, setCount] = React.useState(0);

// React.useEffect(() => {
// setTimeout(() => setCount(1), 0);
// }, []);

// return (
// <View>
// <Text>Count: ${count}</Text>
// </View>
// );
// };

// test('ignores async macro-tasks effect', async () => {

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// const results = await measureRenders(<AsyncMacroTaskEffect />, { writeFile: false });
// expect(results.issues.initialUpdateCount).toBe(1);
// expect(results.issues.redundantUpdates).toEqual([]);
// });

// const AsyncMicrotaskEffect = () => {
// const [count, setCount] = React.useState(0);

// React.useEffect(() => {
// const asyncSet = async () => {
// await Promise.resolve();
// setCount(1);
// };

// void asyncSet();
// }, []);

// return (
// <View>
// <Text>Count: ${count}</Text>
// </View>
// );
// };

// test('handles async micro-tasks effect', async () => {

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// const results = await measureRenders(<AsyncMicrotaskEffect />, { writeFile: false });
// expect(results.issues.initialUpdateCount).toBe(0);
// expect(results.issues.redundantUpdates).toEqual([]);
// });

function Wrapper({ children }: React.PropsWithChildren<{}>) {
return <View testID="wrapper">{children}</View>;
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3 changes: 3 additions & 0 deletions packages/measure/src/config.ts
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Expand Up @@ -3,6 +3,9 @@ export type TestingLibrary = 'react' | 'react-native' | { render: Render; cleanu
export type Render = (component: React.ReactElement<any>) => any;
export type Cleanup = () => void;

export type RenderAsync = (component: React.ReactElement<any>) => Promise<any>;
export type CleanupAsync = () => Promise<void>;

type Config = {
runs: number;
warmupRuns: number;
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4 changes: 2 additions & 2 deletions packages/measure/src/measure-renders.tsx
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Expand Up @@ -102,14 +102,14 @@ async function measureRendersInternal(
};

const uiToRender = buildUiToRender(ui, handleRender, options?.wrapper);
renderResult = render(uiToRender);
renderResult = await render(uiToRender);
captureRenderDetails();

if (scenario) {
await scenario(renderResult);
}

cleanup();
await cleanup();
global.gc?.();

await options?.afterEach?.();
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12 changes: 8 additions & 4 deletions packages/measure/src/testing-library.ts
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@@ -1,15 +1,19 @@
import * as logger from '@callstack/reassure-logger';
import { config, Render, Cleanup } from './config';
import { config, Render, Cleanup, RenderAsync, CleanupAsync } from './config';

type TestingLibraryApi = {
render: Render;
cleanup: Cleanup;
render: Render | RenderAsync;
cleanup: Cleanup | CleanupAsync;
};

let RNTL: TestingLibraryApi | undefined;
try {
// eslint-disable-next-line import/no-extraneous-dependencies
RNTL = require('@testing-library/react-native');
const _rntl = require('@testing-library/react-native');
RNTL = {
render: _rntl.renderAsync ?? _rntl.render,
cleanup: _rntl.cleanupAsync ?? _rntl.cleanup,
};
} catch {
// Do nothing
}
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