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Testing Concurrent Heavy UI Rendering in Gradio

This test suite validates the concurrent rendering capabilities of heavy UI components in the Gradio application. It specifically focuses on testing the performance and reliability of rendering multiple textbox elements simultaneously.

Test Coverage Overview

The test suite provides comprehensive coverage for large-scale UI rendering scenarios.

Key aspects covered include:

Verification of 1000 textbox elements rendering
Concurrent rendering performance validation
UI component state management
DOM element count verification

Implementation Analysis

The testing approach utilizes Playwright’s page object model for UI interaction and validation. The implementation follows an asynchronous pattern to handle multiple UI events and rendering cycles, employing click events and element counting to verify the rendering process.

Technical patterns include:

Async/await for UI operations
Element selection via text content
Bulk element querying and counting
Jest-style assertions

Technical Details

Testing tools and configuration:

Custom test utilities (@self/tootils)
Playwright for browser automation
Page object interactions
Element locators using text and ARIA labels
Async test execution environment

Best Practices Demonstrated

The test demonstrates several testing best practices for UI-heavy applications.

Notable practices include:

Explicit wait patterns for UI events
Precise element selection strategies
Clear test case naming
Efficient bulk element verification
Proper async/await usage

gradio-app/gradio

js/spa/test/render_heavy_concurrently.spec.ts

            
import { test, expect } from "@self/tootils";

test("1000 total textboxes render", async ({ page }) => {
	await page.getByText("DONE 1", { exact: false }).click();
	await page.getByText("DONE 2", { exact: false }).click();

	const textboxes = await page.getByLabel("Textbox").all();
	expect(textboxes).toHaveLength(1000);
});