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Testing Dataframe Cell Highlighting Implementation in Gradio-App

This test suite validates the correct highlighting behavior of table cells in a dataframe component. It specifically focuses on verifying CSS background-color properties for cells in the first row, ensuring proper visual formatting and styling implementation.

Test Coverage Overview

The test suite provides targeted coverage for table cell highlighting functionality.

Key areas tested include:

First cell background color verification
Second cell background color validation
Row-specific CSS class implementation (row_odd)
Background color opacity checks

Implementation Analysis

The testing approach utilizes Playwright’s page locator patterns for precise DOM element selection. The implementation leverages CSS property validation through toHaveCSS assertions, specifically targeting background-color properties with rgba values.

Key patterns include:

Chainable locator selectors
CSS property assertions
Index-based element selection

Technical Details

Testing tools and configuration:

Custom test utilities (@self/tootils)
Playwright page object model
CSS property validation assertions
DOM element locators
Background-color rgba validation

Best Practices Demonstrated

The test implementation showcases several testing best practices for UI component validation.

Notable practices include:

Atomic test scope focusing on specific functionality
Clear assertion messages
Efficient DOM element selection
Proper CSS property validation
Structured test organization

gradio-app/gradio

js/spa/test/dataframe_colorful.spec.ts

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

test("first couple of cells in table are highlighted correctly", async ({
	page
}) => {
	const first_td = await page.locator("tbody tr.row_odd td").first();
	await expect(first_td).not.toHaveCSS("background-color", "rgba(0, 0, 0, 0)");

	const second_td = await page.locator("tbody tr.row_odd td").nth(1);
	await expect(second_td).toHaveCSS("background-color", "rgba(0, 0, 0, 0)");
});