pooyash1998_chartspark/tests/utils/colors.test.ts

import { getColors, withOpacity } from '../../src/utils/colors';

describe('getColors', () => {
	it('returns the requested number of colors', () => {
		expect(getColors(3)).toHaveLength(3);
		expect(getColors(10)).toHaveLength(10);
	});

	it('wraps around palette for counts > palette size', () => {
		const colors = getColors(12);
		expect(colors).toHaveLength(12);
		colors.forEach(c => expect(c).toMatch(/^#[0-9a-f]{6}$/i));
	});

	it('returns hex strings', () => {
		getColors(5).forEach(c => expect(c).toMatch(/^#[0-9a-f]{6}$/i));
	});
});

describe('withOpacity', () => {
	it('converts hex to rgba with correct opacity', () => {
		expect(withOpacity('#4c9be8', 0.5)).toMatch(/^rgba\(76, 155, 232, 0\.5\)$/);
	});

	it('handles opacity 1', () => {
		expect(withOpacity('#ff0000', 1)).toBe('rgba(255, 0, 0, 1)');
	});

	it('handles opacity 0', () => {
		expect(withOpacity('#000000', 0)).toBe('rgba(0, 0, 0, 0)');
	});
});