test: update makeScreenshot tests for simplified API

Author: achtaitaipai

tests/functional/makeScreenshot/index.test.ts

@@ -2,33 +2,12 @@ import { expect, it } from 'vitest'
 import { createGame, makeScreenshot } from '../../../dist'
 
 it('throws error if createGame is not called', () => {
-	expect(() => makeScreenshot()).toThrow(
+	expect(() => makeScreenshot('test')).toThrow(
 		'No visible canvas frames found for screenshot',
 	)
 })
 
-it('creates instance with correct methods', () => {
+it('executes without errors when game is created', () => {
 	createGame()
-	const screenshot = makeScreenshot()
-
-	expect(screenshot).toBeDefined()
-	expect(typeof screenshot.save).toBe('function')
-	expect(typeof screenshot.dataUrl).toBe('string')
-})
-
-it('dataUrl returns valid data URL', () => {
-	createGame()
-	const screenshot = makeScreenshot()
-	const dataUrl = screenshot.dataUrl
-
-	expect(dataUrl).toMatch(/^data:image\/png;base64,/)
-	expect(dataUrl.length).toBeGreaterThan(100)
-})
-
-it('save method exists and is callable', () => {
-	createGame()
-	const screenshot = makeScreenshot()
-
-	expect(() => screenshot.save).not.toThrow()
-	expect(typeof screenshot.save).toBe('function')
+	expect(() => makeScreenshot('test')).not.toThrow()
 })