test: Add baseline memory test (#19102)

packages/testing/playwright/tests/performance/memory-consumption-cloud.spec.ts

@@ -0,0 +1,29 @@
+import { test, expect } from '../../fixtures/cloud';
+import { attachMetric, pollMemoryMetric } from '../../utils/performance-helper';
+
+test.describe('Memory Consumption', () => {
+	const CONTAINER_STABILIZATION_TIME = 20000;
+	const POLL_MEMORY_DURATION = 30000;
+	const STARTER_PLAN_MEMORY_LIMIT = 768;
+
+	test('Memory consumption baseline with starter plan resources @cloud:starter', async ({
+		cloudContainer,
+	}, testInfo) => {
+		// Wait for container to stabilize
+		await new Promise((resolve) => setTimeout(resolve, CONTAINER_STABILIZATION_TIME));
+
+		// Poll memory metric for 30 seconds to get baseline
+		const averageMemoryBytes = await pollMemoryMetric(
+			cloudContainer.baseUrl,
+			POLL_MEMORY_DURATION,
+			1000,
+		);
+		const averageMemoryMB = averageMemoryBytes / 1024 / 1024;
+
+		await attachMetric(testInfo, 'memory-consumption-baseline', averageMemoryMB, 'MB');
+
+		// Verify memory is within starter plan limits (768MB)
+		expect(averageMemoryMB).toBeLessThan(STARTER_PLAN_MEMORY_LIMIT);
+		expect(averageMemoryMB).toBeGreaterThan(100);
+	});
+});