Implement first integration tests

tests/health.test.ts

@@ -0,0 +1,13 @@
+import { expect, test } from '@playwright/test';
+
+test('healthy test', async ({ playwright }) => {
+	const context = await playwright.request.newContext();
+	const response = await context.get('health');
+	await expect(response.status()).toBe(200);
+    await expect(response.headers()).toHaveProperty('healthy');
+    await expect(response.headers()['healthy']).toBe('true');
+
+    const body = await response.json();
+    await expect(body).toHaveProperty('status');
+    await expect(body['status']).toBe('OK');
+});

tests/requestid.test.ts

@@ -0,0 +1,37 @@
+import { expect, test } from '@playwright/test';
+import { validate, NIL } from 'uuid';
+import { requestIdHeader } from '$lib';
+
+test('response contains request-id header', async ({playwright}) => {
+	const context = await playwright.request.newContext();
+	const response = await context.get('health');
+    const headers = response.headers();
+    await expect(headers).toHaveProperty(requestIdHeader);
+});
+
+test('request-id is valid uuid', async ({playwright}) => {
+	const context = await playwright.request.newContext();
+	const response = await context.get('health');
+    const headers = response.headers();
+    const requestId = headers[requestIdHeader];
+    await expect(validate(requestId)).toBe(true);
+});
+
+test('reuse valid incoming uuid', async ({playwright}) => {
+	const context = await playwright.request.newContext();
+
+	const response = await context.get('health', { headers: { [requestIdHeader]: NIL }});
+    const headers = response.headers();
+    const requestId = headers[requestIdHeader];
+    await expect(requestId).toBe(NIL);
+});
+
+test('ignore invalid incoming uuid', async ({playwright}) => {
+    const invalid = '00000000-0000-0000-0000-00000000000z';
+	const context = await playwright.request.newContext();
+
+	const response = await context.get('health', { headers: { [requestIdHeader]: invalid }});
+    const headers = response.headers();
+    const requestId = headers[requestIdHeader];
+    await expect(requestId).not.toBe(invalid);
+});