refractor code to allow more tests

tests/e2e/functional/proxy-routing.spec.ts

@@ -0,0 +1,66 @@
+/**
+ * Functional tests: basic reverse-proxy routing.
+ *
+ * Creates a real proxy host pointing at the echo-server container,
+ * then sends HTTP requests directly to Caddy and asserts the response
+ * comes from the upstream.
+ *
+ * Domain: func-proxy.test  (no DNS resolution needed — requests go to
+ * 127.0.0.1:80 with a custom Host header, which Caddy routes by hostname).
+ */
+import { test, expect } from '@playwright/test';
+import { createProxyHost } from '../../helpers/proxy-api';
+import { httpGet, waitForRoute } from '../../helpers/http';
+
+const DOMAIN = 'func-proxy.test';
+const ECHO_BODY = 'echo-ok';
+
+test.describe.serial('Proxy Routing', () => {
+  test('setup: create proxy host pointing at echo server', async ({ page }) => {
+    await createProxyHost(page, {
+      name: 'Functional Proxy Test',
+      domain: DOMAIN,
+      upstream: 'echo-server:8080',
+    });
+    await waitForRoute(DOMAIN);
+  });
+
+  test('routes HTTP requests to the upstream echo server', async () => {
+    const res = await httpGet(DOMAIN);
+    expect(res.status).toBe(200);
+    expect(res.body).toContain(ECHO_BODY);
+  });
+
+  test('proxies arbitrary paths to the upstream', async () => {
+    const res = await httpGet(DOMAIN, '/some/path?q=hello');
+    expect(res.status).toBe(200);
+    expect(res.body).toContain(ECHO_BODY);
+  });
+
+  test('unknown domain is not proxied to the echo server', async () => {
+    // Caddy may return 404 or redirect (308 HTTP→HTTPS) for unmatched routes —
+    // either way the request must not reach the echo upstream.
+    const res = await httpGet('no-such-route.test');
+    expect(res.status).not.toBe(200);
+    expect(res.body).not.toContain(ECHO_BODY);
+  });
+
+  test('disabled proxy host stops routing traffic', async ({ page }) => {
+    await page.goto('/proxy-hosts');
+    const row = page.locator('tr', { hasText: 'Functional Proxy Test' });
+    // Toggle the enabled switch (first checkbox inside the row)
+    await row.locator('input[type="checkbox"]').first().click({ force: true });
+    // Give Caddy time to reload config
+    await page.waitForTimeout(3_000);
+
+    const res = await httpGet(DOMAIN);
+    // Disabled host is removed from the route; Caddy may return 404 or
+    // redirect (308 HTTP→HTTPS) — either way the echo server is not reached.
+    expect(res.status).not.toBe(200);
+    expect(res.body).not.toContain(ECHO_BODY);
+
+    // Re-enable
+    await row.locator('input[type="checkbox"]').first().click({ force: true });
+    await page.waitForTimeout(2_000);
+  });
+});