feat(tests): add Deno-based tests for checking CLI functionality in the same-codebase between platforms.

src/apps/cli/testdeno/test-p2p-host.ts

@@ -0,0 +1,40 @@
+import { assert } from "@std/assert";
+import { TempDir } from "./helpers/temp.ts";
+import { initSettingsFile, applyP2pSettings } from "./helpers/settings.ts";
+import { startP2pRelay, stopP2pRelay, isLocalP2pRelay } from "./helpers/docker.ts";
+import { startCliInBackground } from "./helpers/backgroundCli.ts";
+
+Deno.test("p2p-host: starts and becomes ready", async () => {
+    const relay = Deno.env.get("RELAY") ?? "ws://localhost:4000/";
+    const roomId = Deno.env.get("ROOM_ID") ?? `room-${Date.now()}`;
+    const passphrase = Deno.env.get("PASSPHRASE") ?? "test";
+    const appId = Deno.env.get("APP_ID") ?? "self-hosted-livesync-cli-tests";
+    const useInternalRelay = Deno.env.get("USE_INTERNAL_RELAY") !== "0";
+
+    await using workDir = await TempDir.create("livesync-cli-p2p-host");
+    const vaultDir = workDir.join("vault-host");
+    const settingsFile = workDir.join("settings-host.json");
+    await Deno.mkdir(vaultDir, { recursive: true });
+
+    let relayStarted = false;
+    if (useInternalRelay && isLocalP2pRelay(relay)) {
+        await startP2pRelay();
+        relayStarted = true;
+    }
+
+    try {
+        await initSettingsFile(settingsFile);
+        await applyP2pSettings(settingsFile, roomId, passphrase, appId, relay);
+        const host = startCliInBackground(vaultDir, "--settings", settingsFile, "p2p-host");
+        try {
+            await host.waitUntilContains("P2P host is running", 20000);
+            assert(host.combined.includes("P2P host is running"));
+        } finally {
+            await host.stop();
+        }
+    } finally {
+        if (relayStarted) {
+            await stopP2pRelay().catch(() => {});
+        }
+    }
+});