Use `--exit` to force termination of node after tests

package.json

@@ -23,7 +23,7 @@
     "test:lint": "eslint src --ext .ts",
     "test:prettier": "prettier \"src/**/*.ts\" --list-different",
     "test:spelling": "cspell \"{README.md,.github/*.md,src/**/*.ts}\"",
-    "test:unit": "nyc --silent mocha",
+    "test:unit": "nyc --silent mocha --exit",
     "test:lint-proto": "buf lint",
     "check-cli": "run-s test diff-integration-tests check-integration-tests",
     "check-integration-tests": "run-s check-integration-test:*",

src/lib/waku_relay.spec.ts

@@ -91,6 +91,8 @@ describe('Waku Relay', () => {
     });
 
     it('Js publishes to nim', async function () {
+      this.timeout(5000);
+
       const message = Message.fromUtf8String('This is a message');
       // TODO: nim-waku does follow the `StrictNoSign` policy hence we need to change
       // it for nim-waku to process our messages. Can be removed once

src/test_utils/nim_waku.ts

@@ -79,6 +79,7 @@ export class NimWaku {
 
   public stop() {
     this.process ? this.process.kill('SIGINT') : null;
+    this.process = undefined;
   }
 
   async waitForLog(msg: string) {