test(cmd-api-server): fix flaky runtime-plugin-imports test

Fixes hyperledger-cacti#1667
Signed-off-by: Youngone Lee <[email protected]>

Author: Leeyoungone

package.json

@@ -120,6 +120,7 @@
     "lerna": "4.0.0",
     "lint-staged": "11.1.2",
     "make-dir-cli": "3.0.0",
+    "node-cleanup": "2.1.2",
     "node-polyfill-webpack-plugin": "1.1.4",
     "npm-run-all": "4.1.5",
     "npm-watch": "0.11.0",

packages/cactus-test-cmd-api-server/src/test/typescript/integration/runtime-plugin-imports.test.ts

@@ -12,10 +12,12 @@ import {
   PluginImportType,
 } from "@hyperledger/cactus-core-api";
 
+const nodeCleanup = require("node-cleanup");
 const logLevel: LogLevelDesc = "TRACE";
 const testCase = "can import plugins at runtime (CLI)";
 describe(testCase, () => {
   let apiServer: ApiServer;
+
   test(testCase, async () => {
     const pluginsPath = path.join(
       __dirname, // start at the current file's path
@@ -67,5 +69,8 @@ describe(testCase, () => {
     ];
     await expect(apiServer.start()).not.toReject();
   });
-  afterAll(async () => await apiServer.shutdown());
+  afterAll(async () => {
+    await apiServer.shutdown();
+    nodeCleanup();
+  });
 });