remove stray redis dependency, and upgrade node in tests (#173)

* remove stray redis dependency in test
* tweak handling of database connection between tests
* upgrade node versions in tests, type guessing in node 10 has problems

test/nbrowser/testServer.ts

@@ -23,6 +23,7 @@ import {driver, IMochaServer, WebDriver} from 'mocha-webdriver';
 import fetch from 'node-fetch';
 import {tmpdir} from 'os';
 import * as path from 'path';
+import {removeConnection} from 'test/gen-server/seed';
 import {HomeUtil} from 'test/nbrowser/homeUtil';
 
 export class TestServerMerged implements IMochaServer {
@@ -38,7 +39,7 @@ export class TestServerMerged implements IMochaServer {
   private _server: ChildProcess;
   private _exitPromise: Promise<number|string>;
   private _starts: number = 0;
-  private _dbManager: HomeDBManager;
+  private _dbManager?: HomeDBManager;
   private _driver: WebDriver;
 
   // The name is used to name the directory for server logs and data.
@@ -244,6 +245,11 @@ export class TestServerMerged implements IMochaServer {
     return this._dbManager;
   }
 
+  public async closeDatabase() {
+    this._dbManager = undefined;
+    await removeConnection();
+  }
+
   public get driver() {
     return this._driver || driver;
   }

test/nbrowser/testUtils.ts

@@ -98,6 +98,10 @@ export function setupTestSuite(options?: TestSuiteOptions) {
   // always call resume.
   afterEach(() => server.resume());
 
+  // Close database until next test explicitly needs it, to avoid conflicts
+  // with tests that don't use the same server.
+  after(async () => server.closeDatabase());
+
   return setupRequirement({team: true, ...options});
 }