Add integration tests for detach mode - actually starting ganache det…

…ached. Slow tests, but probably worth it.

src/packages/cli/package.json

@@ -59,7 +59,8 @@
     "cross-env": "7.0.3",
     "mocha": "9.1.3",
     "ts-node": "10.4.0",
-    "typescript": "4.6.4"
+    "typescript": "4.6.4",
+    "superagent": "6.1.0"
   },
   "dependencies": {
     "@ganache/colors": "0.3.0",

src/packages/cli/src/detach.ts

@@ -1,4 +1,4 @@
-import { fork } from "child_process";
+import { fork, ForkOptions } from "child_process";
 import createInstanceName from "./process-name";
 import envPaths from "env-paths";
 import psList, { ProcessDescriptor } from "@trufflesuite/ps-list";
@@ -95,7 +95,8 @@ export async function startDetachedInstance(
     flavor?: FlavorName;
     server: { host: string; port: number };
   },
-  version: string
+  version: string,
+  forkOptions?: ForkOptions
 ): Promise<DetachedInstance> {
   const [bin, module, ...args] = argv;
 
@@ -105,6 +106,7 @@ export async function startDetachedInstance(
   const childArgs = [...args, "--no-detach"];
 
   const child = fork(module, childArgs, {
+    ...forkOptions,
     stdio: ["ignore", "ignore", "pipe", "ipc"],
     detached: true
   });