Refactoring

src/functions/child.ts

@@ -0,0 +1,14 @@
+import { ChildProcess } from "child_process";
+import { duplex } from "./baseFunctions";
+/**
+ * Return a Duplex stream from a child process' stdin and stdout
+ * @param childProcess Child process from which to create duplex stream
+ */
+export function child(childProcess: ChildProcess) {
+    if (childProcess.stdin === null) {
+        throw new Error("childProcess.stdin is null");
+    } else if (childProcess.stdout === null) {
+        throw new Error("childProcess.stdout is null");
+    }
+    return duplex(childProcess.stdin, childProcess.stdout);
+}