test: Make oclif commands testable (#3571)

* ➕ Add `@oclif/core`

* 📦 Update `package-lock.json`

* 📘 Export `Logger` for use as type

* ✨ Create `BaseCommand`

* 🐛 Prevent DB re-init

* ♻️ Refactor `reset` command

* 🧪 Fix `reset` test

* 👕 Add lint exception

Co-authored-by: Jan Oberhauser <janober@users.noreply.github.com>

packages/cli/src/Logger.ts

@@ -2,6 +2,7 @@
 /* eslint-disable @typescript-eslint/no-shadow */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 /* eslint-disable @typescript-eslint/no-unsafe-return */
+
 import { inspect } from 'util';
 import winston from 'winston';
 
@@ -11,7 +12,7 @@ import callsites from 'callsites';
 import { basename } from 'path';
 import config from '../config';
 
-class Logger implements ILogger {
+export class Logger implements ILogger {
 	private logger: winston.Logger;
 
 	constructor() {
@@ -71,7 +72,7 @@ class Logger implements ILogger {
 		}
 	}
 
-	log(type: LogTypes, message: string, meta: object = {}) {
+	log(type: LogTypes, message: string, meta: object = {}): void {
 		const callsite = callsites();
 		// We are using the third array element as the structure is as follows:
 		// [0]: this file
@@ -93,23 +94,23 @@ class Logger implements ILogger {
 
 	// Convenience methods below
 
-	debug(message: string, meta: object = {}) {
+	debug(message: string, meta: object = {}): void {
 		this.log('debug', message, meta);
 	}
 
-	info(message: string, meta: object = {}) {
+	info(message: string, meta: object = {}): void {
 		this.log('info', message, meta);
 	}
 
-	error(message: string, meta: object = {}) {
+	error(message: string, meta: object = {}): void {
 		this.log('error', message, meta);
 	}
 
-	verbose(message: string, meta: object = {}) {
+	verbose(message: string, meta: object = {}): void {
 		this.log('verbose', message, meta);
 	}
 
-	warn(message: string, meta: object = {}) {
+	warn(message: string, meta: object = {}): void {
 		this.log('warn', message, meta);
 	}
 }