Facility creator be + Unit tests scaffolding

package.json

@@ -5,7 +5,7 @@
   "main": "main.js",
   "scripts": {
     "start": "electron .",
-    "test": "jest",
+    "test": "jest --runInBand",
     "rebuild": "electron-rebuild -f -w sqlite3",
     "lint": "./node_modules/.bin/eslint"
   },

src/repository/DbContext.js

@@ -1,27 +1,42 @@
-const config = require('../services/config.json');
-let dbConfig = config.knexConfig;
 const fs = require('fs');
 const knex = require('knex');
 
-const getKnexObject = () => {
-    if (dbConfig.client === 'sqlite3') {
-        return getSqliteKnexObject();
-    }
-}
+const config = require('../services/config.json');
 
-module.exports = {
-    getKnexObject
-}
+const dbConfig = config.knexConfig;
 
 /**
  * Get knex object with sqlite client
  */
-function getSqliteKnexObject() {
-    const filepaths = config.sqlite_config.filepath;
-    for (let filepath of filepaths) {
-        if (fs.existsSync(filepath)) {
-            dbConfig.connection.filename = filepath;
-            return knex(dbConfig);
-        }
+function getSqliteKnexObject(ENV) {
+  const filename = (ENV === config.environment.name.Test)
+    ? config.sqlite_config.test_db
+    : config.sqlite_config.production_db;
+  const filepaths = config.sqlite_config.filepath;
+
+  filepaths.forEach((filepath) => {
+    const fullFilePath = filepath + filename;
+
+    if (fs.existsSync(fullFilePath)) {
+      dbConfig.connection.filename = fullFilePath;
+
+      return knex(dbConfig);
     }
-}
+
+    return null;
+  });
+
+  return new Error('Cannot get SQLite Knex object.');
+}
+
+const getKnexObject = (ENV = config.environment.name.Production) => {
+  if (dbConfig.client === 'sqlite3') {
+    return getSqliteKnexObject(ENV);
+  }
+
+  return new Error('Database is not SQLite 3.');
+};
+
+module.exports = {
+  getKnexObject,
+};