refactor: Move check if adapter exists to parseArgs

Author: relekang

src/db.js

@@ -1,21 +1,8 @@
 const promise = require('promise')
 
 function initDbAdapter(options) {
-  let adapter
-  const repeatCharacter = (char, n) => `${Array(n + 1).join(char)}`
   const adapterName = options.adapter
-
-  try {
-    adapter = require(`micro-analytics-adapter-${adapterName}`)
-  } catch (err) {
-    if (err.code === 'MODULE_NOT_FOUND') {
-      // Console.error a warning message, but normally exit the process to avoid printing ugly npm ERR lines and stack trace.
-      console.error(`\n${repeatCharacter(' ', 22)}⚠️ ERROR ⚠️\n${repeatCharacter('-', 55)}\nYou specified "${adapterName}" as the DB_ADAPTER, but no package\ncalled "micro-analytics-adapter-${adapterName}" was found.\n\nPlease make sure you spelled the name correctly and\nhave "npm install"ed the necessary adapter package!\n${repeatCharacter('-', 55)}\n`)
-      process.exit(0)
-    } else {
-      throw err
-    }
-  }
+  const adapter = require(`micro-analytics-adapter-${adapterName}`)
 
 
   module.exports.get = adapter.get

src/parseArgs.js

@@ -1,5 +1,7 @@
 const args = require('args');
 
+const repeatCharacter = (char, n) => `${Array(n + 1).join(char)}`
+
 function adapterNameFromArgs(argv) {
   for (let i = 0; i < argv.length; i++) {
     const arg = argv[i]
@@ -23,9 +25,15 @@ module.exports = function parseArgs(argv) {
     if (adapter.options) {
       options = adapter.options
     }
-  } catch (error) {
-    if (error.code !== "MODULE_NOT_FOUND") {
-      throw error;
+  } catch (err) {
+    if (err.code === 'MODULE_NOT_FOUND') {
+      if (process.env.NODE_ENV !== 'test') {
+      // Console.error a warning message, but normally exit the process to avoid printing ugly npm ERR lines and stack trace.
+      console.error(`\n${repeatCharacter(' ', 22)}⚠️ ERROR ⚠️\n${repeatCharacter('-', 55)}\nYou specified "${adapterName}" as the DB_ADAPTER, but no package\ncalled "micro-analytics-adapter-${adapterName}" was found.\n\nPlease make sure you spelled the name correctly and\nhave "npm install"ed the necessary adapter package!\n${repeatCharacter('-', 55)}\n`)
+      process.exit(0)
+      }
+    } else {
+      throw err
     }
   }