Update test doco & add helpful errors

README.md

@@ -186,10 +186,20 @@ grunt migrate:up --file=001-create-users.js
 
 ## Running Tests
 
+Create `test/config.js` (see `test/config.example.js` for instructions)
+
+```bash
+npm test
 ```
-mocha test
+This will run the tests against all configurations inside `config.js`.
+To run against a single config:
+```bash
+ORM_PROTOCOL=mysql node test/run
+# OR
+ORM_PROTOCOL=mysql mocha test/integration
 ```
 
+
 ## Contributors
 
 Locomoters:

test/config.example.js

@@ -1,11 +1,10 @@
-// To test, rename this file to config.js and update
-// the following configuration
+// To test, copy this file to test/config.js and update the configuration.
 //
-// To run a single driver, go to root folder and do (mysql example):
+// To run a single driver, go to root folder and:
 // ORM_PROTOCOL=mysql node test/run
 //
 // To run all drivers:
-// node test/run
+// node test/run OR npm test
 
 exports.mysql = {
   protocol : 'mysql',

test/helpers.js

@@ -25,7 +25,15 @@ module.exports = {
     var protocol = this.protocol();
 
     if (!(protocol in config)) {
-      return cb(new Error("Protocol '" + protocol + "' missing in config.js"));
+      var emsg = "";
+
+      if (!protocol) {
+        emsg = "No protocol specified. Specify using: ORM_PROTOCOL=mysql mocha test/integration"
+      } else {
+        emsg = "Protocol '" + protocol + "' missing in config.js"
+      }
+
+      return cb(new Error(emsg));
     }
 
     orm.connect(config[protocol], function (err, connection) {