fix assert, make the test case more clear

test/exclude-base-props.test.js

@@ -14,24 +14,27 @@ var ModelBuilder = jdb.ModelBuilder;
 describe('exclude properties ', function() {
   it('from base model', function(done) {
     var ds = new ModelBuilder();
-    // this excludes id property from 'base: Model' We still need to pass in idInjection: false since User model tries to
-    // add id again to the model.
-    var User = ds.define('User', {name: String, password: String},
-      {idInjection: false, excludeBaseProperties: ['id']});
-    // User will have these properties: name, password
+    // create a base model User which has name and password properties. id property gets
+    // internally created for the User Model
+    var User = ds.define('User', {name: String, password: String});
     var properties = User.definition.properties;
-    assert(('name', 'password' in properties));
-    // id should not be found in the properties list
-    assert(!('id' in properties));
-    // this excludes id property from the base model and and password property coming from base 'User' model since customer is
-    // extended from User.
+    // User should have id, name & password properties
+    assert(('id' in properties)  && ('password' in properties) && ('name' in properties),
+      'User should have id, name & password properties');
+    // Create sub model Customer with vip as property. id property gets automatically created here as well.
+    // Customer will inherit name, password and id from base User model.
+    // With excludeBaseProperties, 'password' and 'id' gets excluded from base User model
+    // With idInjection: false - id property of sub Model Customer gets excluded. At the end
+    // User will have these 2 properties: name (inherited from User model) and vip (from customer Model).
     var Customer = User.extend('Customer', {vip: {type: String}},
-      {idInjection: false, excludeBaseProperties: ['password']});
-    // Customer will have these properties: name(from UserModel) & vip
+      {idInjection: false, excludeBaseProperties: ['password', 'id']});
+    // Customer should have these properties: name(from UserModel) & vip
     properties = Customer.definition.properties;
-    assert(('name', 'vip' in properties));
-    // id and password properties should not be found in the properties list
-    assert(!('id', 'password' in properties));
+    assert(('name' in properties) && ('vip' in properties),
+      'Customer should have name and vip properties');
+    // id or password properties should not be found in the properties list
+    assert(!(('id' in properties) || ('password' in properties)),
+      'Customer should not have id or password properties');
     done();
   });
 });