Added test for bugfix/pg-delete-failed.

test/unit/sql/delete.test.js

+'use strict';
+
+/* jshint -W110 */
+var Support   = require(__dirname + '/../support')
+  , util = require('util')
+  , expectsql = Support.expectsql
+  , current   = Support.sequelize
+  , Sequelize = Support.Sequelize
+  , sql       = current.dialect.QueryGenerator;
+
+// Notice: [] will be replaced by dialect specific tick/quote character when there is not dialect specific expectation but only a default expectation
+
+suite(Support.getTestDialectTeaser('SQL'), function() {
+  suite('delete', function () {
+
+    suite('delete when the primary key has a different field name', function () {
+
+      var User = current.define('test_user', {
+        id: {
+          type:       Sequelize.INTEGER,
+          primaryKey: true,
+          field:      "test_user_id",
+        }
+      }, { freezeTableName: true, timestamps:false });
+
+      var options = {
+        table: 'test_user',
+        where: { 'test_user_id': 100 }
+      };
+
+      test(util.inspect(options, {depth: 2}), function () {
+        return expectsql(
+          sql.deleteQuery(
+            options.table,
+            options.where,
+            options,
+            User
+          ), {
+            postgres: 'DELETE FROM "test_user" WHERE "test_user_id" IN (SELECT "test_user_id" FROM "test_user" WHERE "test_user_id" = 100 LIMIT 1)',
+            sqlite:   'DELETE FROM `test_user` WHERE `test_user_id` = 100',
+            mssql:    'DELETE TOP(1) FROM [test_user] WHERE [test_user_id] = 100; SELECT @@ROWCOUNT AS AFFECTEDROWS;',
+            default:  'DELETE FROM [test_user] WHERE [test_user_id] = 100 LIMIT 1'
+          }
+        );
+      });
+
+    });
+  });
+});