add failing test for postgresql when primary key is not the first column when insert_returning

Author: satyanash

test/db/postgresql/primary_key_is_not_the_first_column_test.rb

@@ -0,0 +1,37 @@
+require 'test_helper'
+require 'db/postgres'
+
+class PrimaryKeyIsNotTheFirstColumnTest < Test::Unit::TestCase
+
+  class CreateEmployees < ActiveRecord::Migration[4.2]
+    def self.up
+      create_table 'employees', :id => false do |t|
+        t.string :full_name, :null => false
+        t.primary_key :id, :serial
+      end
+    end
+    def self.down
+      drop_table 'employees'
+    end
+  end
+
+  def setup
+    CreateEmployees.up
+  end
+
+  def teardown
+    CreateEmployees.down
+  end
+
+  class Employee < ActiveRecord::Base
+  end
+
+  def test_returning_when_primary_key_is_not_the_first_column
+    e = Employee.new
+    e.full_name = 'Slartibartfast'
+    e.save!
+    e.reload
+    assert_equal 1, e.id
+  end
+
+end