Add change_column_test for mysql

Author: Stefan Wrobel

test/db/mysql/change_column_test.rb

@@ -0,0 +1,68 @@
+require 'jdbc_common'
+require 'db/mysql'
+
+class MysqlChangeColumnTest < Test::Unit::TestCase
+
+  class Person < ActiveRecord::Base; end
+
+  class CreatePeopleTable < ActiveRecord::Migration
+    def self.up
+      create_table :people do |t|
+        t.integer :phone
+      end
+    end
+
+    def self.down
+      drop_table :people
+    end
+  end
+
+  def setup
+    CreatePeopleTable.up
+  end
+
+  def teardown
+    CreatePeopleTable.down
+  end
+
+  def test_should_change_column_type
+    ActiveRecord::Migration.change_column :people, :phone, :string
+    Person.reset_column_information
+
+    p = Person.create!(:phone => 'ABC')
+    assert_equal 'ABC', p.phone
+  end
+
+  def test_sets_defaults_on_column
+    ActiveRecord::Migration.change_column :people, :phone, :string, :default => '123456'
+    Person.reset_column_information
+
+    p = Person.create!
+    assert_equal '123456', p.phone
+  end
+
+  def test_should_change_column_default_value
+    ActiveRecord::Migration.add_column    :people, :email, :string, :default => '[email protected]'
+    ActiveRecord::Migration.change_column :people, :email, :string, :default => '[email protected]'
+    Person.reset_column_information
+
+    p = Person.create!
+    assert_equal '[email protected]', p.email
+  end
+
+  def test_should_set_non_null_restriction
+    ActiveRecord::Migration.change_column :people, :phone, :string, :null => false
+    Person.reset_column_information
+    assert_raise(ActiveRecord::StatementInvalid) { Person.create! }
+  end
+
+  def test_should_set_null_restriction_with_default
+    p = Person.create!
+    ActiveRecord::Migration.change_column :people, :phone, :string, :null => true, :default => '123456'
+    Person.reset_column_information
+
+    assert_nil p.reload.phone
+    assert_equal '123456', Person.create!.phone
+  end
+end
+