Adding application record tests.

Tests to make sure that all of the functionality of ApplicationRecord
exists, specifically namespacing and inheritence of configurations.

Author: wangjohn

activerecord/test/cases/application_record_test.rb

@@ -0,0 +1,159 @@
+require 'cases/helper'
+require 'models/topic'
+
+class ModelBaseInherited < ActiveRecord::Base
+  class << self
+    # Use the Man table
+    def table_name
+      "men"
+    end
+
+    def reset_configs
+      self.table_name_prefix = ""
+      self.table_name_suffix = ""
+    end
+  end
+end
+
+class ModelAppRecordInherited < ApplicationRecord
+end
+
+class ModelDoubleInherited < ModelAppRecordInherited
+end
+
+class ApplicationRecordTest < ActiveRecord::TestCase
+  fixtures :topics
+
+  def test_changing_prefix_on_ar_base
+    prefix = 'my_prefix'
+    ActiveRecord::Base.table_name_prefix = prefix
+    assert_equal prefix, ModelBaseInherited.table_name_prefix
+    assert_equal prefix, ModelAppRecordInherited.table_name_prefix
+  end
+
+  def test_changing_prefix_on_ar_base_inherited_model
+    prefix = 'my_prefix'
+    new_prefix = 'new_prefix'
+    ActiveRecord::Base.table_name_prefix = prefix
+    ModelBaseInherited.table_name_prefix = new_prefix
+
+    assert_equal new_prefix, ModelBaseInherited.table_name_prefix
+    assert_equal prefix, ActiveRecord::Base.table_name_prefix
+  end
+
+  def test_changing_prefix_on_application_record_inherited_model
+    prefix = 'my_prefix'
+    new_prefix = 'new_prefix'
+    ActiveRecord::Base.table_name_prefix = prefix
+    Topic.table_name_prefix = new_prefix
+
+    assert_equal new_prefix, Topic.table_name_prefix
+    assert_equal prefix, ActiveRecord::Base.table_name_prefix
+  end
+
+  def test_double_inheritence_rules
+    top_suffix = ActiveRecord::Base.table_name_suffix
+    new_suffix = 'some_new_suffix'
+    newest_suffix = 'an_even_newer_suffix'
+
+    ModelAppRecordInherited.table_name_suffix = new_suffix
+    assert_equal top_suffix, ActiveRecord::Base.table_name_suffix
+    assert_equal new_suffix, ModelAppRecordInherited.table_name_suffix
+    assert_equal new_suffix, ModelDoubleInherited.table_name_suffix
+
+    ModelDoubleInherited.table_name_suffix = newest_suffix
+    assert_equal top_suffix, ActiveRecord::Base.table_name_suffix
+    assert_equal new_suffix, ModelAppRecordInherited.table_name_suffix
+    assert_equal newest_suffix, ModelDoubleInherited.table_name_suffix
+  end
+
+  def test_creating_new_record_from_base_inherited
+    ModelBaseInherited.reset_configs
+
+    assert_nothing_raised do
+      ModelBaseInherited.new
+    end
+  end
+
+  def test_persisting_new_record_from_base_inherited
+    ModelBaseInherited.reset_configs
+
+    man = ModelBaseInherited.new
+    man.name = 'John Wang'
+    assert_nothing_raised { man.save }
+
+    assert_equal man.id, ModelBaseInherited.find_by_name('John Wang').id
+  end
+end
+
+class MultipleApplicationRecordTest < ActiveRecord::TestCase
+  module FirstNamespace
+    class ApplicationRecord < ::ApplicationRecord
+    end
+
+    class SomeModel < ApplicationRecord
+    end
+  end
+
+  module SecondNamespace
+    class ApplicationRecord < ::ApplicationRecord
+    end
+
+    class SomeModel < ApplicationRecord
+    end
+  end
+
+  def test_changing_config_in_namespaces_are_isolated
+    FirstNamespace::SomeModel.pluralize_table_names = false
+    SecondNamespace::SomeModel.pluralize_table_names = true
+
+    assert !FirstNamespace::SomeModel.pluralize_table_names
+    assert SecondNamespace::SomeModel.pluralize_table_names
+
+    FirstNamespace::SomeModel.pluralize_table_names = true
+  end
+
+  def test_changing_config_on_models_isolated_across_namespaces
+    format = :number
+    ApplicationRecord.cache_timestamp_format = format
+    assert_equal format, FirstNamespace::SomeModel.cache_timestamp_format
+    assert_equal format, SecondNamespace::SomeModel.cache_timestamp_format
+
+    new_format = :long
+    FirstNamespace::SomeModel.cache_timestamp_format = new_format
+    assert_equal format, ApplicationRecord.cache_timestamp_format
+    assert_equal new_format, FirstNamespace::SomeModel.cache_timestamp_format
+    assert_equal format, SecondNamespace::SomeModel.cache_timestamp_format
+  end
+
+  def test_changing_module_application_record_does_not_propogate
+    original_prefix = ApplicationRecord.table_name_prefix
+    first_prefix = 'first_prefix'
+    second_prefix = 'second_prefix'
+
+    FirstNamespace::ApplicationRecord.table_name_prefix = first_prefix
+    SecondNamespace::ApplicationRecord.table_name_prefix = second_prefix
+
+    assert_equal first_prefix, FirstNamespace::ApplicationRecord.table_name_prefix
+    assert_equal second_prefix, SecondNamespace::ApplicationRecord.table_name_prefix
+    assert_equal first_prefix, FirstNamespace::SomeModel.table_name_prefix
+    assert_equal second_prefix, SecondNamespace::SomeModel.table_name_prefix
+    assert_equal original_prefix, ApplicationRecord.table_name_prefix
+  end
+
+  def test_changing_config_on_model_does_not_move_up_ancestor_chain
+    base_scopes = ActiveRecord::Base.default_scopes
+    app_record_scopes = ApplicationRecord.default_scopes
+    first_namespace_scopes = FirstNamespace::ApplicationRecord.default_scopes
+    second_namespace_scopes = SecondNamespace::ApplicationRecord.default_scopes
+    new_scopes = [ proc {} ]
+
+    FirstNamespace::SomeModel.default_scopes = new_scopes
+
+    assert_equal new_scopes, FirstNamespace::SomeModel.default_scopes
+    assert_equal base_scopes, ActiveRecord::Base.default_scopes
+    assert_equal app_record_scopes, ApplicationRecord.default_scopes
+    assert_equal first_namespace_scopes, FirstNamespace::ApplicationRecord.default_scopes
+    assert_equal second_namespace_scopes, SecondNamespace::ApplicationRecord.default_scopes
+  end
+end