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migration_generator_test.rb
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migration_generator_test.rb
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require 'generators/generators_test_helper'
require 'rails/generators/rails/migration/migration_generator'
class MigrationGeneratorTest < Rails::Generators::TestCase
include GeneratorsTestHelper
def test_migration
migration = "change_title_body_from_posts"
run_generator [migration]
assert_migration "db/migrate/#{migration}.rb", /class ChangeTitleBodyFromPosts < ActiveRecord::Migration/
end
def test_migrations_generated_simultaneously
migrations = ["change_title_body_from_posts", "change_email_from_comments"]
first_migration_number, second_migration_number = migrations.collect do |migration|
run_generator [migration]
file_name = migration_file_name "db/migrate/#{migration}.rb"
File.basename(file_name).split('_').first
end
assert_not_equal first_migration_number, second_migration_number
end
def test_migration_with_class_name
migration = "ChangeTitleBodyFromPosts"
run_generator [migration]
assert_migration "db/migrate/change_title_body_from_posts.rb", /class #{migration} < ActiveRecord::Migration/
end
def test_add_migration_with_attributes
migration = "add_title_body_to_posts"
run_generator [migration, "title:string", "body:text"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :change, content do |up|
assert_match(/add_column :posts, :title, :string/, up)
assert_match(/add_column :posts, :body, :text/, up)
assert_no_match(/\n\n/, up)
end
end
end
def test_remove_migration_with_attributes
migration = "remove_title_body_from_posts"
run_generator [migration, "title:string", "body:text"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :up, content do |up|
assert_match(/remove_column :posts, :title/, up)
assert_match(/remove_column :posts, :body/, up)
end
assert_method :down, content do |down|
assert_match(/add_column :posts, :title, :string/, down)
assert_match(/add_column :posts, :body, :text/, down)
end
end
end
def test_add_migration_with_attributes_and_indices
migration = "add_title_with_index_and_body_to_posts"
run_generator [migration, "title:string:index", "body:text", "user_id:integer:uniq"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :change, content do |up|
assert_match(/add_column :posts, :title, :string/, up)
assert_match(/add_column :posts, :body, :text/, up)
assert_match(/add_column :posts, :user_id, :integer/, up)
end
assert_match(/add_index :posts, :title/, content)
assert_match(/add_index :posts, :user_id, :unique => true/, content)
end
end
def test_add_migration_with_attributes_and_wrong_index_declaration
migration = "add_title_and_content_to_books"
run_generator [migration, "title:string:inex", "content:text", "user_id:integer:unik"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :change, content do |up|
assert_match(/add_column :books, :title, :string/, up)
assert_match(/add_column :books, :content, :text/, up)
assert_match(/add_column :books, :user_id, :integer/, up)
end
assert_no_match(/add_index :books, :title/, content)
assert_no_match(/add_index :books, :user_id/, content)
end
end
def test_add_migration_with_attributes_without_type_and_index
migration = "add_title_with_index_and_body_to_posts"
run_generator [migration, "title:index", "body:text", "user_uuid:uniq"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :change, content do |up|
assert_match(/add_column :posts, :title, :string/, up)
assert_match(/add_column :posts, :body, :text/, up)
assert_match(/add_column :posts, :user_uuid, :string/, up)
end
assert_match(/add_index :posts, :title/, content)
assert_match(/add_index :posts, :user_uuid, :unique => true/, content)
end
end
def test_add_migration_with_attributes_index_declaration_and_attribute_options
migration = "add_title_and_content_to_books"
run_generator [migration, "title:string{40}:index", "content:string{255}", "price:decimal{1,2}:index", "discount:decimal{3.4}:uniq"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :change, content do |up|
assert_match(/add_column :books, :title, :string, :limit => 40/, up)
assert_match(/add_column :books, :content, :string, :limit => 255/, up)
assert_match(/add_column :books, :price, :decimal,/, up)
assert_match(/, :precision => 1/, up)
assert_match(/, :scale => 2/, up)
assert_match(/add_column :books, :discount, :decimal,/, up)
assert_match(/, :precision => 3/, up)
assert_match(/, :scale => 4/, up)
end
assert_match(/add_index :books, :title/, content)
assert_match(/add_index :books, :price/, content)
assert_match(/add_index :books, :discount, :unique => true/, content)
end
end
def test_should_create_empty_migrations_if_name_not_start_with_add_or_remove
migration = "create_books"
run_generator [migration, "title:string", "content:text"]
assert_migration "db/migrate/#{migration}.rb" do |content|
assert_method :up, content do |up|
assert_match(/^\s*$/, up)
end
assert_method :down, content do |down|
assert_match(/^\s*$/, down)
end
end
end
end