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require "cases/helper"
class SchemaMigrationsTest < ActiveRecord::Mysql2TestCase
def test_renaming_index_on_foreign_key
connection.add_index "engines", "car_id"
connection.add_foreign_key :engines, :cars, name: "fk_engines_cars"
connection.rename_index("engines", "index_engines_on_car_id", "idx_renamed")
assert_equal ["idx_renamed"], connection.indexes("engines").map(&:name)
ensure
connection.remove_foreign_key :engines, name: "fk_engines_cars"
end
def test_initializes_schema_migrations_for_encoding_utf8mb4
smtn = ActiveRecord::Migrator.schema_migrations_table_name
connection.drop_table smtn, if_exists: true
database_name = connection.current_database
database_info = connection.select_one("SELECT * FROM information_schema.schemata WHERE schema_name = '#{database_name}'")
original_charset = database_info["DEFAULT_CHARACTER_SET_NAME"]
original_collation = database_info["DEFAULT_COLLATION_NAME"]
execute("ALTER DATABASE #{database_name} DEFAULT CHARACTER SET utf8mb4")
connection.initialize_schema_migrations_table
limit = ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter::MAX_INDEX_LENGTH_FOR_CHARSETS_OF_4BYTES_MAXLEN
assert connection.column_exists?(smtn, :version, :string, limit: limit)
ensure
execute("ALTER DATABASE #{database_name} DEFAULT CHARACTER SET #{original_charset} COLLATE #{original_collation}")
end
private
def connection
@connection ||= ActiveRecord::Base.connection
end
def execute(sql)
connection.execute(sql)
end
end
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