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# frozen_string_literal: true
require "generators/generators_test_helper"
require "rails/generators/rails/migration/migration_generator"
class CreateMigrationTest < Rails::Generators::TestCase
include GeneratorsTestHelper
class Migrator < Rails::Generators::MigrationGenerator
include Rails::Generators::Migration
def self.next_migration_number(dirname)
current_migration_number(dirname) + 1
end
end
tests Migrator
def default_destination_path
"db/migrate/create_articles.rb"
end
def create_migration(destination_path = default_destination_path, config = {}, generator_options = {}, &block)
migration_name = File.basename(destination_path, ".rb")
generator([migration_name], generator_options)
generator.set_migration_assigns!(destination_path)
dir, base = File.split(destination_path)
timestamped_destination_path = File.join(dir, ["%migration_number%", base].join("_"))
@migration = Rails::Generators::Actions::CreateMigration.new(generator, timestamped_destination_path, block || "contents", config)
end
def migration_exists!(*args)
@existing_migration = create_migration(*args)
invoke!
@generator = nil
end
def invoke!
capture(:stdout) { @migration.invoke! }
end
def revoke!
capture(:stdout) { @migration.revoke! }
end
def test_invoke
create_migration
assert_match(/create db\/migrate\/1_create_articles\.rb\n/, invoke!)
assert_file @migration.destination
end
def test_invoke_pretended
create_migration(default_destination_path, {}, { pretend: true })
assert_no_file @migration.destination
end
def test_invoke_when_exists
migration_exists!
create_migration
assert_equal @existing_migration.destination, @migration.existing_migration
end
def test_invoke_when_exists_identical
migration_exists!
create_migration
assert_match(/identical db\/migrate\/1_create_articles\.rb\n/, invoke!)
assert_predicate @migration, :identical?
end
def test_invoke_when_exists_not_identical
migration_exists!
create_migration { "different content" }
assert_raise(Rails::Generators::Error) { invoke! }
end
def test_invoke_forced_when_exists_not_identical
dest = "db/migrate/migration.rb"
migration_exists!(dest)
create_migration(dest, force: true) { "different content" }
stdout = invoke!
assert_match(/remove db\/migrate\/1_migration\.rb\n/, stdout)
assert_match(/create db\/migrate\/2_migration\.rb\n/, stdout)
assert_file @migration.destination
assert_no_file @existing_migration.destination
end
def test_invoke_forced_pretended_when_exists_not_identical
migration_exists!
create_migration(default_destination_path, { force: true }, { pretend: true }) do
"different content"
end
stdout = invoke!
assert_match(/remove db\/migrate\/1_create_articles\.rb\n/, stdout)
assert_match(/create db\/migrate\/2_create_articles\.rb\n/, stdout)
assert_no_file @migration.destination
end
def test_invoke_skipped_when_exists_not_identical
migration_exists!
create_migration(default_destination_path, {}, { skip: true }) { "different content" }
assert_match(/skip db\/migrate\/2_create_articles\.rb\n/, invoke!)
assert_no_file @migration.destination
end
def test_revoke
migration_exists!
create_migration
assert_match(/remove db\/migrate\/1_create_articles\.rb\n/, revoke!)
assert_no_file @existing_migration.destination
end
def test_revoke_pretended
migration_exists!
create_migration(default_destination_path, {}, { pretend: true })
assert_match(/remove db\/migrate\/1_create_articles\.rb\n/, revoke!)
assert_file @existing_migration.destination
end
def test_revoke_when_no_exists
create_migration
assert_match(/remove db\/migrate\/1_create_articles\.rb\n/, revoke!)
end
end
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