diff options
Diffstat (limited to 'spec/support/migrations_helpers/schema_version_finder.rb')
| -rw-r--r-- | spec/support/migrations_helpers/schema_version_finder.rb | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/spec/support/migrations_helpers/schema_version_finder.rb b/spec/support/migrations_helpers/schema_version_finder.rb deleted file mode 100644 index b677db7ea26..00000000000 --- a/spec/support/migrations_helpers/schema_version_finder.rb +++ /dev/null @@ -1,34 +0,0 @@ -# frozen_string_literal: true - -# Sometimes data migration specs require adding invalid test data in order to test -# the migration (e.g. adding a row with null foreign key). Certain db migrations that -# add constraints (e.g. NOT NULL constraint) prevent invalid records from being added -# and data migration from being tested. For this reason, SchemaVersionFinder can be used -# to find and use schema prior to specified one. -# -# @example -# RSpec.describe CleanupThings, :migration, schema: MigrationHelpers::SchemaVersionFinder.migration_prior(AddNotNullConstraint) do ... -# -# SchemaVersionFinder returns schema version prior to the one specified, which allows to then add -# invalid records to the database, which in return allows to properly test data migration. -module MigrationHelpers - class SchemaVersionFinder - def self.migrations_paths - ActiveRecord::Migrator.migrations_paths - end - - def self.migration_context - ActiveRecord::MigrationContext.new(migrations_paths, ActiveRecord::SchemaMigration) - end - - def self.migrations - migration_context.migrations - end - - def self.migration_prior(migration_klass) - migrations.each_cons(2) do |previous, migration| - break previous.version if migration.name == migration_klass.name - end - end - end -end |