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# frozen_string_literal: true
module Database
module MigrationTestingHelpers
def define_background_migration(name, with_base_class: true, scoping: nil)
klass = Class.new(with_base_class ? Gitlab::BackgroundMigration::BatchedMigrationJob : Object) do
operation_name :update if with_base_class
# Can't simply def perform here as we won't have access to the block,
# similarly can't define_method(:perform, &block) here as it would change the block receiver
define_method(:perform) { |*args| yield(*args) }
scope_to(scoping) if scoping
end
stub_const("Gitlab::BackgroundMigration::#{name}", klass)
klass
end
# Returns a hash of migration_class -> number of times perform was called.
# Sets up instrumentation of the provided array of migrations, as instances of their perform methods are called,
# the values in the hash update to count the calls.
def record_migration_call_counts(migrations)
call_counts = migrations.index_with { |_m| 0 }
migrations.each do |migration|
allow_next_instances_of(migration, nil) do |migration_instance|
allow(migration_instance).to receive(:perform).and_wrap_original do |method, *args, **kwargs|
call_counts[migration] += 1
method.call(*args, **kwargs)
end
end
end
call_counts
end
def expect_recorded_migration_runs(migrations_to_runs)
migrations_to_runs.each do |migration, runs|
path = File.join(result_dir, migration.name.demodulize)
if runs.zero?
expect(Pathname(path)).not_to be_exist
else
num_subdirs = Pathname(path).children.count(&:directory?)
expect(num_subdirs).to eq(runs)
end
end
end
def expect_migration_runs(migrations_to_run_counts)
call_counts = record_migration_call_counts(migrations_to_run_counts.keys)
yield
expect(call_counts).to eq(migrations_to_run_counts)
expect_recorded_migration_runs(migrations_to_run_counts)
end
end
end
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