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# frozen_string_literal: true
module NextFoundInstanceOf
ERROR_MESSAGE = 'NextFoundInstanceOf mock helpers can only be used with ActiveRecord targets'
def expect_next_found_instance_of(klass)
check_if_active_record!(klass)
stub_allocate(expect(klass), klass) do |expectation|
yield(expectation)
end
end
def allow_next_found_instance_of(klass)
check_if_active_record!(klass)
stub_allocate(allow(klass), klass) do |allowance|
yield(allowance)
end
end
private
def check_if_active_record!(klass)
raise ArgumentError.new(ERROR_MESSAGE) unless klass < ActiveRecord::Base
end
def stub_allocate(target, klass)
target.to receive(:allocate).and_wrap_original do |method|
method.call.tap do |allocation|
# ActiveRecord::Core.allocate returns a frozen object:
# https://github.com/rails/rails/blob/291a3d2ef29a3842d1156ada7526f4ee60dd2b59/activerecord/lib/active_record/core.rb#L620
# It's unexpected behavior and probably a bug in Rails
# Let's work it around by setting the attributes to default to unfreeze the object for now
allocation.instance_variable_set(:@attributes, klass._default_attributes)
yield(allocation)
end
end
end
end
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