62 lines
1.9 KiB
Ruby
62 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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module NextFoundInstanceOf
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ERROR_MESSAGE = 'NextFoundInstanceOf mock helpers can only be used with ActiveRecord targets'
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HELPER_METHOD_PATTERN = /(?:allow|expect)_next_found_(?<number>\d+)_instances_of/.freeze
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def method_missing(method_name, ...)
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return super unless match_data = method_name.match(HELPER_METHOD_PATTERN)
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helper_method = method_name.to_s.sub("_#{match_data[:number]}", '')
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public_send(helper_method, *args, match_data[:number].to_i, &block)
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end
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def expect_next_found_instance_of(klass, &block)
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expect_next_found_instances_of(klass, nil, &block)
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end
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def expect_next_found_instances_of(klass, number)
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check_if_active_record!(klass)
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stub_allocate(expect(klass), klass, number) do |expectation|
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yield(expectation)
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end
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end
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def allow_next_found_instance_of(klass, &block)
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allow_next_found_instances_of(klass, nil, &block)
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end
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def allow_next_found_instances_of(klass, number)
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check_if_active_record!(klass)
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stub_allocate(allow(klass), klass, number) do |allowance|
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yield(allowance)
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end
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end
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private
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def check_if_active_record!(klass)
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raise ArgumentError, ERROR_MESSAGE unless klass < ActiveRecord::Base
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end
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def stub_allocate(target, klass, number)
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stub = receive(:allocate)
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stub.exactly(number).times if number
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target.to stub.and_wrap_original do |method|
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method.call.tap do |allocation|
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# ActiveRecord::Core.allocate returns a frozen object:
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# https://github.com/rails/rails/blob/291a3d2ef29a3842d1156ada7526f4ee60dd2b59/activerecord/lib/active_record/core.rb#L620
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# It's unexpected behavior and probably a bug in Rails
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# Let's work it around by setting the attributes to default to unfreeze the object for now
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allocation.instance_variable_set(:@attributes, klass._default_attributes)
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yield(allocation)
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end
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end
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end
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end
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