42 lines
1.2 KiB
Ruby
42 lines
1.2 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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def expect_next_found_instance_of(klass)
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check_if_active_record!(klass)
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stub_allocate(expect(klass), klass) 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)
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check_if_active_record!(klass)
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stub_allocate(allow(klass), klass) 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)
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target.to receive(:allocate).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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