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require 'spec_helper'
shared_examples_for 'AtomicInternalId' do
let(:validate_presence) { true }
describe '.has_internal_id' do
describe 'Module inclusion' do
subject { described_class }
it { is_expected.to include_module(AtomicInternalId) }
end
describe 'Validation' do
before do
allow_any_instance_of(described_class).to receive(:ensure_iid!) {}
end
it 'validates presence' do
instance.valid?
expect(instance.errors[:iid]).to include("can't be blank") if validate_presence
expect(instance.errors[:iid]).to include("is not a number") # numericality
end
end
describe 'Creating an instance' do
subject { instance.save! }
it 'saves a new instance properly' do
expect { subject }.not_to raise_error
end
end
describe 'internal id generation' do
subject { instance.save! }
it 'calls InternalId.generate_next and sets internal id attribute' do
iid = rand(1..1000)
expect(InternalId).to receive(:generate_next).with(instance, scope_attrs, usage, any_args).and_return(iid)
subject
expect(instance.public_send(internal_id_attribute)).to eq(iid)
end
it 'does not overwrite an existing internal id' do
instance.public_send("#{internal_id_attribute}=", 4711)
expect { subject }.not_to change { instance.public_send(internal_id_attribute) }
end
end
end
end
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