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module SimpleNavigation
describe ItemsProvider do
let(:items_provider) { ItemsProvider.new(provider) }
describe '#items' do
let(:items) { double(:items) }
context 'when provider is a symbol' do
let(:context) { double(:context, provider_method: items) }
let(:provider) { :provider_method }
before { allow(SimpleNavigation).to receive_messages(context_for_eval: context) }
it 'retrieves the items from the evaluation context' do
expect(items_provider.items).to eq items
end
end
context 'when provider responds to :items' do
let(:provider) { double(:provider, items: items) }
it 'retrieves the items from the provider object' do
expect(items_provider.items).to eq items
end
end
context 'provider is a collection' do
let(:provider) { [] }
it 'retrieves the items by returning the provider' do
expect(items_provider.items).to eq provider
end
end
context 'when provider is something else' do
let(:provider) { double(:provider) }
it 'raises an exception' do
expect{ items_provider.items }.to raise_error
end
end
end
end
end
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