56 lines
1.7 KiB
Ruby
56 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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# The calling spec should use `:use_clean_rails_memory_store_caching`
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# when including this shared example. E.g.:
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#
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# describe MyCountService, :use_clean_rails_memory_store_caching do
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# it_behaves_like 'a counter caching service with threshold'
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# end
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RSpec.shared_examples 'a counter caching service with threshold' do
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let(:cache_key) { subject.cache_key }
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let(:under_threshold) { described_class::CACHED_COUNT_THRESHOLD - 1 }
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let(:over_threshold) { described_class::CACHED_COUNT_THRESHOLD + 1 }
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context 'when cache is empty' do
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before do
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Rails.cache.delete(cache_key)
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end
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it 'refreshes cache if value over threshold' do
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allow(subject).to receive(:uncached_count).and_return(over_threshold)
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expect(subject.count).to eq(over_threshold)
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expect(Rails.cache.read(cache_key)).to eq(over_threshold)
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end
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it 'does not refresh cache if value under threshold' do
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allow(subject).to receive(:uncached_count).and_return(under_threshold)
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expect(subject.count).to eq(under_threshold)
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expect(Rails.cache.read(cache_key)).to be_nil
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end
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end
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context 'when cached count is under the threshold value' do
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before do
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Rails.cache.write(cache_key, under_threshold)
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end
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it 'does not refresh cache' do
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expect(Rails.cache).not_to receive(:write)
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expect(subject.count).to eq(under_threshold)
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end
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end
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context 'when cached count is over the threshold value' do
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before do
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Rails.cache.write(cache_key, over_threshold)
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end
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it 'does not refresh cache' do
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expect(Rails.cache).not_to receive(:write)
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expect(subject.count).to eq(over_threshold)
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end
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end
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end
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