59 lines
1.7 KiB
Ruby
59 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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describe Postgresql::ReplicationSlot do
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describe '.in_use?' do
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it 'returns true when replication slots are present' do
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expect(described_class).to receive(:exists?).and_return(true)
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expect(described_class.in_use?).to be_truthy
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end
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it 'returns false when replication slots are not present' do
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expect(described_class.in_use?).to be_falsey
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end
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it 'returns false if the existence check is invalid' do
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expect(described_class).to receive(:exists?).and_raise(ActiveRecord::StatementInvalid.new('PG::FeatureNotSupported'))
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expect(described_class.in_use?).to be_falsey
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end
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end
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describe '.lag_too_great?' do
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before do
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expect(described_class).to receive(:in_use?).and_return(true)
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end
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it 'returns true when replication lag is too great' do
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expect(described_class)
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.to receive(:pluck)
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.and_return([125.megabytes])
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expect(described_class.lag_too_great?).to eq(true)
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end
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it 'returns false when more than one replicas is up to date enough' do
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expect(described_class)
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.to receive(:pluck)
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.and_return([125.megabytes, 0.megabytes, 0.megabytes])
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expect(described_class.lag_too_great?).to eq(false)
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end
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it 'returns false when replication lag is not too great' do
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expect(described_class)
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.to receive(:pluck)
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.and_return([0.megabytes])
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expect(described_class.lag_too_great?).to eq(false)
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end
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it 'returns false when there is a nil replication lag' do
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expect(described_class)
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.to receive(:pluck)
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.and_return([0.megabytes, nil])
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expect(described_class.lag_too_great?).to eq(false)
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end
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end
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end
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