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Contents
require 'spec_helper'
describe '#sdiffstore(destination, key [, key, ...])' do
before do
@numbers = 'mock-redis-test:sdiffstore:numbers'
@evens = 'mock-redis-test:sdiffstore:evens'
@primes = 'mock-redis-test:sdiffstore:primes'
@destination = 'mock-redis-test:sdiffstore:destination'
(1..10).each { |i| @redises.sadd(@numbers, i) }
[2, 4, 6, 8, 10].each { |i| @redises.sadd(@evens, i) }
[2, 3, 5, 7].each { |i| @redises.sadd(@primes, i) }
end
it 'returns the number of elements in the resulting set' do
@redises.sdiffstore(@destination, @numbers, @evens).should == 5
end
it 'stores the resulting set' do
@redises.sdiffstore(@destination, @numbers, @evens)
@redises.smembers(@destination).should == %w[9 7 5 3 1]
end
it 'does not store empty sets' do
@redises.sdiffstore(@destination, @numbers, @numbers).should == 0
@redises.get(@destination).should be_nil
end
it 'treats missing keys as empty sets' do
@redises.sdiffstore(@destination, @evens, 'mock-redis-test:nonesuch')
@redises.smembers(@destination).should == %w[10 8 6 4 2]
end
it 'removes existing elements in destination' do
@redises.sadd(@destination, 42)
@redises.sdiffstore(@destination, @primes)
@redises.smembers(@destination).should == %w[7 5 3 2]
end
it 'raises an error if given 0 sets' do
lambda do
@redises.sdiffstore(@destination)
end.should raise_error(Redis::CommandError)
end
it 'raises an error if any argument is not a a set' do
@redises.set('mock-redis-test:notset', 1)
lambda do
@redises.sdiffstore(@destination, @numbers, 'mock-redis-test:notset')
end.should raise_error(Redis::CommandError)
lambda do
@redises.sdiffstore(@destination, 'mock-redis-test:notset', @numbers)
end.should raise_error(Redis::CommandError)
end
end
Version data entries
32 entries across 32 versions & 1 rubygems