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require 'spec_helper'
module Arel
describe Join do
before do
@relation1 = Array.new([
[1, 'duck' ],
[2, 'duck' ],
[3, 'goose']
], [[:id, Attributes::Integer], [:name, Attributes::String]])
@relation2 = @relation1.alias
end
describe InnerJoin do
describe '#call' do
it 'combines the two tables where the predicate obtains' do
@relation1 \
.join(@relation2) \
.on(@relation1[:id].eq(@relation2[:id])) \
.tap do |relation|
rows = relation.call
rows.length.should == 3
@relation1.array.zip(rows).each do |tuple, row|
row.relation.should == relation
row.tuple.should == (tuple * 2)
end
end
end
end
end
end
end
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