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require File.join(File.dirname(__FILE__), '..', 'spec_helper')
describe SelectionRelation do
before do
@relation1 = TableRelation.new(:foo)
@relation2 = TableRelation.new(:bar)
@predicate1 = EqualityPredicate.new(@relation1[:id], @relation2[:foo_id])
@predicate2 = LessThanPredicate.new(@relation1[:age], 2)
end
describe '==' do
it "obtains if both the predicate and the relation are identical" do
SelectionRelation.new(@relation1, @predicate1). \
should == SelectionRelation.new(@relation1, @predicate1)
SelectionRelation.new(@relation1, @predicate1). \
should_not == SelectionRelation.new(@relation2, @predicate1)
SelectionRelation.new(@relation1, @predicate1). \
should_not == SelectionRelation.new(@relation1, @predicate2)
end
end
describe '#initialize' do
it "manufactures nested selection relations if multiple predicates are provided" do
SelectionRelation.new(@relation1, @predicate1, @predicate2). \
should == SelectionRelation.new(SelectionRelation.new(@relation1, @predicate2), @predicate1)
end
end
describe '#qualify' do
it "manufactures a selection relation with qualified predicates and qualified relation" do
SelectionRelation.new(@relation1, @predicate1).qualify. \
should == SelectionRelation.new(@relation1.qualify, @predicate1.qualify)
end
end
describe '#to_sql' do
it "manufactures sql with where clause conditions" do
SelectionRelation.new(@relation1, @predicate1).to_sql.to_s.should == SelectBuilder.new do
select do
column :foo, :name
column :foo, :id
end
from :foo
where do
equals do
column :foo, :id
column :bar, :foo_id
end
end
end.to_s
end
end
end
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