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Diffstat (limited to 'spec/arel/algebra/unit/relations/project_spec.rb')
-rw-r--r-- | spec/arel/algebra/unit/relations/project_spec.rb | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/spec/arel/algebra/unit/relations/project_spec.rb b/spec/arel/algebra/unit/relations/project_spec.rb new file mode 100644 index 0000000000..b71acf5e91 --- /dev/null +++ b/spec/arel/algebra/unit/relations/project_spec.rb @@ -0,0 +1,34 @@ +require File.join(File.dirname(__FILE__), '..', '..', '..', '..', 'spec_helper') + +module Arel + describe Project do + before do + @relation = Table.new(:users) + @attribute = @relation[:id] + end + + describe '#attributes' do + before do + @projection = Project.new(@relation, @attribute) + end + + it "manufactures attributes associated with the projection relation" do + @projection.attributes.should == [@attribute].collect { |a| a.bind(@projection) } + end + end + + describe '#externalizable?' do + describe 'when the projections are attributes' do + it 'returns false' do + Project.new(@relation, @attribute).should_not be_externalizable + end + end + + describe 'when the projections include an aggregation' do + it "obtains" do + Project.new(@relation, @attribute.sum).should be_externalizable + end + end + end + end +end
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