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Diffstat (limited to 'spec/arel/algebra/unit/relations/table_spec.rb')
-rw-r--r-- | spec/arel/algebra/unit/relations/table_spec.rb | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/spec/arel/algebra/unit/relations/table_spec.rb b/spec/arel/algebra/unit/relations/table_spec.rb new file mode 100644 index 0000000000..4821d92299 --- /dev/null +++ b/spec/arel/algebra/unit/relations/table_spec.rb @@ -0,0 +1,39 @@ +require File.join(File.dirname(__FILE__), '..', '..', '..', '..', 'spec_helper') + +module Arel + describe Table do + before do + @relation = Table.new(:users) + end + + describe '[]' do + describe 'when given a', Symbol do + it "manufactures an attribute if the symbol names an attribute within the relation" do + @relation[:id].should == Attribute.new(@relation, :id) + @relation[:does_not_exist].should be_nil + end + end + + describe 'when given an', Attribute do + it "returns the attribute if the attribute is within the relation" do + @relation[@relation[:id]].should == @relation[:id] + end + + it "returns nil if the attribtue is not within the relation" do + another_relation = Table.new(:photos) + @relation[another_relation[:id]].should be_nil + end + end + + describe 'when given an', Expression do + before do + @expression = @relation[:id].count + end + + it "returns the Expression if the Expression is within the relation" do + @relation[@expression].should be_nil + end + end + end + end +end
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