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require File.join(File.dirname(__FILE__), '..', '..', 'spec_helper')
module ActiveRelation
describe Rename do
before do
@relation1 = Table.new(:users)
@relation2 = Table.new(:photos)
@renamed_relation = Rename.new(@relation1, @relation1[:id] => :schmid)
end
describe '#initialize' do
it "manufactures nested rename relations if multiple renames are provided" do
Rename.new(@relation1, @relation1[:id] => :humpty, @relation1[:name] => :dumpty). \
should == Rename.new(Rename.new(@relation1, @relation1[:name] => :dumpty), @relation1[:id] => :humpty)
end
end
describe '==' do
it "obtains if the relation, attribute, and rename are identical" do
Rename.new(@relation1, @relation1[:id] => :humpty).should == Rename.new(@relation1, @relation1[:id] => :humpty)
Rename.new(@relation1, @relation1[:id] => :humpty).should_not == Rename.new(@relation1, @relation1[:id] => :dumpty)
Rename.new(@relation1, @relation1[:id] => :humpty).should_not == Rename.new(@relation2, @relation2[:id] => :humpty)
end
end
describe '#attributes' do
it "manufactures a list of attributes with the renamed attribute renameed" do
@renamed_relation.attributes.should include(@renamed_relation[:schmid])
@renamed_relation.should have(@relation1.attributes.size).attributes
end
end
describe '[]' do
describe 'when given a', Symbol do
it 'indexes attributes by rename if the symbol names an attribute within the relation' do
@renamed_relation[:id].should be_nil
@renamed_relation[:schmid].should == @relation1[:id].as(:schmid).substitute(@renamed_relation)
@renamed_relation[:does_not_exist].should be_nil
end
end
describe 'when given an', Attribute do
it 'manufactures a substituted and renamed attribute if the attribute is within the relation' do
@renamed_relation[@relation1[:id]].should == @relation1[:id].as(:schmid).substitute(@renamed_relation)
@renamed_relation[@relation1[:name]].should == @relation1[:name].substitute(@renamed_relation)
@renamed_relation[@renamed_relation[:name]].should == @renamed_relation[:name]
@renamed_relation[@relation2[:id]].should be_nil
end
end
describe 'when given an', Expression do
it "manufactures a substituted and renamed expression if the expression is within the relation" do
pending
end
end
describe 'when the rename is constructed with a derived attribute' do
before do
@renamed_renamed_relation = Rename.new(@renamed_relation, @relation1[:id] => :flid)
end
describe 'when given a', Symbol do
it 'manufactures a substituted and renamed attribute if the attribute is within the relation' do
@renamed_renamed_relation[:id].should be_nil
@renamed_renamed_relation[:schmid].should be_nil
@renamed_renamed_relation[:flid].should == @renamed_relation[:schmid].as(:flid).substitute(@renamed_renamed_relation)
end
end
describe 'when given an', Attribute do
it "manufactures a substituted and renamed attribute if the attribute is within the relation -- even if the provided attribute derived" do
@renamed_renamed_relation[@renamed_relation[:schmid]].should == @renamed_relation[:schmid].as(:flid).substitute(@renamed_renamed_relation)
@renamed_renamed_relation[@relation1[:id]].should == @renamed_relation[:schmid].as(:flid).substitute(@renamed_renamed_relation)
end
end
describe 'when given an', Expression do
before do
@expression = @relation1[:id].count
@aggregation = Aggregation.new(@relation1, :expressions => [@expression])
@renamed_relation = Rename.new(@aggregation, @expression => :cnt)
end
it "manufactures a substituted and renamed expression if the expression is within the relation" do
@renamed_relation[@expression].should == @aggregation[@expression].as(:cnt).substitute(@renamed_relation)
end
end
end
end
describe '#qualify' do
it "distributes over the relation and renames" do
Rename.new(@relation1, @relation1[:id] => :schmid).qualify. \
should == Rename.new(@relation1.qualify, @relation1[:id].qualify => :schmid)
end
end
describe '#to_sql' do
it 'manufactures sql renaming the attribute' do
@renamed_relation.to_sql.should be_like("""
SELECT `users`.`id` AS 'schmid', `users`.`name`
FROM `users`
""")
end
end
end
end
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