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require File.join(File.dirname(__FILE__), '..', '..', 'spec_helper')
module ActiveRelation
describe Relation do
before do
@relation1 = Table.new(:foo)
@relation2 = Table.new(:bar)
@attribute1 = Attribute.new(@relation1, :id)
@attribute2 = Attribute.new(@relation1, :name)
end
describe '[]' do
it "manufactures an attribute when given a symbol" do
@relation1[:id].should == Attribute.new(@relation1, :id)
end
it "manufactures a range relation when given a range" do
@relation1[1..2].should == Range.new(@relation1, 1..2)
end
end
describe '#include?' do
it "manufactures an inclusion predicate" do
@relation1.include?(@attribute1).should be_kind_of(RelationInclusion)
end
end
describe 'read operations' do
describe 'joins' do
before do
@predicate = @relation1[:id].equals(@relation2[:id])
end
describe '#join' do
it "manufactures an inner join operation between those two relations" do
@relation1.join(@relation2).on(@predicate).should == Join.new("INNER JOIN", @relation1, @relation2, @predicate)
end
end
describe '#outer_join' do
it "manufactures a left outer join operation between those two relations" do
@relation1.outer_join(@relation2).on(@predicate).should == Join.new("LEFT OUTER JOIN", @relation1, @relation2, @predicate)
end
end
end
describe '#project' do
it "collapses identical projections" do
pending
end
it "manufactures a projection relation" do
@relation1.project(@attribute1, @attribute2).should == Projection.new(@relation1, @attribute1, @attribute2)
end
end
describe '#as' do
it "manufactures an alias relation" do
@relation1.as(:thucydides).should == Alias.new(@relation1, :thucydides)
end
end
describe '#rename' do
it "manufactures a rename relation" do
@relation1.rename(@attribute1, :foo).should == Rename.new(@relation1, @attribute1 => :foo)
end
end
describe '#select' do
before do
@predicate = Equality.new(@attribute1, @attribute2)
end
it "manufactures a selection relation" do
@relation1.select(@predicate).should == Selection.new(@relation1, @predicate)
end
it "accepts arbitrary strings" do
@relation1.select("arbitrary").should == Selection.new(@relation1, "arbitrary")
end
end
describe '#order' do
it "manufactures an order relation" do
@relation1.order(@attribute1, @attribute2).should be_kind_of(Order)
end
end
end
describe 'write operations' do
describe '#delete' do
it 'manufactures a deletion relation' do
@relation1.delete.should be_kind_of(Deletion)
end
end
describe '#insert' do
it 'manufactures an insertion relation' do
@relation1.insert(record = {:id => 1}).should be_kind_of(Insertion)
end
end
end
end
end
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