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require File.join(File.dirname(__FILE__), '..', '..', 'spec_helper')
module ActiveRelation
describe Attribute do
before do
@relation1 = Table.new(:foo)
@relation2 = Table.new(:bar)
end
describe '#as' do
it "manufactures an aliased attributed when provided a parameter" do
@relation1[:id].as(:alias).should == Attribute.new(@relation1, :id, :alias)
end
end
describe '#substitute' do
it "manufactures an attribute with the relation substituted" do
@relation1[:id].substitute(@relation2).should == Attribute.new(@relation2, :id)
end
end
describe '#qualified_name' do
it "manufactures an attribute name prefixed with the relation's name" do
@relation1[:id].qualified_name.should == 'foo.id'
end
it "manufactures an attribute name prefixed with the relation's aliased name" do
@relation1.as(:bar)[:id].qualified_name.should == 'bar.id'
end
end
describe '#qualify' do
it "manufactures an attribute aliased with that attributes qualified name" do
@relation1[:id].qualify.should == @relation1[:id].qualify
end
end
describe '==' do
it "obtains if the relation and attribute name are identical" do
Attribute.new(@relation1, :name).should == Attribute.new(@relation1, :name)
Attribute.new(@relation1, :name).should_not == Attribute.new(@relation1, :another_name)
Attribute.new(@relation1, :name).should_not == Attribute.new(@relation2, :name)
end
end
describe 'predications' do
before do
@attribute1 = Attribute.new(@relation1, :name)
@attribute2 = Attribute.new(@relation2, :name)
end
describe '#equals' do
it "manufactures an equality predicate" do
@attribute1.equals(@attribute2).should == Equality.new(@attribute1, @attribute2)
end
end
describe '#less_than' do
it "manufactures a less-than predicate" do
@attribute1.less_than(@attribute2).should == LessThan.new(@attribute1, @attribute2)
end
end
describe '#less_than_or_equal_to' do
it "manufactures a less-than or equal-to predicate" do
@attribute1.less_than_or_equal_to(@attribute2).should == LessThanOrEqualTo.new(@attribute1, @attribute2)
end
end
describe '#greater_than' do
it "manufactures a greater-than predicate" do
@attribute1.greater_than(@attribute2).should == GreaterThan.new(@attribute1, @attribute2)
end
end
describe '#greater_than_or_equal_to' do
it "manufactures a greater-than or equal to predicate" do
@attribute1.greater_than_or_equal_to(@attribute2).should == GreaterThanOrEqualTo.new(@attribute1, @attribute2)
end
end
describe '#matches' do
it "manufactures a match predicate" do
@attribute1.matches(/.*/).should == Match.new(@attribute1, @attribute2)
end
end
end
describe 'aggregations' do
before do
@attribute1 = Attribute.new(@relation1, :name)
end
describe '#count' do
it "manufactures a count aggregation" do
@attribute1.count.should == Aggregation.new(@attribute1, "COUNT")
end
end
describe '#sum' do
it "manufactures a sum aggregation" do
@attribute1.sum.should == Aggregation.new(@attribute1, "SUM")
end
end
describe '#maximum' do
it "manufactures a maximum aggregation" do
@attribute1.maximum.should == Aggregation.new(@attribute1, "MAX")
end
end
describe '#minimum' do
it "manufactures a minimum aggregation" do
@attribute1.minimum.should == Aggregation.new(@attribute1, "MIN")
end
end
describe '#average' do
it "manufactures an average aggregation" do
@attribute1.average.should == Aggregation.new(@attribute1, "AVG")
end
end
end
end
end
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