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require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
module ActiveRelation
describe Attribute do
before do
@relation = Table.new(:users)
@attribute = Attribute.new(@relation, :id)
end
describe Attribute::Transformations do
describe '#as' do
it "manufactures an aliased attributed" do
@attribute.as(:alias).should == Attribute.new(@relation, @attribute.name, :alias => :alias, :ancestor => @attribute)
end
end
describe '#bind' do
it "manufactures an attribute with the relation bound and self as an ancestor" do
derived_relation = @relation.select(@relation[:id].eq(1))
@attribute.bind(derived_relation).should == Attribute.new(derived_relation, @attribute.name, :ancestor => @attribute)
end
it "returns self if the substituting to the same relation" do
@attribute.bind(@relation).should == @attribute
end
end
describe '#to_attribute' do
it "returns self" do
@attribute.to_attribute.should == @attribute
end
end
end
describe '#column' do
it "returns the corresponding column in the relation" do
@attribute.column.should == @relation.column_for(@attribute)
end
end
describe '#qualified_name' do
it "manufactures an attribute name prefixed with the relation's name" do
@attribute.qualified_name.should == "#{@relation.prefix_for(@attribute)}.id"
end
end
describe '#engine' do
it "delegates to its relation" do
Attribute.new(@relation, :id).engine.should == @relation.engine
end
end
describe Attribute::Congruence do
describe '=~' do
it "obtains if the attributes are identical" do
Attribute.new(@relation, :name).should =~ Attribute.new(@relation, :name)
end
it "obtains if the attributes have an overlapping history" do
Attribute.new(@relation, :name, :ancestor => Attribute.new(@relation, :name)).should =~ Attribute.new(@relation, :name)
Attribute.new(@relation, :name).should =~ Attribute.new(@relation, :name, :ancestor => Attribute.new(@relation, :name))
end
end
describe 'hashing' do
it "implements hash equality" do
Attribute.new(@relation, 'name').should hash_the_same_as(Attribute.new(@relation, 'name'))
Attribute.new(@relation, 'name').should_not hash_the_same_as(Attribute.new(@relation, 'id'))
end
end
end
describe '#to_sql' do
describe 'for a simple attribute' do
it "manufactures sql with an alias" do
@attribute.to_sql.should be_like("`users`.`id`")
end
end
describe 'for an attribute in a join relation where the source relation is aliased' do
before do
another_relation = Table.new(:photos)
@join_with_alias = @relation.as(:alias).join(another_relation).on(@relation[:id].eq(another_relation[:user_id]))
end
it "manufactures sql with an alias" do
@join_with_alias[@attribute].to_sql.should be_like("`alias`.`id`")
end
end
end
describe Attribute::Predications do
before do
@attribute = Attribute.new(@relation, :name)
end
describe '#eq' do
it "manufactures an equality predicate" do
@attribute.eq('name').should == Equality.new(@attribute, 'name')
end
end
describe '#lt' do
it "manufactures a less-than predicate" do
@attribute.lt(10).should == LessThan.new(@attribute, 10)
end
end
describe '#lteq' do
it "manufactures a less-than or equal-to predicate" do
@attribute.lteq(10).should == LessThanOrEqualTo.new(@attribute, 10)
end
end
describe '#gt' do
it "manufactures a greater-than predicate" do
@attribute.gt(10).should == GreaterThan.new(@attribute, 10)
end
end
describe '#gteq' do
it "manufactures a greater-than or equal-to predicate" do
@attribute.gteq(10).should == GreaterThanOrEqualTo.new(@attribute, 10)
end
end
describe '#matches' do
it "manufactures a match predicate" do
@attribute.matches(/.*/).should == Match.new(@attribute, /.*/)
end
end
describe '#in' do
it "manufactures an in predicate" do
@attribute.in(1..30).should == In.new(@attribute, (1..30))
end
end
end
describe Attribute::Expressions do
before do
@attribute = Attribute.new(@relation, :name)
end
describe '#count' do
it "manufactures a count Expression" do
@attribute.count.should == Expression.new(@attribute, "COUNT")
end
end
describe '#sum' do
it "manufactures a sum Expression" do
@attribute.sum.should == Expression.new(@attribute, "SUM")
end
end
describe '#maximum' do
it "manufactures a maximum Expression" do
@attribute.maximum.should == Expression.new(@attribute, "MAX")
end
end
describe '#minimum' do
it "manufactures a minimum Expression" do
@attribute.minimum.should == Expression.new(@attribute, "MIN")
end
end
describe '#average' do
it "manufactures an average Expression" do
@attribute.average.should == Expression.new(@attribute, "AVG")
end
end
end
end
end
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