officially renamed active_relation to arel

1 files changed, 177 insertions, 0 deletions

diff --git a/spec/arel/unit/primitives/attribute_spec.rb b/spec/arel/unit/primitives/attribute_spec.rb
new file mode 100644
index 0000000000..ac9afa85c7
--- /dev/null
+++ b/spec/arel/unit/primitives/attribute_spec.rb
@@ -0,0 +1,177 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
+
+module Arel
+  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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