reorganizing tests

1 files changed, 188 insertions, 0 deletions

diff --git a/spec/arel/algebra/unit/relations/relation_spec.rb b/spec/arel/algebra/unit/relations/relation_spec.rb
new file mode 100644
index 0000000000..3286f373f5
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+++ b/spec/arel/algebra/unit/relations/relation_spec.rb
@@ -0,0 +1,188 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', '..', 'spec_helper')
+
+module Arel
+  describe Relation do
+    before do
+      @relation = Table.new(:users)
+      @attribute1 = @relation[:id]
+      @attribute2 = @relation[:name]
+    end
+  
+    describe '[]' do
+      describe 'when given an', Attribute do
+        it "return the attribute congruent to the provided attribute" do
+          @relation[@attribute1].should == @attribute1
+        end
+      end
+      
+      describe 'when given a', Symbol, String do
+        it "returns the attribute with the same name, if it exists" do
+          @relation[:id].should == @attribute1
+          @relation['id'].should == @attribute1
+          @relation[:does_not_exist].should be_nil
+        end
+      end
+    end
+      
+    describe Relation::Operable do
+      describe 'joins' do
+        before do
+          @predicate = @relation[:id].eq(@relation[:id])
+        end
+      
+        describe '#join' do
+          describe 'when given a relation' do
+            it "manufactures an inner join operation between those two relations" do
+              @relation.join(@relation).on(@predicate). \
+                should == InnerJoin.new(@relation, @relation, @predicate)
+            end
+          end
+          
+          describe "when given a string" do
+            it "manufactures a join operation with the string passed through" do
+              @relation.join(arbitrary_string = "ASDF").should == Join.new(arbitrary_string, @relation) 
+            end
+          end
+          
+          describe "when given something blank" do
+            it "returns self" do
+              @relation.join.should == @relation
+            end
+          end
+        end
+
+        describe '#outer_join' do
+          it "manufactures a left outer join operation between those two relations" do
+            @relation.outer_join(@relation).on(@predicate). \
+              should == OuterJoin.new(@relation, @relation, @predicate)
+          end
+        end
+      end
+
+      describe '#project' do
+        it "manufactures a projection relation" do
+          @relation.project(@attribute1, @attribute2). \
+            should == Project.new(@relation, @attribute1, @attribute2)
+        end
+        
+        describe "when given blank attributes" do
+          it "returns self" do
+            @relation.project.should == @relation
+          end
+        end
+      end
+
+      describe '#alias' do
+        it "manufactures an alias relation" do
+          @relation.alias.relation.should == Alias.new(@relation).relation
+        end
+      end
+
+      describe '#where' do
+        before do
+          @predicate = Equality.new(@attribute1, @attribute2)
+        end
+
+        it "manufactures a where relation" do
+          @relation.where(@predicate).should == Where.new(@relation, @predicate)
+        end
+
+        it "accepts arbitrary strings" do
+          @relation.where("arbitrary").should == Where.new(@relation, "arbitrary")
+        end
+
+        describe 'when given a blank predicate' do
+          it 'returns self' do
+            @relation.where.should == @relation
+          end
+        end
+      end
+  
+      describe '#order' do
+        it "manufactures an order relation" do
+          @relation.order(@attribute1, @attribute2).should == Order.new(@relation, @attribute1, @attribute2)
+        end
+        
+        describe 'when given a blank ordering' do
+          it 'returns self' do
+            @relation.order.should == @relation
+          end
+        end
+      end
+      
+      describe '#take' do
+        it "manufactures a take relation" do
+          @relation.take(5).should == Take.new(@relation, 5)
+        end
+        
+        describe 'when given a blank number of items' do
+          it 'returns self' do
+            @relation.take.should == @relation
+          end
+        end
+      end
+      
+      describe '#skip' do
+        it "manufactures a skip relation" do
+          @relation.skip(4).should == Skip.new(@relation, 4)
+        end
+        
+        describe 'when given a blank number of items' do
+          it 'returns self' do
+            @relation.skip.should == @relation
+          end
+        end
+      end
+
+      describe '#group' do
+        it 'manufactures a group relation' do
+          @relation.group(@attribute1, @attribute2).should == Group.new(@relation, @attribute1, @attribute2)
+        end
+        
+        describe 'when given blank groupings' do
+          it 'returns self' do
+            @relation.group.should == @relation
+          end
+        end
+      end
+      
+      describe Relation::Operable::Writable do
+        describe '#delete' do
+          it 'manufactures a deletion relation' do
+            Session.start do
+              mock(Session.new).delete(Deletion.new(@relation))
+              @relation.delete
+            end
+          end
+        end
+
+        describe '#insert' do
+          it 'manufactures an insertion relation' do
+            Session.start do
+              record = {@relation[:name] => 'carl'}
+              mock(Session.new).create(Insert.new(@relation, record))
+              @relation.insert(record)
+            end
+          end
+        end
+
+        describe '#update' do
+          it 'manufactures an update relation' do
+            Session.start do
+              assignments = {@relation[:name] => Value.new('bob', @relation)}
+              mock(Session.new).update(Update.new(@relation, assignments))
+              @relation.update(assignments)
+            end
+          end
+        end
+      end
+    end
+      
+    describe Relation::Enumerable do
+      it "implements enumerable" do
+        @relation.collect.should == @relation.session.read(@relation)
+        @relation.first.should == @relation.session.read(@relation).first
+      end
+    end
+  end
+end
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