1 files changed, 95 insertions, 0 deletions
diff --git a/spec/arel/unit/relations/table_spec.rb b/spec/arel/unit/relations/table_spec.rb
new file mode 100644
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+++ b/spec/arel/unit/relations/table_spec.rb
@@ -0,0 +1,95 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
+
+module Arel
+  describe Table do
+    before do
+      @relation = Table.new(:users)
+    end
+  
+    describe '[]' do
+      describe 'when given a', Symbol do
+        it "manufactures an attribute if the symbol names an attribute within the relation" do
+          @relation[:id].should == Attribute.new(@relation, :id)
+          @relation[:does_not_exist].should be_nil
+        end
+      end
+
+      describe 'when given an', Attribute do
+        it "returns the attribute if the attribute is within the relation" do
+          @relation[@relation[:id]].should == @relation[:id]
+        end
+        
+        it "returns nil if the attribtue is not within the relation" do
+          another_relation = Table.new(:photos)
+          @relation[another_relation[:id]].should be_nil
+        end
+      end
+      
+      describe 'when given an', Expression do
+        before do
+          @expression = @relation[:id].count
+        end
+        
+        it "returns the Expression if the Expression is within the relation" do
+          @relation[@expression].should be_nil
+        end
+      end
+    end
+    
+    describe '#to_sql' do
+      it "manufactures a simple select query" do
+        @relation.to_sql.should be_like("
+          SELECT `users`.`id`, `users`.`name`
+          FROM `users`
+        ")
+      end
+    end
+    
+    describe '#column_for' do
+      it "returns the column corresponding to the attribute" do
+        @relation.column_for(@relation[:id]).should == @relation.columns.detect { |c| c.name == 'id' }
+      end
+    end
+    
+    describe '#prefix_for' do
+      it "returns the table name if the relation contains the attribute" do
+        @relation.prefix_for(@relation[:id]).should == 'users'
+        @relation.prefix_for(:does_not_exist).should be_nil
+      end
+    end
+    
+    describe '#attributes' do
+      it 'manufactures attributes corresponding to columns in the table' do
+        @relation.attributes.should == [
+          Attribute.new(@relation, :id),
+          Attribute.new(@relation, :name)
+        ]
+      end
+      
+      describe '#reset' do
+        it "reloads columns from the database" do
+          lambda { stub(@relation.engine).columns { [] } }.should_not change { @relation.attributes }
+          lambda { @relation.reset }.should change { @relation.attributes }
+        end
+      end
+    end
+  
+    describe 'hashing' do
+      it "implements hash equality" do
+        Table.new(:users).should hash_the_same_as(Table.new(:users))
+        Table.new(:users).should_not hash_the_same_as(Table.new(:photos))
+      end
+    end
+    
+    describe '#engine' do
+      it "defaults to global engine" do
+        Table.engine = engine = Engine.new
+        Table.new(:users).engine.should == engine
+      end
+      
+      it "can be specified" do
+        Table.new(:users, engine = Engine.new).engine.should == engine
+      end
+    end
+  end
+end
+\ No newline at end of file