Added some defaults when there are no deliverables.

app/models/budget.rb

@@ -34,7 +34,7 @@ class Budget
   end
   
   def budget
-    return self.deliverables.collect(&:budget).inject { |sum, n| sum + n}
+    return self.deliverables.collect(&:budget).inject { |sum, n| sum + n} || 0.0
   end
   
   def budget_ratio
@@ -42,7 +42,7 @@ class Budget
   end
   
   def spent
-    self.deliverables.collect(&:spent).inject { |sum, n| sum + n }
+    self.deliverables.collect(&:spent).inject { |sum, n| sum + n } || 0.0
   end
   
   def left

spec/models/budget_spec.rb

@@ -200,6 +200,17 @@ describe Budget,'.budget' do
     @budget = Budget.new(@project.id)  
     @budget.budget.should eql(5000.0)
   end
+
+  it 'should be 0 if there are no deliverables' do
+    Deliverable.stub!(:find_all_by_project_id).and_return([])
+    
+    @project = mock_model(Project)
+    Project.stub!(:find).with(@project.id).and_return(@project)
+    
+    @budget = Budget.new(@project.id)
+
+    @budget.budget.should eql(0.0)    
+  end
 end
 
 describe Budget,'.budget_ratio' do
@@ -277,4 +288,15 @@ describe Budget, '.spent' do
 
     @budget.spent.should eql(1500.0)
   end
+  
+  it 'should be 0 if there are no deliverables' do
+    Deliverable.stub!(:find_all_by_project_id).and_return([])
+    
+    @project = mock_model(Project)
+    Project.stub!(:find).with(@project.id).and_return(@project)
+    
+    @budget = Budget.new(@project.id)
+
+    @budget.spent.should eql(0.0)    
+  end
 end