spec/evaluator_spec.rb in dentaku-0.2.12 vs spec/evaluator_spec.rb in dentaku-0.2.13

@@ -39,16 +39,22 @@
       expected = token_stream(2, :multiply, 5)
 
       evaluator.evaluate_step(stream, 0, 5, :evaluate_group).should eq(expected)
     end
 
+    it 'supports unary minus' do
+      evaluator.evaluate(token_stream(:subtract, 1)).should eq(-1)
+      evaluator.evaluate(token_stream(1, :subtract, :subtract, 1)).should eq(2)
+    end
+
     describe 'maths' do
       it 'should perform addition' do
         evaluator.evaluate(token_stream(1, :add, 1)).should eq(2)
       end
 
       it 'should respect order of precedence' do
         evaluator.evaluate(token_stream(1, :add, 1, :multiply, 5)).should eq(6)
+        evaluator.evaluate(token_stream(2, :add, 10, :mod, 2)).should eq(2)
       end
 
       it 'should respect explicit grouping' do
         evaluator.evaluate(token_stream(:open, 1, :add, 1, :close, :multiply, 5)).should eq(10)
       end