test/interpreter/test_sigma.rb in hilbert-0.0.2700100 vs test/interpreter/test_sigma.rb in hilbert-0.0.2700110

@@ -11,15 +11,21 @@
       '∑[x=0,10] x',
       '55.0'
     )
 
     assert_iq_equal(
+      '∑[i=1, 10] i',
+      '55.0'
+    )
+
+    assert_iq_equal(
       '∑[x=0, 10] x^2',
       '385.0'
     )
 
     assert_iq_equal(
       '∑[x=0, 10] x^3',
       '3025.0'
     )
+
   end
 end