Add more optimizer tests

Author: antonmedv

optimizer/optimizer_test.go

@@ -34,6 +34,8 @@ func TestOptimize(t *testing.T) {
 		{`sum([a, b])`, 3},
 		{`sum([a, b, c])`, 6},
 		{`sum([a, b, c, 4])`, 10},
+		{`sum(1..10, # * 1000)`, 55000},
+		{`sum(map(1..10, # * 1000), # / 1000)`, float64(55)},
 		{`all(1..3, {# > 0}) && all(1..3, {# < 4})`, true},
 		{`all(1..3, {# > 2}) && all(1..3, {# < 4})`, false},
 		{`all(1..3, {# > 0}) && all(1..3, {# < 2})`, false},