tests/basics: Add tests for raising ValueError when range() gets 0 step.

tests/basics/builtin_range.py

@@ -34,6 +34,12 @@ print(range(1, 4)[1:])
 print(range(1, 4)[:-1])
 print(range(7, -2, -4)[:])
 
+# zero step
+try:
+    range(1, 2, 0)
+except ValueError:
+    print("ValueError")
+
 # bad unary op
 try:
     -range(1)

tests/basics/for_range.py

@@ -6,6 +6,13 @@ for x in range(*(1, 3)):
 for x in range(1, *(6, 2)):
     print(x)
 
+# zero step
+try:
+    for x in range(1, 2, 0):
+        pass
+except ValueError:
+    print('ValueError')
+
 # apply args using **
 try:
     for x in range(**{'end':1}):