unit test for invalid suffix

Author: LukeGrainwalker

test/lang/c/test_lexer.py

@@ -199,6 +199,10 @@ def test_lexical_error(self):
             self.tokenize(src)
         self.assertEqual("Expected '", cm.exception.msg)
 
+    def test_invalid_suffix(self):
+        with self.assertRaises(CompilerError) as cm:
+            self.tokenize("0xe+1")
+
     def test_float_constant(self):
         """ Test floating point constant