Add tests for slice

Author: HyeockJinKim

tests/snippets/slice.py

@@ -0,0 +1,15 @@
+
+a = slice(10)
+assert a.start == None
+assert a.stop == 10
+assert a.step == None
+
+a = slice(0, 10, 1)
+assert a.start == 0
+assert a.stop == 10
+assert a.step == 1
+
+assert slice(10).__repr__() == 'slice(None, 10, None)'
+assert slice(None).__repr__() == 'slice(None, None, None)'
+assert slice(0, 10, 13).__repr__() == 'slice(0, 10, 13)'
+assert slice('0', 1.1, 2+3j).__repr__() == "slice('0', 1.1, (2+3j))"