Add tests for integer

Author: HyeockJinKim

tests/snippets/ints.py

@@ -232,3 +232,24 @@ def __int__(self):
 assert_raises(TypeError, lambda: (1).__round__(None))
 assert_raises(TypeError, lambda: (0).__round__(0.0))
 assert_raises(TypeError, lambda: (1).__round__(0.0))
+
+assert 00 == 0
+assert 0_0 == 0
+assert 03.2 == 3.2
+assert 3+02j == 3+2j
+
+# Invalid syntax:
+src = """
+b = 02
+"""
+
+with assert_raises(SyntaxError):
+    exec(src)
+
+# Invalid syntax:
+src = """
+b = 03 + 2j
+"""
+
+with assert_raises(SyntaxError):
+    exec(src)