re-pcre: Add basic tests for module.

re-pcre/test_re.py

@@ -0,0 +1,16 @@
+import re
+
+m = re.search(r"a+", "caaab")
+assert m.group(0) == "aaa"
+
+assert re.match(r"a+", "caaab") is None
+m = re.match(r"a+", "aaaab")
+assert m.group(0) == "aaaa"
+
+assert re.sub("a", "z", "caaab") == "czzzb"
+assert re.sub("a+", "z", "caaab") == "czb"
+
+assert re.sub("a", lambda m: m.group(0) * 2, "caaab") == "caaaaaab"
+
+m = re.match(r"(\d+)\.(\d+)", "24.1632")
+assert m.groups() == ('24', '1632')