tests: Add tests for ure groups and named char classes.

Issue #1122 should now be fixed.

tests/extmod/ure_group.py

@@ -0,0 +1,22 @@
+# test groups, and nested groups
+
+try:
+    import ure as re
+except:
+    import re
+
+def print_groups(match):
+    print('----')
+    try:
+        i = 0
+        while True:
+            print(m.group(i))
+            i += 1
+    except IndexError:
+        pass
+
+m = re.match(r'(([0-9]*)([a-z]*)[0-9]*)','1234hello567')
+print_groups(m)
+
+m = re.match(r'([0-9]*)(([a-z]*)([0-9]*))','1234hello567')
+print_groups(m)

tests/extmod/ure_namedclass.py

@@ -0,0 +1,28 @@
+# test named char classes
+
+try:
+    import ure as re
+except:
+    import re
+
+def print_groups(match):
+    print('----')
+    try:
+        i = 0
+        while True:
+            print(m.group(i))
+            i += 1
+    except IndexError:
+        pass
+
+m = re.match(r'\w+','1234hello567 abc')
+print_groups(m)
+
+m = re.match(r'(\w+)\s+(\w+)','ABC \t1234hello567 abc')
+print_groups(m)
+
+m = re.match(r'(\S+)\s+(\D+)','ABC \thello abc567 abc')
+print_groups(m)
+
+m = re.match(r'(([0-9]*)([a-z]*)\d*)','1234hello567')
+print_groups(m)

tests/extmod/ure_split.py

@@ -31,5 +31,4 @@ print(s)
 
 r = re.compile("[a-f]+")
 s = r.split("0a3b9")
-# TODO - char classes are not yet supported by re1.5
-#print(s)
+print(s)