Added unit test for splitdown function.

All tests pass for py26, py27 and py36.

petl/test/transform/test_regex.py

@@ -6,7 +6,7 @@
 
 
 from petl.test.helpers import ieq, eq_
-from petl.transform.regex import capture, split, search, searchcomplement
+from petl.transform.regex import capture, split, search, searchcomplement, splitdown
 from petl.transform.basics import TransformError
 
 
@@ -245,4 +245,35 @@ def test_search_unicode():
     ieq(expect, actual)
 
 
+def test_splitdown():
+
+    tbl = ((u'name', u'roles'),
+           (u'Jane Doe', u'president,engineer,tailor,lawyer'),
+           (u'John Doe', u'rocket scientist,optometrist,chef,knight,sailor'))
+
+    actual = splitdown(tbl, 'roles', ',')
+    expect = ((u'name', u'roles'),
+              (u'Jane Doe', u'president'),
+              (u'Jane Doe', u'engineer'),
+              (u'Jane Doe', u'tailor'),
+              (u'Jane Doe', u'lawyer'),
+              (u'John Doe', u'rocket scientist'),
+              (u'John Doe', u'optometrist'),
+              (u'John Doe', u'chef'),
+              (u'John Doe', u'knight'),
+              (u'John Doe', u'sailor'))
+
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+    ieq(expect, actual)
+
+
 # TODO test sub()
+