tests/extmod: Move split-on-empty-match tests to a separate test file.

And provide an expected-output file because these tests have a different
behaviour under CPython.

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/extmod/ure_split_empty.py b/tests/extmod/ure_split_empty.py
new file mode 100644
index 0000000000..6f31e6dc6c
--- /dev/null
+++ b/tests/extmod/ure_split_empty.py
@@ -0,0 +1,19 @@
+# test splitting with pattern matches that can be empty
+#
+# CPython 3.5 issues a FutureWarning for these tests because their
+# behaviour will change in a future version.  MicroPython just stops
+# splitting as soon as an empty match is found.
+
+import ure as re
+
+r = re.compile(" *")
+s = r.split("a b    c   foobar")
+print(s)
+
+r = re.compile("x*")
+s = r.split("foo")
+print(s)
+
+r = re.compile("x*")
+s = r.split("axbc")
+print(s)