fix issue #109 and #110

issue 109: None not represented round-trippable at top level, reported by
Andrea Censi
issue 110: .replace() on a ScalarString subclass would return a string instead
of an instance of that subclass, reported by sandres23

1 files changed, 42 insertions, 0 deletions

diff --git a/_test/test_none.py b/_test/test_none.py
new file mode 100644
index 0000000..ad51109
--- /dev/null
+++ b/_test/test_none.py
@@ -0,0 +1,42 @@
+# coding: utf-8
+
+
+import pytest    # NOQA
+import ruamel.yaml   # NOQA
+
+
+class TestNone:
+    def test_dump00(self):
+        data = None
+        s = ruamel.yaml.round_trip_dump(data)
+        assert s == 'null\n...\n'
+        d = ruamel.yaml.round_trip_load(s)
+        assert d == data
+
+    def test_dump01(self):
+        data = None
+        s = ruamel.yaml.round_trip_dump(data, explicit_end=True)
+        assert s == 'null\n...\n'
+        d = ruamel.yaml.round_trip_load(s)
+        assert d == data
+
+    def test_dump02(self):
+        data = None
+        s = ruamel.yaml.round_trip_dump(data, explicit_end=False)
+        assert s == 'null\n...\n'
+        d = ruamel.yaml.round_trip_load(s)
+        assert d == data
+
+    def test_dump03(self):
+        data = None
+        s = ruamel.yaml.round_trip_dump(data, explicit_start=True)
+        assert s == '---\n...\n'
+        d = ruamel.yaml.round_trip_load(s)
+        assert d == data
+
+    def test_dump04(self):
+        data = None
+        s = ruamel.yaml.round_trip_dump(data, explicit_start=True, explicit_end=False)
+        assert s == '---\n...\n'
+        d = ruamel.yaml.round_trip_load(s)
+        assert d == data