Fix coerce_native

See #344

tests/cli/test_utils.py

@@ -0,0 +1,26 @@
+from hypothesis import given
+from hypothesis.strategies import (
+    binary,
+    booleans,
+    complex_numbers,
+    floats,
+    integers,
+    none,
+    one_of,
+    text
+)
+
+from vdirsyncer.cli.utils import coerce_native
+
+
+@given(one_of(
+    binary(),
+    booleans(),
+    complex_numbers(),
+    floats(),
+    integers(),
+    none(),
+    text()
+))
+def test_coerce_native_fuzzing(s):
+    coerce_native(s)

vdirsyncer/cli/utils.py

@@ -503,7 +503,15 @@ def assert_permissions(path, wanted):
 
 
 def coerce_native(x, encoding='utf-8'):
+    # XXX: Remove with Python 3 only
     try:
-        return to_native(x, encoding)
+        return str(x)
     except UnicodeError:
-        return repr(x)
+        pass
+
+    try:
+        return to_native(x, encoding=encoding)
+    except UnicodeError:
+        pass
+
+    return repr(x)