1 files changed, 41 insertions, 0 deletions
diff --git a/test/lib/ansible_test/_internal/encoding.py b/test/lib/ansible_test/_internal/encoding.py
new file mode 100644
index 00000000..8e014794
--- /dev/null
+++ b/test/lib/ansible_test/_internal/encoding.py
@@ -0,0 +1,41 @@
+"""Functions for encoding and decoding strings."""
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+from . import types as t
+
+ENCODING = 'utf-8'
+
+Text = type(u'')
+
+
+def to_optional_bytes(value, errors='strict'):  # type: (t.Optional[t.AnyStr], str) -> t.Optional[bytes]
+    """Return the given value as bytes encoded using UTF-8 if not already bytes, or None if the value is None."""
+    return None if value is None else to_bytes(value, errors)
+
+
+def to_optional_text(value, errors='strict'):  # type: (t.Optional[t.AnyStr], str) -> t.Optional[t.Text]
+    """Return the given value as text decoded using UTF-8 if not already text, or None if the value is None."""
+    return None if value is None else to_text(value, errors)
+
+
+def to_bytes(value, errors='strict'):  # type: (t.AnyStr, str) -> bytes
+    """Return the given value as bytes encoded using UTF-8 if not already bytes."""
+    if isinstance(value, bytes):
+        return value
+
+    if isinstance(value, Text):
+        return value.encode(ENCODING, errors)
+
+    raise Exception('value is not bytes or text: %s' % type(value))
+
+
+def to_text(value, errors='strict'):  # type: (t.AnyStr, str) -> t.Text
+    """Return the given value as text decoded using UTF-8 if not already text."""
+    if isinstance(value, bytes):
+        return value.decode(ENCODING, errors)
+
+    if isinstance(value, Text):
+        return value
+
+    raise Exception('value is not bytes or text: %s' % type(value))