Fix AnsibleModule.human_to_bytes (#85259)

* Fix AnsibleModule.human_to_bytes.

* Add unit test.

* Fix wrong example in docstring.

* Forgot tests without keyword.

Signed-off-by: Abhijeet Kasurde <Akasurde@redhat.com>

* Apply review suggestions.

* Add type hints.

Co-authored-by: Matt Clay <matt@mystile.com>

---------

Signed-off-by: Abhijeet Kasurde <Akasurde@redhat.com>
Co-authored-by: Matt Clay <matt@mystile.com>

changelogs/fragments/85259-fix-human_to_bytes.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "Fix ``AnsibleModule.human_to_bytes()``, which was never adjusted after the standalone ``human_to_bytes()`` got a new parameter ``default_unit`` (https://github.com/ansible/ansible/pull/85259)."

lib/ansible/module_utils/basic.py

@@ -2149,14 +2149,16 @@ class AnsibleModule(object):
         with open(filename, 'a') as fh:
             fh.write(str)
 
-    def bytes_to_human(self, size):
+    @staticmethod
+    def bytes_to_human(size: int) -> str:
         return bytes_to_human(size)
 
     # for backwards compatibility
     pretty_bytes = bytes_to_human
 
-    def human_to_bytes(self, number, isbits=False):
-        return human_to_bytes(number, isbits)
+    @staticmethod
+    def human_to_bytes(number: str, isbits: bool = False) -> int:
+        return human_to_bytes(number, isbits=isbits)
 
     #
     # Backwards compat

lib/ansible/module_utils/common/text/formatters.py

@@ -60,7 +60,7 @@ def human_to_bytes(number, default_unit=None, isbits=False):
         if 'Mb'/'Kb'/... is passed, the ValueError will be rased.
 
     When isbits is True, converts bits from a human-readable format to integer.
-        example: human_to_bytes('1Mb', isbits=True) returns 8388608 (int) -
+        example: human_to_bytes('1Mb', isbits=True) returns 1048576 (int) -
         string bits representation was passed and return as a number or bits.
         The function expects 'b' (lowercase) as a bit identifier, e.g. 'Mb'/'Kb'/etc.
         if 'MB'/'KB'/... is passed, the ValueError will be rased.

test/units/module_utils/basic/test_human_to_bytes.py

@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+# Copyright: (c) 2025 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import annotations
+
+import pytest
+
+from ansible.module_utils.basic import AnsibleModule
+
+
+@pytest.mark.parametrize('value, isbits, expected', [
+    ("4KB", False, 4096),
+    ("4KB", None, 4096),
+    ("4Kb", True, 4096),
+])
+def test_validator_function(value: str, isbits: bool | None, expected: int) -> None:
+    assert AnsibleModule.human_to_bytes(value, isbits=isbits) == expected
+
+
+@pytest.mark.parametrize('value, expected', [
+    ("4KB", 4096),
+])
+def test_validator_function_default_isbits(value: str, expected: int) -> None:
+    assert AnsibleModule.human_to_bytes(value) == expected
+
+
+@pytest.mark.parametrize('value, isbits', [
+    ("4Kb", False),
+    ("4KB", True),
+])
+def test_validator_functions(value: str, isbits: bool) -> None:
+    with pytest.raises(ValueError):
+        AnsibleModule.human_to_bytes(value, isbits=isbits)