validate-modules: do not treat falsy non-`False` defaults as `None` (#79267)

* Do not treat falsy non-False defaults as None.

* Fix various instances of this in modules.

* Add changelog fragment.

11 files changed, 22 insertions, 8 deletions

diff --git a/changelogs/fragments/79267-validate-modules-defaults.yml b/changelogs/fragments/79267-validate-modules-defaults.yml
new file mode 100644
index 00000000000..819626b9c4d
--- /dev/null
+++ b/changelogs/fragments/79267-validate-modules-defaults.yml
@@ -0,0 +1,2 @@
+minor_changes:
+  - "ansible-test validate-modules - no longer treat falsy non-``False`` values for defaults as ``None`` (https://github.com/ansible/ansible/pull/79267)."
diff --git a/lib/ansible/modules/dnf.py b/lib/ansible/modules/dnf.py
index ce8c5ea1776..62d1e69d048 100644
--- a/lib/ansible/modules/dnf.py
+++ b/lib/ansible/modules/dnf.py
@@ -28,11 +28,11 @@ options:
         Spaces around the operator are required.
       - You can also pass an absolute path for a binary which is provided by the package to install.
         See examples for more information.
-    required: true
     aliases:
         - pkg
     type: list
     elements: str
+    default: []
 
   list:
     description:
@@ -55,6 +55,7 @@ options:
         When specifying multiple repos, separate them with a ",".
     type: list
     elements: str
+    default: []
 
   disablerepo:
     description:
@@ -63,6 +64,7 @@ options:
         When specifying multiple repos, separate them with a ",".
     type: list
     elements: str
+    default: []
 
   conf_file:
     description:
@@ -108,6 +110,7 @@ options:
     version_added: "2.7"
     type: list
     elements: str
+    default: []
   skip_broken:
     description:
       - Skip all unavailable packages or packages with broken dependencies
@@ -151,12 +154,14 @@ options:
     version_added: "2.7"
     type: list
     elements: str
+    default: []
   disable_plugin:
     description:
       - I(Plugin) name to disable for the install/update operation.
         The disabled plugins will not persist beyond the transaction.
     version_added: "2.7"
     type: list
+    default: []
     elements: str
   disable_excludes:
     description:
diff --git a/lib/ansible/modules/getent.py b/lib/ansible/modules/getent.py
index fdfcf43bf23..dbe87b92cb7 100644
--- a/lib/ansible/modules/getent.py
+++ b/lib/ansible/modules/getent.py
@@ -27,7 +27,6 @@ options:
             - Key from which to return values from the specified database, otherwise the
               full contents are returned.
         type: str
-        default: ''
     service:
         description:
             - Override all databases with the specified service
diff --git a/lib/ansible/modules/iptables.py b/lib/ansible/modules/iptables.py
index c0fdc3ff8c5..34d8df9c824 100644
--- a/lib/ansible/modules/iptables.py
+++ b/lib/ansible/modules/iptables.py
@@ -118,7 +118,6 @@ options:
       - TCP flags specification.
       - C(tcp_flags) expects a dict with the two keys C(flags) and C(flags_set).
     type: dict
-    default: {}
     version_added: "2.4"
     suboptions:
         flags:
@@ -233,6 +232,7 @@ options:
       - It can only be used in conjunction with the protocols tcp, udp, udplite, dccp and sctp.
     type: list
     elements: str
+    default: []
     version_added: "2.11"
   to_ports:
     description:
diff --git a/lib/ansible/modules/replace.py b/lib/ansible/modules/replace.py
index 4b8f74f5620..d8b192663df 100644
--- a/lib/ansible/modules/replace.py
+++ b/lib/ansible/modules/replace.py
@@ -67,6 +67,7 @@ options:
       - If not set, matches are removed entirely.
       - Backreferences can be used ambiguously like C(\1), or explicitly like C(\g<1>).
     type: str
+    default: ''
   after:
     description:
       - If specified, only content after this match will be replaced/removed.
diff --git a/lib/ansible/modules/service.py b/lib/ansible/modules/service.py
index a84829c90e4..69737e020cf 100644
--- a/lib/ansible/modules/service.py
+++ b/lib/ansible/modules/service.py
@@ -76,6 +76,7 @@ options:
         - Additional arguments provided on the command line.
         - While using remote hosts with systemd this setting will be ignored.
         type: str
+        default: ''
         aliases: [ args ]
     use:
         description:
diff --git a/lib/ansible/modules/unarchive.py b/lib/ansible/modules/unarchive.py
index 69e769d05d0..b6fe147c248 100644
--- a/lib/ansible/modules/unarchive.py
+++ b/lib/ansible/modules/unarchive.py
@@ -92,7 +92,7 @@ options:
       - Command-line options with multiple elements must use multiple lines in the array, one for each element.
     type: list
     elements: str
-    default: ""
+    default: []
     version_added: "2.1"
   remote_src:
     description:
diff --git a/lib/ansible/modules/uri.py b/lib/ansible/modules/uri.py
index e67f90a466f..c6c06dd2ad7 100644
--- a/lib/ansible/modules/uri.py
+++ b/lib/ansible/modules/uri.py
@@ -135,6 +135,7 @@ options:
           of C(2.3) supplying C(Content-Type) here will override the header
           generated by supplying C(json) or C(form-urlencoded) for I(body_format).
     type: dict
+    default: {}
     version_added: '2.1'
   validate_certs:
     description:
diff --git a/lib/ansible/modules/yum.py b/lib/ansible/modules/yum.py
index cce8f4cb755..23b18076678 100644
--- a/lib/ansible/modules/yum.py
+++ b/lib/ansible/modules/yum.py
@@ -41,11 +41,13 @@ options:
     aliases: [ pkg ]
     type: list
     elements: str
+    default: []
   exclude:
     description:
       - Package name(s) to exclude when state=present, or latest
     type: list
     elements: str
+    default: []
     version_added: "2.0"
   list:
     description:
@@ -72,6 +74,7 @@ options:
         separated string
     type: list
     elements: str
+    default: []
     version_added: "0.9"
   disablerepo:
     description:
@@ -82,6 +85,7 @@ options:
         separated string
     type: list
     elements: str
+    default: []
     version_added: "0.9"
   conf_file:
     description:
@@ -171,6 +175,7 @@ options:
         The enabled plugin will not persist beyond the transaction.
     type: list
     elements: str
+    default: []
     version_added: "2.5"
   disable_plugin:
     description:
@@ -178,6 +183,7 @@ options:
         The disabled plugins will not persist beyond the transaction.
     type: list
     elements: str
+    default: []
     version_added: "2.5"
   releasever:
     description:
diff --git a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
index 9513ed30b12..ce440bca1f3 100644
--- a/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
+++ b/test/lib/ansible_test/_util/controller/sanity/validate-modules/validate_modules/main.py
@@ -79,7 +79,7 @@ from .module_args import AnsibleModuleImportError, AnsibleModuleNotInitialized,
 
 from .schema import ansible_module_kwargs_schema, doc_schema, return_schema
 
-from .utils import CaptureStd, NoArgsAnsibleModule, compare_unordered_lists, is_empty, parse_yaml, parse_isodate
+from .utils import CaptureStd, NoArgsAnsibleModule, compare_unordered_lists, parse_yaml, parse_isodate
 
 
 if PY3:
@@ -1789,7 +1789,7 @@ class ModuleValidator(Validator):
                     )
 
             arg_default = None
-            if 'default' in data and not is_empty(data['default']):
+            if 'default' in data and data['default'] is not None:
                 try:
                     with CaptureStd():
                         arg_default = _type_checker(data['default'])
@@ -1830,7 +1830,7 @@ class ModuleValidator(Validator):
 
             try:
                 doc_default = None
-                if 'default' in doc_options_arg and not is_empty(doc_options_arg['default']):
+                if 'default' in doc_options_arg and doc_options_arg['default'] is not None:
                     with CaptureStd():
                         doc_default = _type_checker(doc_options_arg['default'])
             except (Exception, SystemExit):
diff --git a/test/sanity/ignore.txt b/test/sanity/ignore.txt
index e9ea871d82f..adebe5f972f 100644
--- a/test/sanity/ignore.txt
+++ b/test/sanity/ignore.txt
@@ -30,7 +30,6 @@ lib/ansible/modules/copy.py pylint:disallowed-name
 lib/ansible/modules/copy.py validate-modules:doc-default-does-not-match-spec
 lib/ansible/modules/copy.py validate-modules:nonexistent-parameter-documented
 lib/ansible/modules/copy.py validate-modules:undocumented-parameter
-lib/ansible/modules/dnf.py validate-modules:doc-required-mismatch
 lib/ansible/modules/dnf.py validate-modules:parameter-invalid
 lib/ansible/modules/file.py validate-modules:undocumented-parameter
 lib/ansible/modules/find.py use-argspec-type-path # fix needed