From 8ea02d6b890c54cbe2d5e78cefa626bc7d53571a Mon Sep 17 00:00:00 2001
From: Googler <cmita@google.com>
Date: Wed, 5 Aug 2026 03:25:16 -0700
Subject: [PATCH] Fix format string handling for
 collection_subject.contains_none_of.

If a format string was specified it would throw an error due to incorrectly
handling the list type input.

PiperOrigin-RevId: 959549179
---
 lib/private/collection_subject.bzl |  3 ++-
 tests/truth_tests.bzl              | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/private/collection_subject.bzl b/lib/private/collection_subject.bzl
index c804e18..67d7e80 100644
--- a/lib/private/collection_subject.bzl
+++ b/lib/private/collection_subject.bzl
@@ -268,8 +268,9 @@ def _collection_subject_contains_none_of(self, values):
         self: implicitly added
         values: ([`collection`]) values of which none of are allowed to exist.
     """
+    values = to_list(values)
     if self.format:
-        values = self.meta.format_str(values)
+        values = [self.meta.format_str(v) for v in values]
     check_contains_none_of(
         collection = self.actual,
         none_of = values,
diff --git a/tests/truth_tests.bzl b/tests/truth_tests.bzl
index 9b5e654..2984344 100644
--- a/tests/truth_tests.bzl
+++ b/tests/truth_tests.bzl
@@ -90,6 +90,23 @@ def _action_subject_test(env, target):
         msg = "check argv success",
     )
 
+    subject.argv().contains_none_of([
+        "arg1",
+        "arg3",
+        "{bindir}/{package}/input.gen.txt",
+    ])
+    _assert_failure(
+        fake_env,
+        [
+            "expected not to contain any of",
+            "but 2 found",
+            "arg1",
+            "input.gen.txt",
+        ],
+        env = env,
+        msg = "check contains_none_of failure",
+    )
+
     subject.contains_flag_values([
         ("--missingflag", "whatever"),
         ("--arg1flag", "wrongvalue"),