Add test which unsets RUNFILES env vars

Author: mering

tests/runfiles/BUILD.bazel

@@ -1,6 +1,7 @@
 load("@bazel_skylib//rules:build_test.bzl", "build_test")
 load("@rules_python//python:py_test.bzl", "py_test")
 load("@rules_python//python/private:bzlmod_enabled.bzl", "BZLMOD_ENABLED")  # buildifier: disable=bzl-visibility
+load("//tests/support:sh_py_run_test.bzl", "sh_py_run_test")
 
 py_test(
     name = "runfiles_test",
@@ -11,6 +12,14 @@ py_test(
     deps = ["//python/runfiles"],
 )
 
+sh_py_run_test(
+    name = "run_binary_with_runfiles_test",
+    build_python_zip = "no",
+    py_src = "bin_with_runfiles_test.py",
+    sh_src = "run_binary_with_runfiles_test.sh",
+    deps = ["//python/runfiles"],
+)
+
 build_test(
     name = "publishing",
     targets = [

tests/runfiles/bin_with_runfiles_test.py

@@ -0,0 +1,32 @@
+# Copyright 2018 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import unittest
+
+from python.runfiles import runfiles
+
+
+class RunfilesTest(unittest.TestCase):
+    """Unit tests for `rules_python.python.runfiles.Runfiles`."""
+
+    def testCreatesDirectoryBasedRunfiles(self) -> None:
+        r = runfiles.Create()
+        repo = r.CurrentRepository() or "_main"
+        bin_location = r.Rlocation(os.path.join(repo,"tests/runfiles/bin_with_runfiles_test.py"))
+        self.maxDiff = None
+        self.assertEqual(bin_location, __file__)
+
+if __name__ == "__main__":
+    unittest.main()

tests/runfiles/run_binary_with_runfiles_test.sh

@@ -0,0 +1,39 @@
+# Copyright 2024 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# --- begin runfiles.bash initialization v3 ---
+# Copy-pasted from the Bazel Bash runfiles library v3.
+set -uo pipefail; set +e; f=bazel_tools/tools/bash/runfiles/runfiles.bash
+source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$0.runfiles/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e
+# --- end runfiles.bash initialization v3 ---
+set +e
+
+bin=$(rlocation $BIN_RLOCATION)
+if [[ -z "$bin" ]]; then
+  echo "Unable to locate test binary: $BIN_RLOCATION"
+  exit 1
+fi
+
+# Test invocation without RUNFILES environment variables set
+unset RUNFILES_MANIFEST_FILE
+unset RUNFILES_DIR
+
+# Fail if tests fail
+set -e
+${bin}