test: add XDG sandboxing and cleanup trap

Set XDG_DATA_HOME and XDG_CONFIG_HOME in the meson test environment so
rmw cannot accidentally read/write the real user's XDG dirs during tests.
Add a trap in test_media_root.sh to clean up /tmp dirs on failure.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: andy5995

test/meson.build

@@ -41,6 +41,8 @@ test_env = [
     'MESON_SOURCE_ROOT=' + meson.project_source_root(),
     'RMW_FAKE_HOME=' + RMW_FAKE_HOME,
     'HOME=' + RMW_FAKE_HOME,
+    'XDG_DATA_HOME=' + RMW_FAKE_HOME + '/.local/share',
+    'XDG_CONFIG_HOME=' + RMW_FAKE_HOME + '/.config',
     'MESON_BUILD_ROOT=' + meson.project_build_root(),
 ]
 

test/test_media_root.sh

@@ -34,6 +34,11 @@ TEST_DIR="/tmp/rmw-media-root-test"
 test_file="media_root_test"
 test_file_path="$TEST_DIR/$test_file"
 
+cleanup() {
+  rm -rf "$TRASH_DIR" "$TEST_DIR"
+}
+trap cleanup EXIT
+
 # Clean up any leftovers from a previous run
 rm -rf "$TRASH_DIR" "$TEST_DIR"
 
@@ -76,8 +81,6 @@ esac
 test -f "$test_file_path"
 test ! -f "$TRASH_DIR/info/$test_file.trashinfo"
 
-# Cleanup
 rm -f "$TEST_CONFIG"
-rm -rf "$TRASH_DIR" "$TEST_DIR"
 
 exit 0