test.rs: #[cfg(test)] a function

This is only used from tests and not exported, so conditionalize it.

Author: allisonkarlitskaya

crates/composefs/src/test.rs

@@ -1,12 +1,8 @@
 //! Tests
 
-use std::{
-    ffi::OsString,
-    fs::{create_dir_all, File},
-    path::PathBuf,
-};
+use std::{ffi::OsString, fs::create_dir_all, path::PathBuf};
 
-use tempfile::{tempfile_in, TempDir};
+use tempfile::TempDir;
 
 use once_cell::sync::Lazy;
 
@@ -31,7 +27,7 @@ pub fn tempdir() -> TempDir {
     TempDir::with_prefix_in("composefs-test-", TMPDIR.as_os_str()).unwrap()
 }
 
-/// Allocate a temporary file
-pub(crate) fn tempfile() -> File {
-    tempfile_in(TMPDIR.as_os_str()).unwrap()
+#[cfg(test)]
+pub(crate) fn tempfile() -> std::fs::File {
+    tempfile::tempfile_in(TMPDIR.as_os_str()).unwrap()
 }