Cache worker

wasmtime-environ/tests/cache_default_config_in_memory.rs

@@ -2,6 +2,9 @@ use wasmtime_environ::cache_config;
 
 #[test]
 fn test_cache_default_config_in_memory() {
-    let errors = cache_config::init::<&str>(true, None, false);
-    assert!(errors.is_empty());
+    let errors = cache_config::init::<&str>(true, None, false, None);
+    assert!(
+        errors.is_empty(),
+        "This test loads config from the default location, if there's one. Make sure it's correct!"
+    );
 }