Cache configuration documentation

wasmtime-environ/tests/cache_default_config_in_memory.rs

@@ -2,7 +2,7 @@ use wasmtime_environ::cache_init;
 
 #[test]
 fn test_cache_default_config_in_memory() {
-    let errors = cache_init::<&str>(true, None, false, None);
+    let errors = cache_init::<&str>(true, None, None);
     assert!(
         errors.is_empty(),
         "This test loads config from the default location, if there's one. Make sure it's correct!"

wasmtime-environ/tests/cache_disabled.rs

@@ -0,0 +1,7 @@
+use wasmtime_environ::cache_init;
+
+#[test]
+fn test_cache_disabled() {
+    let errors = cache_init::<&str>(false, None, None);
+    assert!(errors.is_empty(), "Failed to disable cache system");
+}

wasmtime-environ/tests/cache_fail_calling_init_twice.rs

@@ -20,7 +20,7 @@ fn test_cache_fail_calling_init_twice() {
     );
     fs::write(&config_path, config_content).expect("Failed to write test config file");
 
-    let errors = cache_init(true, Some(&config_path), false, None);
+    let errors = cache_init(true, Some(&config_path), None);
     assert!(errors.is_empty());
-    let _errors = cache_init(true, Some(&config_path), false, None);
+    let _errors = cache_init(true, Some(&config_path), None);
 }

wasmtime-environ/tests/cache_fail_invalid_config.rs

@@ -18,6 +18,6 @@ fn test_cache_fail_invalid_config() {
     );
     fs::write(&config_path, config_content).expect("Failed to write test config file");
 
-    let errors = cache_init(true, Some(&config_path), false, None);
+    let errors = cache_init(true, Some(&config_path), None);
     assert!(!errors.is_empty());
 }

wasmtime-environ/tests/cache_fail_invalid_path_to_config.rs

@@ -5,6 +5,6 @@ use wasmtime_environ::cache_init;
 fn test_cache_fail_invalid_path_to_config() {
     let dir = tempfile::tempdir().expect("Can't create temporary directory");
     let config_path = dir.path().join("cache-config.toml"); // doesn't exist
-    let errors = cache_init(true, Some(&config_path), false, None);
+    let errors = cache_init(true, Some(&config_path), None);
     assert!(!errors.is_empty());
 }

wasmtime-environ/tests/cache_write_default_config.rs

@@ -1,12 +1,13 @@
 use tempfile;
-use wasmtime_environ::cache_init;
+use wasmtime_environ::cache_create_new_config;
 
 #[test]
 fn test_cache_write_default_config() {
     let dir = tempfile::tempdir().expect("Can't create temporary directory");
     let config_path = dir.path().join("cache-config.toml");
 
-    let errors = cache_init(true, Some(&config_path), true, None);
-    assert!(errors.is_empty());
+    let result = cache_create_new_config(Some(&config_path));
+    assert!(result.is_ok());
     assert!(config_path.exists());
+    assert_eq!(config_path, result.unwrap());
 }