Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/environ/tests/cache_default_config_in_memory.rs

@@ -0,0 +1,10 @@
+use wasmtime_environ::cache_init;
+
+#[test]
+fn test_cache_default_config_in_memory() {
+    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!"
+    );
+}

crates/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");
+}

crates/environ/tests/cache_fail_calling_init_twice.rs

@@ -0,0 +1,26 @@
+use std::fs;
+use tempfile;
+use wasmtime_environ::cache_init;
+
+#[test]
+#[should_panic]
+fn test_cache_fail_calling_init_twice() {
+    let dir = tempfile::tempdir().expect("Can't create temporary directory");
+    let cache_dir = dir.path().join("cache-dir");
+    let baseline_compression_level = 5;
+
+    let config_path = dir.path().join("cache-config.toml");
+    let config_content = format!(
+        "[cache]\n\
+         enabled = true\n\
+         directory = {}\n\
+         baseline-compression-level = {}\n",
+        toml::to_string_pretty(&format!("{}", cache_dir.display())).unwrap(),
+        baseline_compression_level,
+    );
+    fs::write(&config_path, config_content).expect("Failed to write test config file");
+
+    let errors = cache_init(true, Some(&config_path), None);
+    assert!(errors.is_empty());
+    let _errors = cache_init(true, Some(&config_path), None);
+}

crates/environ/tests/cache_fail_invalid_config.rs

@@ -0,0 +1,23 @@
+use std::fs;
+use tempfile;
+use wasmtime_environ::cache_init;
+
+#[test]
+fn test_cache_fail_invalid_config() {
+    let dir = tempfile::tempdir().expect("Can't create temporary directory");
+    let baseline_compression_level = -4;
+
+    let config_path = dir.path().join("cache-config.toml");
+    let config_content = format!(
+        "[cache]\n\
+         enabled = true\n\
+         directory = {}\n\
+         baseline-compression-level = {}\n",
+        toml::to_string_pretty(&format!("{}", config_path.display())).unwrap(), // directory is a file -- incorrect!
+        baseline_compression_level,
+    );
+    fs::write(&config_path, config_content).expect("Failed to write test config file");
+
+    let errors = cache_init(true, Some(&config_path), None);
+    assert!(!errors.is_empty());
+}

crates/environ/tests/cache_fail_invalid_path_to_config.rs

@@ -0,0 +1,10 @@
+use tempfile;
+use wasmtime_environ::cache_init;
+
+#[test]
+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), None);
+    assert!(!errors.is_empty());
+}

crates/environ/tests/cache_write_default_config.rs

@@ -0,0 +1,13 @@
+use tempfile;
+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 result = cache_create_new_config(Some(&config_path));
+    assert!(result.is_ok());
+    assert!(config_path.exists());
+    assert_eq!(config_path, result.unwrap());
+}