Add tests for RustOptimize

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

src/bootstrap/config.rs

@@ -875,7 +875,7 @@ fn default() -> StringOrBool {
     }
 }
 
-#[derive(Clone, Debug, Deserialize)]
+#[derive(Clone, Debug, Deserialize, PartialEq, Eq)]
 #[serde(untagged)]
 pub enum RustOptimize {
     #[serde(deserialize_with = "deserialize_and_validate_opt_level")]

src/bootstrap/config/tests.rs

@@ -178,3 +178,22 @@ fn get_toml(file: &Path) -> TomlConfig {
     }
     Config::parse_inner(&["check".to_owned()], get_toml);
 }
+
+#[test]
+fn rust_optimize() {
+    let parse = |s| Config::parse_inner(&["check".to_owned()], |&_| toml::from_str(s).unwrap());
+
+    assert_eq!(parse("").rust_optimize.is_release(), true);
+    assert_eq!(parse("rust.optimize = false").rust_optimize.is_release(), false);
+    assert_eq!(parse("rust.optimize = true").rust_optimize.is_release(), true);
+    assert_eq!(parse("rust.optimize = \"1\"").rust_optimize.get_opt_level(), Some("1".to_string()));
+    assert_eq!(parse("rust.optimize = \"s\"").rust_optimize.get_opt_level(), Some("s".to_string()));
+}
+
+#[test]
+#[should_panic]
+fn invalid_rust_optimize() {
+    Config::parse_inner(&["check".to_owned()], |&_| {
+        toml::from_str("rust.optimize = \"a\"").unwrap()
+    });
+}