add test_save for install config (#28397)

Cargo.lock

@@ -5396,6 +5396,7 @@ dependencies = [
  "lazy_static",
  "nix",
  "reqwest",
+ "scopeguard",
  "semver 1.0.14",
  "serde",
  "serde_yaml 0.9.13",

install/Cargo.toml

@@ -23,6 +23,7 @@ indicatif = "0.17.1"
 lazy_static = "1.4.0"
 nix = "0.25.0"
 reqwest = { version = "0.11.12", default-features = false, features = ["blocking", "brotli", "deflate", "gzip", "rustls-tls", "json"] }
+scopeguard = "1.1.0"
 semver = "1.0.14"
 serde = { version = "1.0.144", features = ["derive"] }
 serde_yaml = "0.9.13"

install/src/config.rs

@@ -86,3 +86,79 @@ impl Config {
         self.releases_dir.join(release_id)
     }
 }
+
+#[cfg(test)]
+mod test {
+    use {
+        super::*,
+        scopeguard::defer,
+        std::{
+            env,
+            fs::{read_to_string, remove_file},
+        },
+    };
+
+    #[test]
+    fn test_save() {
+        let root_dir = env::var("CARGO_MANIFEST_DIR").expect("$CARGO_MANIFEST_DIR");
+        let json_rpc_url = "https://api.mainnet-beta.solana.com";
+        let pubkey = Pubkey::default();
+        let config_name = "config.yaml";
+        let config_path = format!("{}/{}", root_dir, config_name);
+
+        let config = Config::new(&root_dir, json_rpc_url, &pubkey, None);
+
+        assert_eq!(config.save(config_name), Ok(()));
+        defer! {
+            remove_file(&config_path).unwrap();
+        }
+
+        assert_eq!(
+            read_to_string(&config_path).unwrap(),
+            format!(
+                "---
+json_rpc_url: https://api.mainnet-beta.solana.com
+update_manifest_pubkey:
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+- 0
+current_update_manifest: null
+update_poll_secs: 3600
+explicit_release: null
+releases_dir: {}/releases
+active_release_dir: {}/active_release
+",
+                root_dir, root_dir
+            ),
+        );
+    }
+}