Add regression test for #1503.

Closes #1503.

core/lib/Cargo.toml

@@ -41,7 +41,7 @@ atomic = "0.5"
 parking_lot = "0.11"
 ubyte = {version = "0.10", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
-figment = { version = "0.10", features = ["toml", "env"] }
+figment = { version = "0.10.2", features = ["toml", "env"] }
 rand = "0.7"
 either = "1"
 

core/lib/tests/tls-config-from-source-1503.rs

@@ -0,0 +1,24 @@
+macro_rules! crate_relative {
+    ($path:expr) => {
+        std::path::Path::new(concat!(env!("CARGO_MANIFEST_DIR"), "/", $path))
+    };
+}
+
+#[test]
+fn tls_config_from_soruce() {
+    use rocket::config::{Config, TlsConfig};
+    use rocket::figment::Figment;
+
+    let cert_path = crate_relative!("examples/tls/private/cert.pem");
+    let key_path = crate_relative!("examples/tls/private/key.pem");
+
+    let rocket_config = Config {
+        tls: Some(TlsConfig::from_paths(cert_path, key_path)),
+        ..Default::default()
+    };
+
+    let config: Config = Figment::from(rocket_config).extract().unwrap();
+    let tls = config.tls.expect("have TLS config");
+    assert_eq!(tls.certs().unwrap_left(), cert_path);
+    assert_eq!(tls.key().unwrap_left(), key_path);
+}