moved config settings to separate module.

src/main.rs

@@ -1,26 +1,26 @@
-use config::Config;
 use tide::{http::StatusCode, Request, Response};
 
+mod settings;
+
+use settings::Settings;
+
 #[async_std::main]
 async fn main() -> tide::Result<()> {
-    let settings = Config::builder()
-        .set_default("address", "127.0.0.1")?
-        .set_default("port", "9090")?
-        .add_source(
-            config::Environment::with_prefix("MTT")
-                .try_parsing(true)
-                .separator("_")
-                .list_separator(" "),
-        )
-        .build()
-        .unwrap();
+    //let settings = Config::builder()
+    //    .set_default("address", "127.0.0.1")?
+    //    .set_default("port", 9090)?
+    //    .add_source(
+    //        config::Environment::with_prefix("MTT")
+    //            .try_parsing(true)
+    //            .separator("_")
+    //            .list_separator(" "),
+    //    )
+    //    .build()
+    //    .unwrap();
+    let sett = Settings::new().unwrap();
     let app = app_setup().await;
-    app.listen(format!(
-        "{}:{}",
-        settings.get_string("address").unwrap(),
-        settings.get_string("port").unwrap()
-    ))
-    .await?;
+    app.listen(format!("{}:{}", sett.address, sett.port))
+        .await?;
     Ok(())
 }
 
@@ -45,7 +45,7 @@ async fn home(_req: Request<()>) -> tide::Result {
 }
 
 #[cfg(test)]
-mod basic_tests {
+mod server_app {
     use super::*;
     use tide_testing::TideTestingExt;
 

src/settings.rs

@@ -0,0 +1,50 @@
+use config::{Config, ConfigError};
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+//#[allow(unused)]
+pub struct Settings {
+    pub address: String,
+    pub port: u16,
+}
+
+impl Settings {
+    pub fn new() -> Result<Self, ConfigError> {
+        let s = Config::builder()
+            .set_default("port", 9090)?
+            .set_default("address", "127.0.0.1")?
+            .add_source(
+                config::Environment::with_prefix("MTT")
+                    .try_parsing(true)
+                    .separator("_")
+                    .list_separator(" "),
+            )
+            .build()?;
+        s.try_deserialize()
+    }
+}
+
+#[cfg(test)]
+mod settings_tests {
+    use super::*;
+    use serial_test::serial;
+
+    #[test]
+    #[serial]
+    fn defaults() {
+        let set = Settings::new().unwrap();
+        println!("{:?}", set);
+        assert_eq!(set.port, 9090);
+        assert_eq!(set.address, "127.0.0.1");
+    }
+
+    #[test]
+    #[serial]
+    fn port_env() {
+        std::env::set_var("MTT_PORT", "7825");
+        let set = Settings::new().unwrap();
+        println!("{:?}", set);
+        assert_eq!(set.port, 7825);
+        std::env::remove_var("MTT_PORT");
+    }
+}