core: implement display for typed ids

crates/crank-core/src/ids.rs

@@ -1,4 +1,5 @@
 use serde::{Deserialize, Serialize};
+use std::fmt;
 
 macro_rules! define_id {
     ($name:ident) => {
@@ -32,6 +33,12 @@ macro_rules! define_id {
                 self.as_str()
             }
         }
+
+        impl fmt::Display for $name {
+            fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+                formatter.write_str(self.as_str())
+            }
+        }
     };
 }
 
@@ -50,3 +57,16 @@ define_id!(InvocationLogId);
 define_id!(SecretId);
 define_id!(StreamSessionId);
 define_id!(AsyncJobId);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn ids_implement_display() {
+        let workspace_id = WorkspaceId::new("ws_default");
+
+        assert_eq!(workspace_id.to_string(), "ws_default");
+        assert_eq!(format!("{workspace_id}"), "ws_default");
+    }
+}