shaping: validate the default shaping.toml file

We used to do this as part of a more structured test, but decoupled
that from the test case outcome in 899178351a.

This commit explicitly loads the default file to make sure that it
is valid.

assets/policy-extras/shaping.toml

@@ -90,8 +90,7 @@ duration = "30 days"
 match=[
         {MXSuffix=".google.com"},
         {MXSuffix=".googlemail.com"}
-        ]
-
+]
 max_deliveries_per_connection = 50
 provider_connection_limit = 5
 consecutive_connection_failures_before_delay = 5

crates/kumo-api-types/src/shaping.rs

@@ -1917,4 +1917,11 @@ MergedEntry {
 "#
         );
     }
+
+    #[tokio::test]
+    async fn test_load_default_shaping_toml() {
+        Shaping::merge_files(&["../../assets/policy-extras/shaping.toml".into()])
+            .await
+            .unwrap();
+    }
 }