refactor(tvix/*/from_addr): improve test debuggability

If there's an unexpected test failure, print it out, rather than just
saying something is false even though it should be true.

Use .expect() for this, which displays the error if it failed.
We can't use expect_err(), as our stores are not display'able, so use an
assertion with a message there.

Change-Id: I2d88861d979d107edc0717fbdb3cdac9a6bfc5e4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11091
Tested-by: BuildkiteCI
Reviewed-by: Brian Olsen <me@griff.name>
Reviewed-by: flokli <flokli@flokli.de>

tvix/castore/src/blobservice/from_addr.rs

@@ -115,7 +115,11 @@ mod tests {
     /// Correct scheme to connect to localhost over http, but with additional path, which is invalid.
     #[test_case("grpc+http://localhost/some-path", false; "grpc valid invalid host and path")]
     #[tokio::test]
-    async fn test_from_addr_tokio(uri_str: &str, is_ok: bool) {
-        assert_eq!(from_addr(uri_str).await.is_ok(), is_ok)
+    async fn test_from_addr_tokio(uri_str: &str, exp_succeed: bool) {
+        if exp_succeed {
+            from_addr(uri_str).await.expect("should succeed");
+        } else {
+            assert!(from_addr(uri_str).await.is_err(), "should fail");
+        }
     }
 }

tvix/castore/src/directoryservice/from_addr.rs

@@ -114,7 +114,11 @@ mod tests {
     /// Correct scheme to connect to localhost over http, but with additional path, which is invalid.
     #[test_case("grpc+http://localhost/some-path", false; "grpc valid invalid host and path")]
     #[tokio::test]
-    async fn test_from_addr_tokio(uri_str: &str, is_ok: bool) {
-        assert_eq!(from_addr(uri_str).await.is_ok(), is_ok)
+    async fn test_from_addr_tokio(uri_str: &str, exp_succeed: bool) {
+        if exp_succeed {
+            from_addr(uri_str).await.expect("should succeed");
+        } else {
+            assert!(from_addr(uri_str).await.is_err(), "should fail");
+        }
     }
 }

tvix/store/src/pathinfoservice/from_addr.rs

@@ -174,7 +174,7 @@ mod tests {
     /// Correct scheme to connect to localhost over http, but with additional path, which is invalid.
     #[test_case("grpc+http://localhost/some-path", false; "grpc valid invalid host and path")]
     #[tokio::test]
-    async fn test_from_addr_tokio(uri_str: &str, is_ok: bool) {
+    async fn test_from_addr_tokio(uri_str: &str, exp_succeed: bool) {
         let resp = from_addr(
             uri_str,
             gen_blob_service().into(),
@@ -182,6 +182,10 @@ mod tests {
         )
         .await;
 
-        assert_eq!(resp.is_ok(), is_ok);
+        if exp_succeed {
+            resp.expect("should succeed");
+        } else {
+            assert!(resp.is_err(), "should fail");
+        }
     }
 }