alamb commented on code in PR #12086:
URL: https://github.com/apache/datafusion/pull/12086#discussion_r1723924610


##########
datafusion/common-runtime/src/common.rs:
##########
@@ -75,3 +75,56 @@ impl<R: 'static> SpawnedTask<R> {
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use std::{
+        future::{pending, Pending},
+        sync::{Arc, Mutex},
+    };
+
+    use tokio::runtime::Runtime;
+
+    #[tokio::test]
+    #[should_panic(
+        expected = "entered unreachable code: SpawnedTask was cancelled 
unexpectedly"

Review Comment:
   Nice!



##########
datafusion/common-runtime/Cargo.toml:
##########
@@ -37,3 +37,6 @@ path = "src/lib.rs"
 
 [dependencies]
 tokio = { workspace = true }
+
+[dev-dependencies]
+tokio = { version = "1.36", features = ["rt", "rt-multi-thread", "time"] }

Review Comment:
   How about we just add this `rt-multi-thread` feature to the workspace 
dependency here: 
https://github.com/apache/datafusion/blob/e6e1eb229440591263c82bb2b913a4d5a16f9b70/Cargo.toml#L141
   
   (it already gets used a bunch so having different feature flags just means 
the crates end up recompiling a bunch unecessairly during development)
   



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