Limit test threads to 1

Signed-off-by: Alexander Rodin <rodin.alexander@gmail.com>

Author: a-rodin

.circleci/config.yml

@@ -125,7 +125,7 @@ jobs:
             PATH="$HOME/.cargo/bin:/c/Strawberry/perl/bin:/c/Program Files/CMake/bin:$PATH"
             FEATURES="leveldb leveldb/leveldb-sys-3 rdkafka rdkafka/cmake_build"
             rm rust-toolchain
-            cargo test --no-default-features --features "$FEATURES"
+            cargo test --no-default-features --features "$FEATURES" --test-threads=1
 
   test-stable:
     resource_class: xlarge

tests/buffering.rs

@@ -77,7 +77,7 @@ fn test_buffering() {
 
     std::thread::sleep(std::time::Duration::from_millis(100));
 
-    block_on(topology.stop()).unwrap();
+    rt.block_on(topology.stop()).unwrap();
 
     shutdown_on_idle(rt);