Add small random delay in tests

Cargo.lock

@@ -50,11 +50,23 @@ version = "0.2.0"
 dependencies = [
  "proc-macro2",
  "quote",
+ "rand",
  "serde",
  "syn",
  "tokio",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "gimli"
 version = "0.29.0"
@@ -113,6 +125,12 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bda66fc9667c18cb2758a2ac84d1167245054bcf85d5d1aaa6923f45801bdd02"
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.85"
@@ -131,6 +149,36 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.24"
@@ -196,3 +244,9 @@ name = "unicode-ident"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

Cargo.toml

@@ -8,10 +8,11 @@ publish = ["gitea"]
 [dependencies]
 proc-macro2 = "1.0.85"
 quote = "1.0.36"
+rand = "0.8.5"
 serde = { version = "1.0.203", features = ["serde_derive"] }
 syn = "2.0.66"
 # TODO: rt and macros should be removed unless we do tests
-tokio = { version = "1.38.0", features = ["sync", "rt-multi-thread", "macros"] }
+tokio = { version = "1.38.0", features = ["sync", "rt-multi-thread", "macros", "time"] }
 
 [lib]
 proc-macro = true

tests/mod.rs

@@ -45,12 +45,19 @@ async fn main() {
     server.abort();
 }
 
+// Simulates a network delay or some other kind of slow-down in the communication.
+// We don't want it to be too big not to slow down tests unnecessarily.
+async fn random_sleep() {
+    tokio::time::sleep(std::time::Duration::from_millis(rand::random::<u64>() % 20)).await;
+}
+
 async fn server_loop(
     mut qrx: Receiver<(u64, __TestProtocolQuestion)>,
     atx: Sender<(u64, __TestProtocolAnswer)>,
 ) {
     loop {
         if let Some((nonce, q)) = qrx.recv().await {
+            random_sleep().await;
             match q {
                 __TestProtocolQuestion::addition((a, b)) => {
                     atx.send((nonce, __TestProtocolAnswer::addition(a + b)))