events: Test new prev_content compat code

crates/ruma-events/tests/compat.rs

@@ -0,0 +1,36 @@
+#![cfg(feature = "compat")]
+
+use matches::assert_matches;
+use ruma_events::room::topic::{TopicEvent, TopicEventContent};
+use serde_json::{from_value as from_json_value, json};
+
+#[test]
+fn deserialize_unsigned_prev_content() {
+    let res = from_json_value::<TopicEvent>(json!({
+        "content": {
+            "topic": "New room topic",
+        },
+        "event_id": "$143273582443PhrSn:example.org",
+        "origin_server_ts": 1432735824653u64,
+        "room_id": "!jEsUZKDJdhlrceRyVU:example.org",
+        "sender": "@example:example.org",
+        "state_key": "",
+        "type": "m.room.topic",
+        "unsigned": {
+            "age": 1234,
+            "prev_content": {
+                "topic": "Old room topic",
+            },
+        },
+    }));
+
+    assert_matches!(
+        res,
+        Ok(TopicEvent {
+            content: TopicEventContent { topic: new_topic, .. },
+            prev_content: Some(TopicEventContent { topic: old_topic, .. }),
+            ..
+        }) if new_topic == "New room topic"
+            && old_topic == "Old room topic"
+    );
+}

xtask/src/ci.rs

@@ -66,7 +66,13 @@ impl CiTask {
         cmd!("rustup run stable cargo check -p ruma-identifiers --no-default-features").run()?;
 
         // 2. Run tests
-        cmd!("rustup run stable cargo test --workspace --features full,unstable-pre-spec").run()
+        let workspace_res =
+            cmd!("rustup run stable cargo test --workspace --features full,unstable-pre-spec")
+                .run();
+        let events_compat_res =
+            cmd!("rustup run stable cargo test -p ruma-events --features compat compat").run();
+
+        workspace_res.and(events_compat_res)
     }
 
     fn build_nightly(&self) -> xshell::Result<()> {