task(tests): introduce prebuilt mocks and mocking helpers

crates/matrix-sdk-common/src/deserialized_responses.rs

@@ -343,7 +343,7 @@ impl SyncTimelineEvent {
     /// Get the event id of this `SyncTimelineEvent` if the event has any valid
     /// id.
     pub fn event_id(&self) -> Option<OwnedEventId> {
-        self.kind.raw().get_field::<OwnedEventId>("event_id").ok().flatten()
+        self.kind.event_id()
     }
 
     /// Returns a reference to the (potentially decrypted) Matrix event inside
@@ -529,6 +529,12 @@ impl TimelineEventKind {
         }
     }
 
+    /// Get the event id of this `TimelineEventKind` if the event has any valid
+    /// id.
+    pub fn event_id(&self) -> Option<OwnedEventId> {
+        self.raw().get_field::<OwnedEventId>("event_id").ok().flatten()
+    }
+
     /// If the event was a decrypted event that was successfully decrypted, get
     /// its encryption info. Otherwise, `None`.
     pub fn encryption_info(&self) -> Option<&EncryptionInfo> {

crates/matrix-sdk/src/test_utils.rs

@@ -14,6 +14,9 @@ use url::Url;
 
 pub mod events;
 
+#[cfg(not(target_arch = "wasm32"))]
+pub mod mocks;
+
 use crate::{
     config::RequestConfig,
     matrix_auth::{MatrixSession, MatrixSessionTokens},