Address beta warnings

Cargo.toml

@@ -1,4 +1,5 @@
 [workspace]
+resolver = "2"
 
 members = [
  "glean-core",

glean-core/src/database/mod.rs

@@ -1080,7 +1080,7 @@ mod test {
  let metric_id_pattern = "telemetry_test.single_metric";
 
  // Write sample metrics to the database.
- let lifetimes = vec![Lifetime::User, Lifetime::Ping, Lifetime::Application];
+ let lifetimes = [Lifetime::User, Lifetime::Ping, Lifetime::Application];
 
  for lifetime in lifetimes.iter() {
  for value in &["retain", "delete"] {

glean-core/src/event_database/mod.rs

@@ -894,7 +894,7 @@ mod test {
  },
  execution_counter: None,
  };
- let timestamps = vec![20, 40, 200];
+ let timestamps = [20, 40, 200];
  let not_glean_restarted = StoredEvent {
  event: RecordedEvent {
  timestamp: timestamps[0],
@@ -970,8 +970,8 @@ mod test {
 
  // This scenario represents a run of three events followed by an hour between runs,
  // followed by one final event.
- let timestamps = vec![20, 40, 200, 12];
- let ecs = vec![0, 1];
+ let timestamps = [20, 40, 200, 12];
+ let ecs = [0, 1];
  let some_hour = 16;
  let startup_date = FixedOffset::east(0)
  .ymd(2022, 11, 24)
@@ -1095,8 +1095,8 @@ mod test {
 
  // This scenario represents a run of two events followed by negative one hours between runs,
  // followed by two more events.
- let timestamps = vec![20, 40, 12, 200];
- let ecs = vec![0, 1];
+ let timestamps = [20, 40, 12, 200];
+ let ecs = [0, 1];
  let some_hour = 10;
  let startup_date = FixedOffset::east(0)
  .ymd(2022, 11, 25)

glean-core/tests/event.rs

@@ -136,7 +136,7 @@ fn snapshot_correctly_clears_the_stores() {
  let snapshot2 = glean
  .event_storage()
  .snapshot_as_json(&glean, "store2", false);
- for s in vec![snapshot, snapshot2] {
+ for s in [snapshot, snapshot2] {
  assert!(s.is_some());
  let s = s.unwrap();
  assert_eq!(1, s.as_array().unwrap().len());