1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/rust/glean-core/tests/uuid.rs b/third_party/rust/glean-core/tests/uuid.rs
new file mode 100644
index 0000000000..c9d5015a72
--- /dev/null
+++ b/third_party/rust/glean-core/tests/uuid.rs
@@ -0,0 +1,114 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+mod common;
+use crate::common::*;
+
+use serde_json::json;
+
+use glean_core::metrics::*;
+use glean_core::storage::StorageManager;
+use glean_core::{CommonMetricData, Lifetime};
+
+#[test]
+fn uuid_is_generated_and_stored() {
+    let (mut glean, _t) = new_glean(None);
+
+    let uuid: UuidMetric = UuidMetric::new(CommonMetricData {
+        name: "uuid".into(),
+        category: "local".into(),
+        send_in_pings: vec!["core".into()],
+        ..Default::default()
+    });
+
+    uuid.generate_and_set_sync(&glean);
+    let snapshot = glean.snapshot("core", false);
+    assert!(
+        snapshot.contains(r#""local.uuid": ""#),
+        "Snapshot 1: {snapshot}"
+    );
+
+    uuid.generate_and_set_sync(&glean);
+    let snapshot = glean.snapshot("core", false);
+    assert!(
+        snapshot.contains(r#""local.uuid": ""#),
+        "Snapshot 2: {snapshot}"
+    );
+}
+
+#[test]
+fn uuid_serializer_should_correctly_serialize_uuids() {
+    let value = uuid::Uuid::new_v4();
+
+    let (mut tempdir, _) = tempdir();
+
+    {
+        // We give tempdir to the `new_glean` function...
+        let (glean, dir) = new_glean(Some(tempdir));
+        // And then we get it back once that function returns.
+        tempdir = dir;
+
+        let metric = UuidMetric::new(CommonMetricData {
+            name: "uuid_metric".into(),
+            category: "telemetry".into(),
+            send_in_pings: vec!["store1".into()],
+            disabled: false,
+            lifetime: Lifetime::User,
+            ..Default::default()
+        });
+
+        metric.set_from_uuid_sync(&glean, value);
+
+        let snapshot = StorageManager
+            .snapshot_as_json(glean.storage(), "store1", true)
+            .unwrap();
+        assert_eq!(
+            json!({"uuid": {"telemetry.uuid_metric": value.to_string()}}),
+            snapshot
+        );
+    }
+
+    // Make a new Glean instance here, which should force reloading of the data from disk
+    // so we can ensure it persisted, because it has User lifetime
+    {
+        let (glean, _t) = new_glean(Some(tempdir));
+        let snapshot = StorageManager
+            .snapshot_as_json(glean.storage(), "store1", true)
+            .unwrap();
+        assert_eq!(
+            json!({"uuid": {"telemetry.uuid_metric": value.to_string()}}),
+            snapshot
+        );
+    }
+}
+
+#[test]
+fn set_properly_sets_the_value_in_all_stores() {
+    let (glean, _t) = new_glean(None);
+    let store_names: Vec<String> = vec!["store1".into(), "store2".into()];
+    let value = uuid::Uuid::new_v4();
+
+    let metric = UuidMetric::new(CommonMetricData {
+        name: "uuid_metric".into(),
+        category: "telemetry".into(),
+        send_in_pings: store_names.clone(),
+        disabled: false,
+        lifetime: Lifetime::Ping,
+        ..Default::default()
+    });
+
+    metric.set_from_uuid_sync(&glean, value);
+
+    // Check that the data was correctly set in each store.
+    for store_name in store_names {
+        let snapshot = StorageManager
+            .snapshot_as_json(glean.storage(), &store_name, true)
+            .unwrap();
+
+        assert_eq!(
+            json!({"uuid": {"telemetry.uuid_metric": value.to_string()}}),
+            snapshot
+        );
+    }
+}