1 files changed, 177 insertions, 0 deletions
diff --git a/third_party/rust/glean-core/tests/counter.rs b/third_party/rust/glean-core/tests/counter.rs
new file mode 100644
index 0000000000..bdcd232773
--- /dev/null
+++ b/third_party/rust/glean-core/tests/counter.rs
@@ -0,0 +1,177 @@
+// 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::{test_get_num_recorded_errors, ErrorType};
+use glean_core::{CommonMetricData, Lifetime};
+
+// Tests ported from glean-ac
+
+// SKIPPED from glean-ac: counter deserializer should correctly parse integers
+// This test doesn't really apply to rkv
+
+#[test]
+fn counter_serializer_should_correctly_serialize_counters() {
+    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 = CounterMetric::new(CommonMetricData {
+            name: "counter_metric".into(),
+            category: "telemetry".into(),
+            send_in_pings: vec!["store1".into()],
+            disabled: false,
+            lifetime: Lifetime::User,
+            ..Default::default()
+        });
+
+        metric.add_sync(&glean, 1);
+
+        let snapshot = StorageManager
+            .snapshot_as_json(glean.storage(), "store1", true)
+            .unwrap();
+        assert_eq!(
+            json!({"counter": {"telemetry.counter_metric": 1}}),
+            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!({"counter": {"telemetry.counter_metric": 1}}),
+            snapshot
+        );
+    }
+}
+
+#[test]
+fn set_value_properly_sets_the_value_in_all_stores() {
+    let (glean, _t) = new_glean(None);
+    let store_names: Vec<String> = vec!["store1".into(), "store2".into()];
+
+    let metric = CounterMetric::new(CommonMetricData {
+        name: "counter_metric".into(),
+        category: "telemetry".into(),
+        send_in_pings: store_names.clone(),
+        disabled: false,
+        lifetime: Lifetime::Ping,
+        ..Default::default()
+    });
+
+    metric.add_sync(&glean, 1);
+
+    for store_name in store_names {
+        let snapshot = StorageManager
+            .snapshot_as_json(glean.storage(), &store_name, true)
+            .unwrap();
+
+        assert_eq!(
+            json!({"counter": {"telemetry.counter_metric": 1}}),
+            snapshot
+        );
+    }
+}
+
+// SKIPPED from glean-ac: counters are serialized in the correct JSON format
+// Completely redundant with other tests.
+
+#[test]
+fn counters_must_not_increment_when_passed_zero_or_negative() {
+    let (glean, _t) = new_glean(None);
+
+    let metric = CounterMetric::new(CommonMetricData {
+        name: "counter_metric".into(),
+        category: "telemetry".into(),
+        send_in_pings: vec!["store1".into()],
+        disabled: false,
+        lifetime: Lifetime::Application,
+        ..Default::default()
+    });
+
+    // Attempt to increment the counter with zero
+    metric.add_sync(&glean, 0);
+    // Check that nothing was recorded
+    assert!(metric.get_value(&glean, Some("store1")).is_none());
+
+    // Attempt to increment the counter with negative
+    metric.add_sync(&glean, -1);
+    // Check that nothing was recorded
+    assert!(metric.get_value(&glean, Some("store1")).is_none());
+
+    // Attempt increment counter properly
+    metric.add_sync(&glean, 1);
+    // Check that nothing was recorded
+    assert_eq!(1, metric.get_value(&glean, Some("store1")).unwrap());
+
+    // Make sure that the error has been recorded
+    assert_eq!(
+        Ok(1),
+        test_get_num_recorded_errors(&glean, metric.meta(), ErrorType::InvalidValue)
+    );
+}
+
+// New tests for glean-core below
+
+#[test]
+fn transformation_works() {
+    let (glean, _t) = new_glean(None);
+
+    let counter: CounterMetric = CounterMetric::new(CommonMetricData {
+        name: "transformation".into(),
+        category: "local".into(),
+        send_in_pings: vec!["store1".into(), "store2".into()],
+        ..Default::default()
+    });
+
+    counter.add_sync(&glean, 2);
+
+    assert_eq!(2, counter.get_value(&glean, Some("store1")).unwrap());
+    assert_eq!(2, counter.get_value(&glean, Some("store2")).unwrap());
+
+    // Clearing just one store
+    let _ = StorageManager
+        .snapshot_as_json(glean.storage(), "store1", true)
+        .unwrap();
+
+    counter.add_sync(&glean, 2);
+
+    assert_eq!(2, counter.get_value(&glean, Some("store1")).unwrap());
+    assert_eq!(4, counter.get_value(&glean, Some("store2")).unwrap());
+}
+
+#[test]
+fn saturates_at_boundary() {
+    let (glean, _t) = new_glean(None);
+
+    let counter: CounterMetric = CounterMetric::new(CommonMetricData {
+        name: "transformation".into(),
+        category: "local".into(),
+        send_in_pings: vec!["store1".into()],
+        ..Default::default()
+    });
+
+    counter.add_sync(&glean, 2);
+    counter.add_sync(&glean, i32::max_value());
+
+    assert_eq!(
+        i32::max_value(),
+        counter.get_value(&glean, Some("store1")).unwrap()
+    );
+}