Expose MockMicrogridApiClient and MockComponent

Cargo.toml

@@ -23,12 +23,15 @@ tonic = "0.14"
 tonic-prost = "0.14"
 tracing = { version = "0.1" }
 tracing-subscriber = { version = "0.3" }
+tokio-stream = { version = "0.1.17", features = ["sync"], optional = true }
 
 [dev-dependencies]
 tracing-subscriber = { version = "0.3", features = ["std", "env-filter"] }
 tokio = { version = "1.48", features = ["test-util"] }
 tokio-stream = { version = "0.1.17", features = ["sync"] }
 
-
 [build-dependencies]
 tonic-prost-build = { version = "0.14", features = ["cleanup-markdown"] }
+
+[features]
+test-utils = ["dep:tokio-stream"]

RELEASE_NOTES.md

@@ -13,6 +13,9 @@
 - The microgrid client now tolerates the API server being absent or returning incomplete data at startup. `MicrogridClientHandle::try_new` establishes the gRPC connection lazily, so it succeeds regardless of whether the server is reachable; transient stream errors are then handled by the existing per-stream retry loop. `LogicalMeterHandle::try_new` (and therefore `Microgrid::try_new`) wraps the entire component-graph setup — listing components, listing connections, and building the graph — in a single retry loop that sleeps 3 seconds between attempts, so applications block waiting for the server and a valid graph instead of exiting with an error.
 
 - `Bounds::combine_parallel`, `Bounds::intersect`, and `Bounds::merge_if_overlapping` are now public, allowing external callers to combine bounds without going through higher-level types.
+- Put test utils under a feature gate.
+- Added `MockMicrogridApiClient::augment_electrical_component_bounds`: It captures requests so that these can be used in test cases. Obtain the list of captured requests using `MockMicrogridApiClient::augment_bounds_calls_handle` (also new).
+- Added `MockComponent.add_component_bounds`: It allows to add metric bounds to a mock component.
 
 ## Bug Fixes
 

src/client.rs

@@ -18,5 +18,6 @@ pub use proto::common::microgrid::electrical_components::{
     ElectricalComponent, ElectricalComponentCategory,
 };
 
-#[cfg(test)]
-pub(crate) mod test_utils;
+#[cfg(any(test, feature = "test-utils"))]
+#[expect(clippy::unwrap_used, clippy::panic, clippy::expect_used)]
+pub mod test_utils;

src/client/proto.rs

@@ -17,7 +17,7 @@ mod pb {
 // Only export what we need
 pub use pb::frequenz::api::common::v1alpha8 as common;
 pub use pb::frequenz::api::microgrid::v1alpha18 as microgrid;
-#[cfg(test)]
+#[cfg(any(test, feature = "test-utils"))]
 pub use pb::google;
 
 mod electrical_component;

src/client/test_utils.rs

@@ -6,23 +6,25 @@
 mod tokio_synced_clock;
 pub use tokio_synced_clock::TokioSyncedClock;
 
+use std::sync::Mutex;
 use std::{sync::Arc, time::SystemTime};
-
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::Response;
 
+use super::MicrogridApiClient;
 use crate::wall_clock_timer::Clock as _;
 use crate::{
     client::proto::{
         common::{
             metrics::{
-                Metric, MetricSample, MetricValueVariant, SimpleMetricValue, metric_value_variant,
+                Bounds, Metric, MetricSample, MetricValueVariant, SimpleMetricValue,
+                metric_value_variant,
             },
             microgrid::electrical_components::{
                 ElectricalComponent, ElectricalComponentCategory,
                 ElectricalComponentCategorySpecificInfo, ElectricalComponentConnection,
                 ElectricalComponentStateCode, ElectricalComponentStateSnapshot,
-                ElectricalComponentTelemetry, Inverter, InverterType,
+                ElectricalComponentTelemetry, Inverter, InverterType, MetricConfigBounds,
                 electrical_component_category_specific_info::Kind,
             },
         },
@@ -38,8 +40,6 @@ use crate::{
     quantity::{Current, Power, ReactivePower, Voltage},
 };
 
-use super::MicrogridApiClient;
-
 /// A mock implementation of the `MicrogridApiClient` trait for testing purposes.
 ///
 /// This mock client allows setting predefined responses for each method,
@@ -52,6 +52,7 @@ pub struct MockMicrogridApiClient {
     /// share a clone with [`LogicalMeterActor`], and pass another in via
     /// [`MockMicrogridApiClient::new_with_clock`].
     clock: TokioSyncedClock,
+    pub augment_bounds_calls: Arc<Mutex<Vec<AugmentElectricalComponentBoundsRequest>>>,
 }
 
 /// One row per emitted telemetry frame: `(power, reactive_power, voltage,
@@ -182,6 +183,21 @@ impl MockComponent {
         self
     }
 
+    pub fn add_component_bounds(
+        mut self,
+        metric: i32,
+        lower: Option<f32>,
+        upper: Option<f32>,
+    ) -> Self {
+        self.component
+            .metric_config_bounds
+            .push(MetricConfigBounds {
+                metric,
+                config_bounds: Some(Bounds { lower, upper }),
+            });
+        self
+    }
+
     pub fn with_power(mut self, power: Vec<f32>) -> Self {
         let mut metrics = self.metrics;
         for (i, p) in power.iter().enumerate() {
@@ -288,6 +304,7 @@ impl MockMicrogridApiClient {
             components: vec![],
             connections: vec![],
             clock,
+            augment_bounds_calls: Arc::new(Mutex::new(Vec::new())),
         };
 
         fn traverse(node: &MockComponent, client: &mut MockMicrogridApiClient) {
@@ -305,6 +322,13 @@ impl MockMicrogridApiClient {
 
         this_client
     }
+
+    /// Return a handle to captured augment bounds requests.
+    pub fn augment_bounds_calls_handle(
+        &self,
+    ) -> Arc<Mutex<Vec<AugmentElectricalComponentBoundsRequest>>> {
+        self.augment_bounds_calls.clone()
+    }
 }
 
 #[async_trait::async_trait]
@@ -500,7 +524,13 @@ impl MicrogridApiClient for MockMicrogridApiClient {
         _request: impl tonic::IntoRequest<AugmentElectricalComponentBoundsRequest> + Send,
     ) -> std::result::Result<tonic::Response<AugmentElectricalComponentBoundsResponse>, tonic::Status>
     {
-        unimplemented!()
+        // Capture calls for tests
+        let req = _request.into_request().into_inner();
+        self.augment_bounds_calls.lock().unwrap().push(req);
+
+        Ok(Response::new(AugmentElectricalComponentBoundsResponse {
+            valid_until_time: None,
+        }))
     }
 }
 

src/lib.rs

@@ -38,3 +38,6 @@ pub(crate) mod wall_clock_timer;
 
 mod microgrid;
 pub use microgrid::{BatteryPool, Microgrid};
+
+#[cfg(any(test, feature = "test-utils"))]
+pub use client::test_utils;