tests(app): 🎤 add app_tracks_validator_uptimes test

crates/core/app/tests/app_tracks_validator_uptimes.rs

@@ -0,0 +1,55 @@
+mod common;
+
+use {
+    self::common::BuilderExt, cnidarium::TempStorage, penumbra_app::server::consensus::Consensus,
+    penumbra_genesis::AppState, penumbra_keys::test_keys, penumbra_mock_client::MockClient,
+    penumbra_mock_consensus::TestNode, tap::Tap, tracing::info,
+};
+
+/// The length of the [`penumbra_sct`] epoch.
+///
+/// This test relies on many epochs turning over, so we will work with a shorter epoch duration.
+const EPOCH_DURATION: u64 = 8;
+
+#[tokio::test]
+// ci: ignore this test and allow some specific warnings, until this test is written.
+#[ignore = "not written yet"]
+#[allow(unused_variables, unused_mut, unreachable_code)] // `todo!` fools some lints.
+async fn app_tracks_validator_uptimes() -> anyhow::Result<()> {
+    // Install a test logger, acquire some temporary storage, and start the test node.
+    let guard = common::set_tracing_subscriber();
+    let storage = TempStorage::new().await?;
+
+    // Configure an AppState with slightly shorter epochs than usual.
+    let app_state = AppState::Content(penumbra_genesis::Content {
+        sct_content: penumbra_sct::genesis::Content {
+            sct_params: penumbra_sct::params::SctParameters {
+                epoch_duration: EPOCH_DURATION,
+            },
+        },
+        ..Default::default()
+    });
+
+    // Start the test node.
+    let mut node = {
+        let consensus = Consensus::new(storage.as_ref().clone());
+        TestNode::builder()
+            .single_validator()
+            .with_penumbra_auto_app_state(app_state)?
+            .init_chain(consensus)
+            .await
+    }?;
+
+    // Sync the mock client, using the test wallet's spend key, to the latest snapshot.
+    let mut client = MockClient::new(test_keys::SPEND_KEY.clone())
+        .with_sync_to_storage(&storage)
+        .await?
+        .tap(|c| info!(client.notes = %c.notes.len(), "mock client synced to test storage"));
+
+    todo!("write test assertions");
+
+    Ok(())
+        .tap(|_| drop(node))
+        .tap(|_| drop(storage))
+        .tap(|_| drop(guard))
+}