Skill v1.0.0

currentTrusted Publisher100/100

microsoft/duroxide/duroxide-code-coverage

──Details

PublishedJune 18, 2026 at 11:16 AM

Content Hashsha256:78e0507e3aeb2433...

Git SHA

──Files

Files (1 file, 2.7 KB)

SKILL.md2.7 KBactive

SKILL.md · 95 lines · 2.7 KB

version: "1.0.0" name: duroxide-code-coverage description: Measure and improve code coverage in the Duroxide durable execution runtime. Use when asked about coverage, testing coverage, running llvm-cov, or improving test coverage percentages. license: Apache-2.0 metadata: author: duroxide version: "1.0"

Duroxide Code Coverage

Guidance for measuring and improving code coverage in the Duroxide codebase.

Quick Commands

bash

# Summary (recommended for quick checks)
cargo llvm-cov nextest -p duroxide --all-features --summary-only
 
# Detailed per-file report
cargo llvm-cov nextest -p duroxide --all-features
 
# HTML report (opens in browser)
cargo llvm-cov nextest -p duroxide --all-features --html --open
 
# Install llvm-cov if needed
cargo install cargo-llvm-cov

Coverage Targets

Metric	Target	Notes
Lines	>90%	Primary metric
Regions	>85%	Branch coverage
Functions	>80%	Often lower due to unused helpers

Priority Files

When coverage drops, focus on these files:

src/providers/error.rs - Target 100%, error classification
src/runtime/observability.rs - Target 90%, metrics correctness
src/providers/sqlite.rs - Target 85%, reference implementation
src/providers/instrumented.rs - Target 75%, observability wrapper
src/providers/management.rs - Note: default trait impls inflate gaps

Adding Tests

Gap Type	Location
Management API	`tests/coverage_improvement_tests.rs`
Provider validation	`tests/sqlite_provider_validations.rs`
Observability	`tests/observability_tests.rs`
SQLite edge cases	`src/providers/sqlite.rs` (inline tests)

Test Patterns

Management API

rust

#[tokio::test]
async fn test_management() {
    let store = Arc::new(SqliteProvider::new_in_memory().await.unwrap());
    let mgmt = store.as_management_capability().unwrap();
    assert!(mgmt.list_instances().await.is_ok());
}

Metrics

rust

#[tokio::test]
async fn test_metrics() {
    use duroxide::runtime::observability::{MetricsProvider, ObservabilityConfig};
    let metrics = MetricsProvider::new(&ObservabilityConfig::default()).unwrap();
    metrics.record_orchestration_failure("Orch", "1.0", "app_error", "cat");
    assert_eq!(metrics.snapshot().orch_application_errors, 1);
}

Provider Errors

rust

#[tokio::test]
async fn test_error() {
    let err = ProviderError::retryable("op", "msg");
    assert!(err.is_retryable());
}

Troubleshooting

"no such command: llvm-cov" → cargo install cargo-llvm-cov
Coverage seems low → Use -p duroxide (not --workspace)
Stale data → cargo llvm-cov clean --workspace

All versions