Improve Test Coverage: Unit, Observability, and Concurrency Suites

AGENTS.md

@@ -6,7 +6,7 @@ Guide for AI coding agents working on the Commerce System Demo project.
 
 Commerce System Demo is a FastAPI-based commerce service that provides RESTful APIs for managing products, categories, and implementing search functionality. The project includes built-in observability with OpenTelemetry metrics, logging, and distributed tracing.
 
-**Current Version**: 0.1.1 (following [Semantic Versioning](https://semver.org/))
+**Current Version**: 0.1.2 (following [Semantic Versioning](https://semver.org/))
 
 ## Setup Commands
 
@@ -101,7 +101,7 @@ app/
 
 ### Docker
 
-- **Build image**: `docker build -t commerce-system-demo:0.1.1 .`
+- **Build image**: `docker build -t commerce-system-demo:0.1.2 .`
 - **View Dockerfile**: Includes Python dependencies, migration scripts, and app code
 - **Build context**: Includes `scripts/`, `app/`, and `observability/` directories
 
@@ -184,7 +184,7 @@ This project follows [Semantic Versioning 2.0.0](https://semver.org/):
 - **MINOR**: Backward-compatible new features
 - **PATCH**: Backward-compatible bug fixes
 
-Current version is **0.1.1** (initial development). Version is defined in:
+Current version is **0.1.2** (initial development). Version is defined in:
 - `pyproject.toml` (project metadata)
 - `app/main.py` (FastAPI version)
 - `app/observability/metrics.py` (meter version)

CHANGELOG.md

@@ -15,6 +15,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Advanced filtering options for product search
 - Product images storage optimization
 
+## [0.1.2] - 2026-03-20
+
+### Added
+
+- Unit tests for API handler branches covering success paths and edge cases (test_api_unit.py)
+- Service-level tests for category depth limit and cycle detection logic (test_category_service.py)
+- Unit tests for observability middleware and metrics emission paths (test_observability.py)
+- Concurrent access integration tests for race conditions on SKU and category constraints (test_concurrency.py)
+
 ## [0.1.1] - 2026-03-19
 
 ### Fixed

app/main.py

@@ -77,7 +77,7 @@ def create_app() -> FastAPI:
 
     app = FastAPI(
         title="Commerce System Demo",
-        version="0.1.1",
+        version="0.1.2",
         lifespan=lifespan,
     )
     app.router.route_class = ObservabilityRoute

app/observability/metrics.py

@@ -3,7 +3,7 @@
 from opentelemetry import metrics
 from opentelemetry.metrics import Counter, Histogram, UpDownCounter
 
-_meter = metrics.get_meter("commerce-system-demo-observability", version="0.1.1")
+_meter = metrics.get_meter("commerce-system-demo-observability", version="0.1.2")
 
 http_request_duration_seconds: Histogram = _meter.create_histogram(
     name="commerce_http_request_duration_seconds",

app/observability/setup.py

@@ -76,7 +76,7 @@ def _build_resource(settings: Settings) -> Resource:
     """Build OpenTelemetry resource attributes from runtime settings."""
     attributes = {
         "service.name": settings.otel_service_name,
-        "service.version": "0.1.1",
+        "service.version": "0.1.2",
         "deployment.environment": settings.otel_environment,
     }
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "commerce-system-demo"
-version = "0.1.1"
+version = "0.1.2"
 description = "FastAPI commerce service demo"
 readme = "README.md"
 requires-python = ">=3.11"