feat: add KinD integration tests

.github/workflows/integration.yaml

@@ -0,0 +1,46 @@
+name: integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  actions: none
+  checks: none
+  contents: read
+  deployments: none
+  issues: none
+  packages: none
+  pull-requests: none
+  repository-projects: none
+  security-events: none
+  statuses: none
+
+# Cancel in-progress runs for pull requests when developers push
+# additional changes
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  integration-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+
+      - name: Setup Go
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
+        with:
+          go-version: "~1.22"
+
+      - name: Create KinD cluster
+        uses: helm/kind-action@ca7011b09d9a57d57555716e97a4acea579a2b92 # v1
+        with:
+          cluster_name: integration-test
+
+      - name: Run integration tests
+        run: go test -tags=integration -v -timeout=8m ./...

.gitignore

@@ -1,2 +1,2 @@
 coder-logstream-kube-*
-build
+buildcoder-logstream-kube

Makefile

@@ -0,0 +1,87 @@
+# Colors for output
+GREEN := $(shell printf '\033[32m')
+RESET := $(shell printf '\033[0m')
+BOLD := $(shell printf '\033[1m')
+
+# Shell source files - use shfmt to find them (respects .editorconfig)
+SHELL_SRC_FILES := $(shell shfmt -f .)
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build:
+	go build ./...
+
+.PHONY: test
+test:
+	go test ./... -race
+
+.PHONY: test/integration
+test/integration:
+	go test -tags=integration -v -timeout=8m ./...
+
+.PHONY: lint
+lint: lint/go lint/shellcheck
+
+.PHONY: lint/go
+lint/go:
+	golangci-lint run --timeout=5m
+
+.PHONY: lint/shellcheck
+lint/shellcheck: $(SHELL_SRC_FILES)
+	echo "--- shellcheck"
+	shellcheck --external-sources $(SHELL_SRC_FILES)
+
+.PHONY: fmt
+fmt: fmt/go fmt/shfmt
+
+.PHONY: fmt/go
+fmt/go:
+	go fmt ./...
+
+.PHONY: fmt/shfmt
+fmt/shfmt: $(SHELL_SRC_FILES)
+ifdef FILE
+	# Format single shell script
+	if [[ -f "$(FILE)" ]] && [[ "$(FILE)" == *.sh ]]; then \
+		echo "$(GREEN)==>$(RESET) $(BOLD)fmt/shfmt$(RESET) $(FILE)"; \
+		shfmt -w "$(FILE)"; \
+	fi
+else
+	echo "$(GREEN)==>$(RESET) $(BOLD)fmt/shfmt$(RESET)"
+# Only do diff check in CI, errors on diff.
+ifdef CI
+	shfmt -d $(SHELL_SRC_FILES)
+else
+	shfmt -w $(SHELL_SRC_FILES)
+endif
+endif
+
+.PHONY: clean
+clean:
+	rm -f coder-logstream-kube
+
+.PHONY: kind/create
+kind/create:
+	./scripts/kind-setup.sh create
+
+.PHONY: kind/delete
+kind/delete:
+	./scripts/kind-setup.sh delete
+
+.PHONY: help
+help:
+	@echo "Available targets:"
+	@echo "  build            - Build the project"
+	@echo "  test             - Run unit tests"
+	@echo "  test/integration - Run integration tests (requires KinD cluster)"
+	@echo "  lint             - Run all linters"
+	@echo "  lint/go          - Run golangci-lint"
+	@echo "  lint/shellcheck  - Run shellcheck on shell scripts"
+	@echo "  fmt              - Format all code"
+	@echo "  fmt/go           - Format Go code"
+	@echo "  fmt/shfmt        - Format shell scripts"
+	@echo "  kind/create      - Create KinD cluster for integration tests"
+	@echo "  kind/delete      - Delete KinD cluster"
+	@echo "  clean            - Remove build artifacts"

README.md

@@ -64,3 +64,42 @@ Kubernetes provides an [informers](https://pkg.go.dev/k8s.io/client-go/informers
 
 - [`SSL_CERT_FILE`](https://go.dev/src/crypto/x509/root_unix.go#L19): Specifies the path to an SSL certificate.
 - [`SSL_CERT_DIR`](https://go.dev/src/crypto/x509/root_unix.go#L25): Identifies which directory to check for SSL certificate files.
+
+## Development
+
+### Running Tests
+
+Unit tests can be run with:
+
+```console
+go test ./... -race
+```
+
+### Integration Tests
+
+Integration tests run against a real Kubernetes cluster using [KinD (Kubernetes in Docker)](https://kind.sigs.k8s.io/).
+
+**Prerequisites:**
+- [Docker](https://docs.docker.com/get-docker/)
+- [KinD](https://kind.sigs.k8s.io/docs/user/quick-start/#installation)
+- [kubectl](https://kubernetes.io/docs/tasks/tools/)
+
+**Setup and run:**
+
+```console
+# Create a KinD cluster
+./scripts/kind-setup.sh create
+
+# Run integration tests
+go test -tags=integration -v ./...
+
+# Clean up when done
+./scripts/kind-setup.sh delete
+```
+
+The integration tests validate:
+- Pod event streaming with real Kubernetes informers
+- ReplicaSet event handling
+- Multi-namespace support
+- Label selector filtering
+