Add functional test (#26)

Problem:
Ensure the exporter library correctly sends telemetry data via OTel

Solution:
Add a functional test:
- Exporter sends telemetry data to an OTel collector
- Ensure the collector successfully receives the data by looking at
its logs
- Include the test into GitHub pipeline.

CLOSES #7

Co-authored-by: Ciara Stacke <[email protected]>
Co-authored-by: Saylor Berman <[email protected]>
Co-authored-by: Luca Comellini <[email protected]>

.github/dependabot.yml

@@ -9,3 +9,8 @@ updates:
     directory: /
     schedule:
       interval: daily
+
+  - package-ecosystem: docker
+    directory: /tests
+    schedule:
+      interval: daily

.github/workflows/ci.yml

@@ -64,5 +64,22 @@ jobs:
         uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3 # v4.3.1
         with:
           name: cover-${{ github.run_id }}.html
-          path: ${{ github.workspace }}/cmd-cover.html
+          path: |
+            ${{ github.workspace }}/cover.html
+            ${{ github.workspace }}/generator-cover.html
         if: always()
+
+  functional-tests:
+    name: Functional Tests
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+    - name: Setup Golang Environment
+      uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+      with:
+        go-version: stable
+
+    - name: Run Functional Tests
+      run: make functional-test

Makefile

@@ -7,10 +7,10 @@ help: Makefile ## Display this help
 
 .PHONY: unit-test
 unit-test:
-	go test ./... -race -coverprofile cmd-cover.out
-	go tool cover -html=cmd-cover.out -o cmd-cover.html
-	go test -tags generator ./cmd/generator/... -race -coverprofile generator-cmd-cover.out
-	go tool cover -html=generator-cmd-cover.out -o generator-cmd-cover.html
+	go test ./pkg/... -race -shuffle=on -coverprofile=cover.out -covermode=atomic
+	go tool cover -html=cover.out -o cover.html
+	go test -tags generator ./cmd/generator/... -race -coverprofile=generator-cover.out
+	go tool cover -html=generator-cover.out -o generator-cover.html
 
 .PHONY: clean-go-cache
 clean-go-cache: ## Clean go cache
@@ -43,4 +43,8 @@ generate: ## Run go generate
 .PHONY: generator-tests
 generator-tests: ## Regenerate the generator generated files and run generator unit tests
 	go generate -tags generator ./cmd/generator/... # ensure the generated files generated by the generator are up to date
-	go test -tags generator ./cmd/generator/... -race -coverprofile cmd-cover.out
+	go test -tags generator ./cmd/generator/... -race -coverprofile=generator-cover.out
+
+.PHONY: functional-test
+functional-test: ## Run functional tests
+	go run github.com/onsi/ginkgo/v2/ginkgo --randomize-all --randomize-suites --race --keep-going --fail-on-pending --trace --covermode=atomic --coverprofile=functional-cover.out -r tests

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/maxbrunsfeld/counterfeiter/v6 v6.8.1
 	github.com/onsi/ginkgo/v2 v2.16.0
 	github.com/onsi/gomega v1.31.1
+	github.com/testcontainers/testcontainers-go v0.28.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.24.0
@@ -15,16 +16,51 @@ require (
 )
 
 require (
+	dario.cat/mergo v1.0.0 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
+	github.com/Microsoft/go-winio v0.6.1 // indirect
+	github.com/Microsoft/hcsshim v0.11.4 // indirect
 	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
+	github.com/containerd/containerd v1.7.12 // indirect
+	github.com/containerd/log v0.1.0 // indirect
+	github.com/cpuguy83/dockercfg v0.3.1 // indirect
+	github.com/distribution/reference v0.5.0 // indirect
+	github.com/docker/docker v25.0.3+incompatible // indirect
+	github.com/docker/go-connections v0.5.0 // indirect
+	github.com/docker/go-units v0.5.0 // indirect
+	github.com/felixge/httpsnoop v1.0.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 // indirect
+	github.com/klauspost/compress v1.16.0 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/moby/patternmatcher v0.6.0 // indirect
+	github.com/moby/sys/sequential v0.5.0 // indirect
+	github.com/moby/sys/user v0.1.0 // indirect
+	github.com/moby/term v0.5.0 // indirect
+	github.com/morikuni/aec v1.0.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.0-rc5 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/shirou/gopsutil/v3 v3.23.12 // indirect
+	github.com/shoenig/go-m1cpu v0.1.6 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.3 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.1.0 // indirect
+	golang.org/x/exp v0.0.0-20230510235704-dd950f8aeaea // indirect
 	golang.org/x/mod v0.16.0 // indirect
 	golang.org/x/net v0.22.0 // indirect
 	golang.org/x/sys v0.18.0 // indirect