Run code coverage tests and upload to codecov

Signed-off-by: Adrian Reber <areber@redhat.com>

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: [1.14.x, 1.15.x, 1.16.x]
+        go-version: [1.15.x, 1.16.x, 1.17.x]
         criu_branch: [master, criu-dev]
 
     steps:
@@ -35,3 +35,11 @@ jobs:
         sudo make test phaul-test
         # This builds crit-go
         sudo make -C crit-go/magic-gen build magicgen test
+
+    - name: Check code coverage
+      if: matrix.go-version == '1.17.x' && matrix.criu_branch == 'criu-dev'
+      run: |
+        # Run actual test as root as it uses CRIU.
+        sudo make coverage
+        # Upload coverage results to codecov
+        sudo -E make codecov

.github/workflows/verify.yml

@@ -9,7 +9,7 @@ jobs:
     - uses: golangci/golangci-lint-action@v2
       with:
         # must be specified without patch version
-        version: v1.36
+        version: v1.42
         # Only show new issues for a pull request.
         only-new-issues: true
 

.gitignore

@@ -1,4 +1,6 @@
 test/test
+test/test.coverage
 test/piggie/piggie
-test/phaul
+test/phaul/phaul
+test/phaul/phaul.coverage
 image

Makefile

@@ -1,5 +1,7 @@
+SHELL = /bin/bash
 GO ?= go
 CC ?= gcc
+COVERAGE_PATH ?= $(shell pwd)/.coverage
 
 all: build test phaul-test
 
@@ -9,13 +11,15 @@ lint:
 build:
 	$(GO) build -v ./...
 
-TEST_BINARIES := test/test test/piggie/piggie test/phaul/phaul
+TEST_PAYLOAD := test/piggie/piggie
+TEST_BINARIES := test/test $(TEST_PAYLOAD) test/phaul/phaul
+COVERAGE_BINARIES := test/test.coverage test/phaul/phaul.coverage
 test-bin: $(TEST_BINARIES)
 
 test/piggie/piggie: test/piggie/piggie.c
 	$(CC) $^ -o $@
 
-test/test: test/*.go
+test/test: test/main.go
 	$(GO) build -v -o $@ $^
 
 test: $(TEST_BINARIES)
@@ -27,7 +31,7 @@ test: $(TEST_BINARIES)
 	}
 	rm -rf image
 
-test/phaul/phaul: test/phaul/*.go
+test/phaul/phaul: test/phaul/main.go
 	$(GO) build -v -o $@ $^
 
 phaul-test: $(TEST_BINARIES)
@@ -37,9 +41,39 @@ phaul-test: $(TEST_BINARIES)
 	pkill -9 piggie; \
 	}
 
+test/test.coverage: test/*.go
+	$(GO) test \
+		-covermode=count \
+		-coverpkg=./... \
+		-mod=vendor \
+		-tags coverage \
+		-buildmode=pie -c -o $@ $^
+
+test/phaul/phaul.coverage: test/phaul/*.go
+	$(GO) test \
+		-covermode=count \
+		-coverpkg=./... \
+		-mod=vendor \
+		-tags coverage \
+		-buildmode=pie -c -o $@ $^
+
+coverage: $(COVERAGE_BINARIES) $(TEST_PAYLOAD)
+	mkdir -p $(COVERAGE_PATH)
+	mkdir -p image
+	PID=$$(test/piggie/piggie) && { \
+	test/test.coverage -test.coverprofile=coverprofile.integration.$$RANDOM -test.outputdir=${COVERAGE_PATH} COVERAGE dump $$PID image && \
+	test/test.coverage -test.coverprofile=coverprofile.integration.$$RANDOM -test.outputdir=${COVERAGE_PATH} COVERAGE restore image; \
+	pkill -9 piggie; \
+	}
+	rm -rf image
+	PID=$$(test/piggie/piggie) && { \
+	test/phaul/phaul.coverage -test.coverprofile=coverprofile.integration.$$RANDOM -test.outputdir=${COVERAGE_PATH} COVERAGE $$PID; \
+	pkill -9 piggie; \
+	}
+
 clean:
-	@rm -f $(TEST_BINARIES)
-	@rm -rf image
+	@rm -f $(TEST_BINARIES) $(COVERAGE_BINARIES) codecov
+	@rm -rf image $(COVERAGE_PATH)
 
 rpc/rpc.proto:
 	curl -sSL https://raw.githubusercontent.com/checkpoint-restore/criu/master/images/rpc.proto -o $@
@@ -58,4 +92,9 @@ vendor:
 	GO111MODULE=on $(GO) mod vendor
 	GO111MODULE=on $(GO) mod verify
 
-.PHONY: build test phaul-test test-bin clean lint vendor
+codecov:
+	curl -Os https://uploader.codecov.io/latest/linux/codecov
+	chmod +x codecov
+	./codecov -f '.coverage/*'
+
+.PHONY: build test phaul-test test-bin clean lint vendor coverage codecov

test/main_coverage_test.go

@@ -0,0 +1,39 @@
+// +build coverage
+
+package main
+
+import (
+	"os"
+	"os/signal"
+	"strings"
+	"testing"
+)
+
+// NOTE: do not use this in production.  Binaries built with this file are
+// merely useful to collect coverage data.
+func TestCoverageMain(_ *testing.T) {
+	var args []string
+
+	for _, arg := range os.Args {
+		switch {
+		case strings.HasPrefix(arg, "COVERAGE"):
+			// Dummy argument to enable global flags.
+		case strings.HasPrefix(arg, "-test"):
+			// Make sure we don't pass `go test` specific flags to
+			// main.
+		default:
+			args = append(args, arg)
+		}
+	}
+
+	signal.Reset()
+	os.Args = args
+	main() // "run" to
+
+	// Make sure that std{err,out} write to /dev/null so we prevent the
+	// testing backend to print "PASS" along with the coverage.  We really
+	// want the coverage to be set via the `-test.coverprofile=$path` flag.
+	null, _ := os.Open(os.DevNull)
+	os.Stdout = null
+	os.Stderr = null
+}

test/main_test.go

@@ -0,0 +1,11 @@
+package main_test
+
+import (
+	"testing"
+)
+
+func TestMain(t *testing.T) {
+	// Do nothing. We just need dummy to make `ginkgo` happy. Without that,
+	// `ginkgo` would try to execute the _coverage_test.go _despite_ the
+	t.Parallel()
+}

test/phaul/main_coverage_test.go

@@ -0,0 +1,39 @@
+// +build coverage
+
+package main
+
+import (
+	"os"
+	"os/signal"
+	"strings"
+	"testing"
+)
+
+// NOTE: do not use this in production.  Binaries built with this file are
+// merely useful to collect coverage data.
+func TestCoverageMain(_ *testing.T) {
+	var args []string
+
+	for _, arg := range os.Args {
+		switch {
+		case strings.HasPrefix(arg, "COVERAGE"):
+			// Dummy argument to enable global flags.
+		case strings.HasPrefix(arg, "-test"):
+			// Make sure we don't pass `go test` specific flags to
+			// main.
+		default:
+			args = append(args, arg)
+		}
+	}
+
+	signal.Reset()
+	os.Args = args
+	main() // "run" it
+
+	// Make sure that std{err,out} write to /dev/null so we prevent the
+	// testing backend to print "PASS" along with the coverage.  We really
+	// want the coverage to be set via the `-test.coverprofile=$path` flag.
+	null, _ := os.Open(os.DevNull)
+	os.Stdout = null
+	os.Stderr = null
+}

test/phaul/main_test.go

@@ -0,0 +1,11 @@
+package main_test
+
+import (
+	"testing"
+)
+
+func TestMain(t *testing.T) {
+	// Do nothing. We just need dummy to make `ginkgo` happy. Without that,
+	// `ginkgo` would try to execute the _coverage_test.go _despite_ the
+	t.Parallel()
+}