add platformtest: infrastructure for ZFS compatiblity testing

platformtest/harness/harness.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"time"
+
+	"github.com/fatih/color"
+	"github.com/zrepl/zrepl/config"
+	"github.com/zrepl/zrepl/daemon/logging"
+	"github.com/zrepl/zrepl/logger"
+	"github.com/zrepl/zrepl/platformtest"
+	"github.com/zrepl/zrepl/platformtest/tests"
+)
+
+func main() {
+
+	root := flag.String("root", "", "empty root filesystem under which we conduct the platform test")
+	flag.Parse()
+	if *root == "" {
+		panic(*root)
+	}
+
+	outlets := logger.NewOutlets()
+	outlet, level, err := logging.ParseOutlet(config.LoggingOutletEnum{Ret: &config.StdoutLoggingOutlet{
+		LoggingOutletCommon: config.LoggingOutletCommon{
+			Level:  "debug",
+			Format: "human",
+		},
+	}})
+	if err != nil {
+		panic(err)
+	}
+	outlets.Add(outlet, level)
+	logger := logger.NewLogger(outlets, 1*time.Second)
+
+	ctx := &platformtest.Context{
+		Context:     platformtest.WithLogger(context.Background(), logger),
+		RootDataset: *root,
+	}
+
+	bold := color.New(color.Bold)
+	for _, c := range tests.Cases {
+		bold.Printf("BEGIN TEST CASE %s\n", c)
+		c(ctx)
+		bold.Printf("DONE  TEST CASE %s\n", c)
+		fmt.Println()
+	}
+
+}

platformtest/harness/harness_test.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+// Idea taken from
+// https://github.com/openSUSE/umoci/blob/v0.2.1/cmd/umoci/main_test.go
+//
+// How to generate coverage:
+// go test -c -covermode=atomic -cover -coverpkg github.com/zrepl/zrepl/...
+// sudo ../logmockzfs/logzfsenv /tmp/zrepl_platform_test.log /usr/bin/zfs \
+//     ./harness.test -test.coverprofile=/tmp/harness.out \
+//     -test.v __DEVEL--i-heard-you-like-tests \
+//     -root rpool/zreplplayground
+//  go tool cover -html=/tmp/harness.out -o /tmp/harness.html
+//
+// Merge with existing coverage reports using gocovmerge:
+//  https://github.com/wadey/gocovmerge
+
+func TestMain(t *testing.T) {
+	var (
+		args []string
+		run  bool
+	)
+
+	for _, arg := range os.Args {
+		switch {
+		case arg == "__DEVEL--i-heard-you-like-tests":
+			run = true
+		case strings.HasPrefix(arg, "-test"):
+		case strings.HasPrefix(arg, "__DEVEL"):
+		default:
+			args = append(args, arg)
+		}
+	}
+	os.Args = args
+
+	if run {
+		main()
+	}
+}