add a test suite runner

test/suite.go

+package dstest
+
+import (
+	"reflect"
+	"runtime"
+	"testing"
+
+	dstore "github.com/ipfs/go-datastore"
+)
+
+// BasicSubtests is a list of all basic tests.
+var BasicSubtests = []func(t *testing.T, ds dstore.Datastore){
+	SubtestBasicPutGet,
+	SubtestNotFounds,
+	SubtestManyKeysAndQuery,
+}
+
+// BatchSubtests is a list of all basic batching datastore tests.
+var BatchSubtests = []func(t *testing.T, ds dstore.Batching){
+	RunBatchTest,
+	RunBatchDeleteTest,
+}
+
+func getFunctionName(i interface{}) string {
+	return runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name()
+}
+
+// SubtestAll tests the given datastore against all the subtests.
+func SubtestAll(t *testing.T, ds dstore.Datastore) {
+	for _, f := range BasicSubtests {
+		t.Run(getFunctionName(f), func(t *testing.T) {
+			f(t, ds)
+		})
+	}
+	if _, ok := ds.(dstore.Batching); ok {
+		for _, f := range BasicSubtests {
+			t.Run(getFunctionName(f), func(t *testing.T) {
+				f(t, ds)
+			})
+		}
+	}
+}