add restic integration for doing pod volume backups/restores

Signed-off-by: Steve Kriss <steve@heptio.com>

pkg/util/test/helpers.go

@@ -0,0 +1,21 @@
+package test
+
+import (
+	"encoding/json"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+)
+
+func UnstructuredOrDie(data string) *unstructured.Unstructured {
+	o, _, err := unstructured.UnstructuredJSONScheme.Decode([]byte(data), nil, nil)
+	if err != nil {
+		panic(err)
+	}
+	return o.(*unstructured.Unstructured)
+}
+
+func GetAsMap(j string) (map[string]interface{}, error) {
+	m := make(map[string]interface{})
+	err := json.Unmarshal([]byte(j), &m)
+	return m, err
+}

pkg/util/test/mock_pod_command_executor.go

@@ -0,0 +1,17 @@
+package test
+
+import (
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/mock"
+
+	"github.com/heptio/ark/pkg/apis/ark/v1"
+)
+
+type MockPodCommandExecutor struct {
+	mock.Mock
+}
+
+func (e *MockPodCommandExecutor) ExecutePodCommand(log logrus.FieldLogger, item map[string]interface{}, namespace, name, hookName string, hook *v1.ExecHook) error {
+	args := e.Called(log, item, namespace, name, hookName, hook)
+	return args.Error(0)
+}