Move validation of plugins (#1953)

* Move validation of plugins

Signed-off-by: Carlisia <carlisia@vmware.com>

pkg/plugin/framework/validation_test.go

@@ -0,0 +1,37 @@
+/*
+Copyright 2019 the Velero contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package framework
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValidateConfigKeys(t *testing.T) {
+	assert.NoError(t, validateConfigKeys(nil))
+	assert.NoError(t, validateConfigKeys(map[string]string{}))
+	assert.NoError(t, validateConfigKeys(map[string]string{"foo": "bar"}, "foo"))
+	assert.NoError(t, validateConfigKeys(map[string]string{"foo": "bar", "bar": "baz"}, "foo", "bar"))
+
+	assert.Error(t, validateConfigKeys(map[string]string{"foo": "bar"}))
+	assert.Error(t, validateConfigKeys(map[string]string{"foo": "bar"}, "Foo"))
+	assert.Error(t, validateConfigKeys(map[string]string{"foo": "bar", "boo": ""}, "foo"))
+
+	assert.NoError(t, ValidateObjectStoreConfigKeys(map[string]string{"bucket": "foo"}))
+	assert.Error(t, ValidateVolumeSnapshotterConfigKeys(map[string]string{"bucket": "foo"}))
+}