Add unit test for system verification

test/e2e_node/system/docker_validator_test.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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 system
+
+import (
+	"testing"
+
+	"github.com/docker/engine-api/types"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValidateDockerInfo(t *testing.T) {
+	v := &DockerValidator{}
+	spec := &DockerSpec{
+		Version:     []string{`1\.(9|\d{2,})\..*`},
+		GraphDriver: []string{"driver_1", "driver_2"},
+	}
+	for _, test := range []struct {
+		info types.Info
+		err  bool
+	}{
+		{
+			info: types.Info{Driver: "driver_1", ServerVersion: "1.10.1"},
+			err:  false,
+		},
+		{
+			info: types.Info{Driver: "bad_driver", ServerVersion: "1.9.1"},
+			err:  true,
+		},
+		{
+			info: types.Info{Driver: "driver_2", ServerVersion: "1.8.1"},
+			err:  true,
+		},
+	} {
+		err := v.validateDockerInfo(spec, test.info)
+		if !test.err {
+			assert.Nil(t, err, "Expect error not to occur with docker info %+v", test.info)
+		} else {
+			assert.NotNil(t, err, "Expect error to occur with docker info %+v", test.info)
+		}
+
+	}
+}