update vendor

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/github.com/opencontainers/image-spec/schema/imagelayout_test.go

@@ -0,0 +1,56 @@
+// Copyright 2016 The Linux Foundation
+//
+// 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 schema_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/opencontainers/image-spec/schema"
+)
+
+func TestImageLayout(t *testing.T) {
+	for i, tt := range []struct {
+		imageLayout string
+		fail        bool
+	}{
+		// expected faulure:  imageLayoutVersion does not match pattern
+		{
+			imageLayout: `
+{
+  "imageLayoutVersion": 1.0.0
+}
+`,
+			fail: true,
+		},
+
+		// validate layout
+		{
+			imageLayout: `
+{
+  "imageLayoutVersion": "1.0.0"
+}
+`,
+			fail: false,
+		},
+	} {
+		r := strings.NewReader(tt.imageLayout)
+		err := schema.ValidatorMediaTypeLayoutHeader.Validate(r)
+
+		if got := err != nil; tt.fail != got {
+			t.Errorf("test %d: expected validation failure %t but got %t, err %v", i, tt.fail, got, err)
+		}
+	}
+}