virtcontainers: Initial import

This is a virtcontainers 1.0.8 import into Kata Containers runtime.

virtcontainers is a Go library designed to manage hardware virtualized
pods and containers. It is the core Clear Containers framework and will
become the core Kata Containers framework, as discussed at
https://github.com/kata-containers/runtime/issues/33

Some more more pointers:

virtcontainers README, including some design and architecure notes:
https://github.com/containers/virtcontainers/blob/master/README.md

virtcontainers 1.0 API:
https://github.com/containers/virtcontainers/blob/master/documentation/api/1.0/api.md

Fixes #40

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

virtcontainers/asset_test.go

@@ -0,0 +1,117 @@
+//
+// Copyright (c) 2017 Intel Corporation
+//
+// 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 virtcontainers
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/containers/virtcontainers/pkg/annotations"
+	"github.com/stretchr/testify/assert"
+)
+
+var assetContent = []byte("FakeAsset fake asset FAKE ASSET")
+var assetContentHash = "92549f8d2018a95a294d28a65e795ed7d1a9d150009a28cea108ae10101178676f04ab82a6950d0099e4924f9c5e41dcba8ece56b75fc8b4e0a7492cb2a8c880"
+var assetContentWrongHash = "92549f8d2018a95a294d28a65e795ed7d1a9d150009a28cea108ae10101178676f04ab82a6950d0099e4924f9c5e41dcba8ece56b75fc8b4e0a7492cb2a8c881"
+
+func TestAssetWrongHashType(t *testing.T) {
+	assert := assert.New(t)
+
+	tmpfile, err := ioutil.TempFile("", "virtcontainers-test-")
+	assert.Nil(err)
+
+	defer func() {
+		tmpfile.Close()
+		os.Remove(tmpfile.Name()) // clean up
+	}()
+
+	_, err = tmpfile.Write(assetContent)
+	assert.Nil(err)
+
+	a := &asset{
+		path: tmpfile.Name(),
+	}
+
+	h, err := a.hash("shafoo")
+	assert.Equal(h, "")
+	assert.NotNil(err)
+}
+
+func TestAssetHash(t *testing.T) {
+	assert := assert.New(t)
+
+	tmpfile, err := ioutil.TempFile("", "virtcontainers-test-")
+	assert.Nil(err)
+
+	defer func() {
+		tmpfile.Close()
+		os.Remove(tmpfile.Name()) // clean up
+	}()
+
+	_, err = tmpfile.Write(assetContent)
+	assert.Nil(err)
+
+	a := &asset{
+		path: tmpfile.Name(),
+	}
+
+	hash, err := a.hash(annotations.SHA512)
+	assert.Nil(err)
+	assert.Equal(assetContentHash, hash)
+	assert.Equal(assetContentHash, a.computedHash)
+}
+
+func TestAssetNew(t *testing.T) {
+	assert := assert.New(t)
+
+	tmpfile, err := ioutil.TempFile("", "virtcontainers-test-")
+	assert.Nil(err)
+
+	defer func() {
+		tmpfile.Close()
+		os.Remove(tmpfile.Name()) // clean up
+	}()
+
+	_, err = tmpfile.Write(assetContent)
+	assert.Nil(err)
+
+	p := &PodConfig{
+		Annotations: map[string]string{
+			annotations.KernelPath: tmpfile.Name(),
+			annotations.KernelHash: assetContentHash,
+		},
+	}
+
+	a, err := newAsset(p, imageAsset)
+	assert.Nil(err)
+	assert.Nil(a)
+
+	a, err = newAsset(p, kernelAsset)
+	assert.Nil(err)
+	assert.Equal(assetContentHash, a.computedHash)
+
+	p = &PodConfig{
+		Annotations: map[string]string{
+			annotations.KernelPath: tmpfile.Name(),
+			annotations.KernelHash: assetContentWrongHash,
+		},
+	}
+
+	a, err = newAsset(p, kernelAsset)
+	assert.NotNil(err)
+}