github.com/stackdocker/rkt@v0.10.1-0.20151109095037-1aa827478248/tests/rkt_image_export_test.go (about)

     1  // Copyright 2015 The rkt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"fmt"
    19  	"io/ioutil"
    20  	"os"
    21  	"path/filepath"
    22  	"strings"
    23  	"testing"
    24  
    25  	"github.com/coreos/rkt/tests/testutils"
    26  )
    27  
    28  const (
    29  	manifestExportTemplate = `{"acKind":"ImageManifest","acVersion":"0.7.1","name":"IMG_NAME","labels":[{"name":"version","value":"1.0.0"},{"name":"arch","value":"amd64"},{"name":"os","value":"linux"}],"app":{"exec":["/inspect"],"user":"0","group":"0","workingDirectory":"/","environment":[{"name":"VAR_FROM_MANIFEST","value":"manifest"}]}}`
    30  )
    31  
    32  // TestImageExport tests 'rkt image export', it will import some existing
    33  // image, export it with rkt image export and check that the exported ACI hash
    34  // matches the hash of the imported ACI
    35  func TestImageExport(t *testing.T) {
    36  	testImageName := "coreos.com/rkt-image-export-test"
    37  	expectManifest := strings.Replace(manifestExportTemplate, "IMG_NAME", testImageName, -1)
    38  
    39  	tmpDir := createTempDirOrPanic("rkt-TestImageExport-")
    40  	defer os.RemoveAll(tmpDir)
    41  
    42  	tmpManifest, err := ioutil.TempFile(tmpDir, "manifest")
    43  	if err != nil {
    44  		panic(fmt.Sprintf("Cannot create temp manifest: %v", err))
    45  	}
    46  	defer tmpManifest.Close()
    47  	tmpManifestName := tmpManifest.Name()
    48  	if err := ioutil.WriteFile(tmpManifestName, []byte(expectManifest), 0600); err != nil {
    49  		panic(fmt.Sprintf("Cannot write to temp manifest: %v", err))
    50  	}
    51  	defer os.Remove(tmpManifestName)
    52  
    53  	testImage := patchTestACI("rkt-inspect-image-export.aci", "--manifest", tmpManifestName)
    54  	defer os.Remove(testImage)
    55  	ctx := testutils.NewRktRunCtx()
    56  	defer ctx.Cleanup()
    57  
    58  	testImageId := importImageAndFetchHash(t, ctx, testImage)
    59  
    60  	testImageHash, err := getHash(testImage)
    61  	if err != nil {
    62  		panic(fmt.Sprintf("Error getting image hash: %v", err))
    63  	}
    64  
    65  	tests := []struct {
    66  		image        string
    67  		shouldFind   bool
    68  		expectedHash string
    69  	}{
    70  		{
    71  			testImageName,
    72  			true,
    73  			testImageHash,
    74  		},
    75  		{
    76  			testImageId,
    77  			true,
    78  			testImageHash,
    79  		},
    80  		{
    81  			"sha512-not-existed",
    82  			false,
    83  			"",
    84  		},
    85  		{
    86  			"some~random~aci~name",
    87  			false,
    88  			"",
    89  		},
    90  	}
    91  
    92  	for i, tt := range tests {
    93  		outputAciPath := filepath.Join(tmpDir, fmt.Sprintf("exported-%d.aci", i))
    94  		runCmd := fmt.Sprintf("%s image export %s %s", ctx.Cmd(), tt.image, outputAciPath)
    95  		t.Logf("Running 'image export' test #%v: %v", i, runCmd)
    96  		spawnAndWaitOrFail(t, runCmd, tt.shouldFind)
    97  
    98  		if !tt.shouldFind {
    99  			continue
   100  		}
   101  
   102  		exportedHash, err := getHash(outputAciPath)
   103  		if err != nil {
   104  			t.Fatalf("Error getting exported image hash: %v", err)
   105  		}
   106  
   107  		if exportedHash != tt.expectedHash {
   108  			t.Fatalf("Expected hash %q but got %s", tt.expectedHash, exportedHash)
   109  		}
   110  	}
   111  }