github.com/rita33cool1/iot-system-gateway@v0.0.0-20200911033302-e65bde238cc5/docker-engine/integration/build/build_squash_test.go (about)

     1  package build
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"io"
     7  	"io/ioutil"
     8  	"strings"
     9  	"testing"
    10  
    11  	"github.com/docker/docker/api/types"
    12  	"github.com/docker/docker/integration/internal/container"
    13  	"github.com/docker/docker/internal/test/daemon"
    14  	"github.com/docker/docker/internal/test/fakecontext"
    15  	"github.com/docker/docker/pkg/stdcopy"
    16  	"github.com/gotestyourself/gotestyourself/assert"
    17  	is "github.com/gotestyourself/gotestyourself/assert/cmp"
    18  )
    19  
    20  func TestBuildSquashParent(t *testing.T) {
    21  	d := daemon.New(t, daemon.WithExperimental)
    22  	d.StartWithBusybox(t)
    23  	defer d.Stop(t)
    24  
    25  	client, err := d.NewClient()
    26  	assert.NilError(t, err)
    27  
    28  	dockerfile := `
    29  		FROM busybox
    30  		RUN echo hello > /hello
    31  		RUN echo world >> /hello
    32  		RUN echo hello > /remove_me
    33  		ENV HELLO world
    34  		RUN rm /remove_me
    35  		`
    36  
    37  	// build and get the ID that we can use later for history comparison
    38  	ctx := context.Background()
    39  	source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
    40  	defer source.Close()
    41  
    42  	name := "test"
    43  	resp, err := client.ImageBuild(ctx,
    44  		source.AsTarReader(t),
    45  		types.ImageBuildOptions{
    46  			Remove:      true,
    47  			ForceRemove: true,
    48  			Tags:        []string{name},
    49  		})
    50  	assert.NilError(t, err)
    51  	_, err = io.Copy(ioutil.Discard, resp.Body)
    52  	resp.Body.Close()
    53  	assert.NilError(t, err)
    54  
    55  	inspect, _, err := client.ImageInspectWithRaw(ctx, name)
    56  	assert.NilError(t, err)
    57  	origID := inspect.ID
    58  
    59  	// build with squash
    60  	resp, err = client.ImageBuild(ctx,
    61  		source.AsTarReader(t),
    62  		types.ImageBuildOptions{
    63  			Remove:      true,
    64  			ForceRemove: true,
    65  			Squash:      true,
    66  			Tags:        []string{name},
    67  		})
    68  	assert.NilError(t, err)
    69  	_, err = io.Copy(ioutil.Discard, resp.Body)
    70  	resp.Body.Close()
    71  	assert.NilError(t, err)
    72  
    73  	cid := container.Run(t, ctx, client,
    74  		container.WithImage(name),
    75  		container.WithCmd("/bin/sh", "-c", "cat /hello"),
    76  	)
    77  	reader, err := client.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
    78  		ShowStdout: true,
    79  	})
    80  	assert.NilError(t, err)
    81  
    82  	actualStdout := new(bytes.Buffer)
    83  	actualStderr := ioutil.Discard
    84  	_, err = stdcopy.StdCopy(actualStdout, actualStderr, reader)
    85  	assert.NilError(t, err)
    86  	assert.Check(t, is.Equal(strings.TrimSpace(actualStdout.String()), "hello\nworld"))
    87  
    88  	container.Run(t, ctx, client,
    89  		container.WithImage(name),
    90  		container.WithCmd("/bin/sh", "-c", "[ ! -f /remove_me ]"),
    91  	)
    92  	container.Run(t, ctx, client,
    93  		container.WithImage(name),
    94  		container.WithCmd("/bin/sh", "-c", `[ "$(echo $HELLO)" == "world" ]`),
    95  	)
    96  
    97  	origHistory, err := client.ImageHistory(ctx, origID)
    98  	assert.NilError(t, err)
    99  	testHistory, err := client.ImageHistory(ctx, name)
   100  	assert.NilError(t, err)
   101  
   102  	inspect, _, err = client.ImageInspectWithRaw(ctx, name)
   103  	assert.NilError(t, err)
   104  	assert.Check(t, is.Len(testHistory, len(origHistory)+1))
   105  	assert.Check(t, is.Len(inspect.RootFS.Layers, 2))
   106  }