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Add integration test for build —cache-from

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Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2016-09-22 14:32:17 -07:00
parent 690882c2e7
commit 4b8e680bcc
1 changed files with 93 additions and 0 deletions
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93
integration-cli/docker_cli_build_test.go
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@ -6931,3 +6931,96 @@ func (s *DockerSuite) TestBuildWithFailure(c *check.C) {
c.Assert(stdout, checker.Not(checker.Contains), "Step 1/2 : FROM busybox")
c.Assert(stdout, checker.Not(checker.Contains), "Step 2/2 : RUN nobody")
}
func (s *DockerSuite) TestBuildCacheFrom(c *check.C) {
testRequires(c, DaemonIsLinux) // All tests that do save are skipped in windows
dockerfile := `
FROM busybox
ENV FOO=bar
ADD baz /
RUN touch bax`
ctx, err := fakeContext(dockerfile, map[string]string{
"Dockerfile": dockerfile,
"baz": "baz",
})
c.Assert(err, checker.IsNil)
defer ctx.Close()
id1, err := buildImageFromContext("build1", ctx, true)
c.Assert(err, checker.IsNil)
// rebuild with cache-from
id2, out, err := buildImageFromContextWithOut("build2", ctx, true, "--cache-from=build1")
c.Assert(err, checker.IsNil)
c.Assert(id1, checker.Equals, id2)
c.Assert(strings.Count(out, "Using cache"), checker.Equals, 3)
dockerCmd(c, "rmi", "build2")
// no cache match with unknown source
id2, out, err = buildImageFromContextWithOut("build2", ctx, true, "--cache-from=nosuchtag")
c.Assert(err, checker.IsNil)
c.Assert(id1, checker.Not(checker.Equals), id2)
c.Assert(strings.Count(out, "Using cache"), checker.Equals, 0)
dockerCmd(c, "rmi", "build2")
// clear parent images
tempDir, err := ioutil.TempDir("", "test-build-cache-from-")
if err != nil {
c.Fatalf("failed to create temporary directory: %s", tempDir)
}
defer os.RemoveAll(tempDir)
tempFile := filepath.Join(tempDir, "img.tar")
dockerCmd(c, "save", "-o", tempFile, "build1")
dockerCmd(c, "rmi", "build1")
dockerCmd(c, "load", "-i", tempFile)
parentID, _ := dockerCmd(c, "inspect", "-f", "{{.Parent}}", "build1")
c.Assert(strings.TrimSpace(parentID), checker.Equals, "")
// cache still applies without parents
id2, out, err = buildImageFromContextWithOut("build2", ctx, true, "--cache-from=build1")
c.Assert(err, checker.IsNil)
c.Assert(id1, checker.Equals, id2)
c.Assert(strings.Count(out, "Using cache"), checker.Equals, 3)
history1, _ := dockerCmd(c, "history", "-q", "build2")
// Retry, no new intermediate images
id3, out, err := buildImageFromContextWithOut("build3", ctx, true, "--cache-from=build1")
c.Assert(err, checker.IsNil)
c.Assert(id1, checker.Equals, id3)
c.Assert(strings.Count(out, "Using cache"), checker.Equals, 3)
history2, _ := dockerCmd(c, "history", "-q", "build3")
c.Assert(history1, checker.Equals, history2)
dockerCmd(c, "rmi", "build2")
dockerCmd(c, "rmi", "build3")
dockerCmd(c, "rmi", "build1")
dockerCmd(c, "load", "-i", tempFile)
// Modify file, everything up to last command and layers are reused
dockerfile = `
FROM busybox
ENV FOO=bar
ADD baz /
RUN touch newfile`
err = ioutil.WriteFile(filepath.Join(ctx.Dir, "Dockerfile"), []byte(dockerfile), 0644)
c.Assert(err, checker.IsNil)
id2, out, err = buildImageFromContextWithOut("build2", ctx, true, "--cache-from=build1")
c.Assert(err, checker.IsNil)
c.Assert(id1, checker.Not(checker.Equals), id2)
c.Assert(strings.Count(out, "Using cache"), checker.Equals, 2)
layers1Str, _ := dockerCmd(c, "inspect", "-f", "{{json .RootFS.Layers}}", "build1")
layers2Str, _ := dockerCmd(c, "inspect", "-f", "{{json .RootFS.Layers}}", "build2")
var layers1 []string
var layers2 []string
c.Assert(json.Unmarshal([]byte(layers1Str), &layers1), checker.IsNil)
c.Assert(json.Unmarshal([]byte(layers2Str), &layers2), checker.IsNil)
c.Assert(len(layers1), checker.Equals, len(layers2))
for i := 0; i < len(layers1)-1; i++ {
c.Assert(layers1[i], checker.Equals, layers2[i])
}
c.Assert(layers1[len(layers1)-1], checker.Not(checker.Equals), layers2[len(layers1)-1])
}