github.com/walkingsparrow/docker@v1.4.2-0.20151218153551-b708a2249bfa/integration-cli/docker_cli_pull_test.go (about) 1 package main 2 3 import ( 4 "regexp" 5 "strings" 6 "time" 7 8 "github.com/docker/distribution/digest" 9 "github.com/docker/docker/pkg/integration/checker" 10 "github.com/go-check/check" 11 ) 12 13 // TestPullFromCentralRegistry pulls an image from the central registry and verifies that the client 14 // prints all expected output. 15 func (s *DockerHubPullSuite) TestPullFromCentralRegistry(c *check.C) { 16 testRequires(c, DaemonIsLinux) 17 out := s.Cmd(c, "pull", "hello-world") 18 defer deleteImages("hello-world") 19 20 c.Assert(out, checker.Contains, "Using default tag: latest", check.Commentf("expected the 'latest' tag to be automatically assumed")) 21 c.Assert(out, checker.Contains, "Pulling from library/hello-world", check.Commentf("expected the 'library/' prefix to be automatically assumed")) 22 c.Assert(out, checker.Contains, "Downloaded newer image for hello-world:latest") 23 24 matches := regexp.MustCompile(`Digest: (.+)\n`).FindAllStringSubmatch(out, -1) 25 c.Assert(len(matches), checker.Equals, 1, check.Commentf("expected exactly one image digest in the output")) 26 c.Assert(len(matches[0]), checker.Equals, 2, check.Commentf("unexpected number of submatches for the digest")) 27 _, err := digest.ParseDigest(matches[0][1]) 28 c.Check(err, checker.IsNil, check.Commentf("invalid digest %q in output", matches[0][1])) 29 30 // We should have a single entry in images. 31 img := strings.TrimSpace(s.Cmd(c, "images")) 32 if splitImg := strings.Split(img, "\n"); len(splitImg) != 2 { 33 c.Fatalf("expected only two lines in the output of `docker images`, got %d", len(splitImg)) 34 } else if re := regexp.MustCompile(`^hello-world\s+latest`); !re.Match([]byte(splitImg[1])) { 35 c.Fatal("invalid output for `docker images` (expected image and tag name") 36 } 37 } 38 39 // TestPullNonExistingImage pulls non-existing images from the central registry, with different 40 // combinations of implicit tag and library prefix. 41 func (s *DockerHubPullSuite) TestPullNonExistingImage(c *check.C) { 42 testRequires(c, DaemonIsLinux) 43 for _, e := range []struct { 44 Repo string 45 Alias string 46 }{ 47 {"library/asdfasdf", "asdfasdf:foobar"}, 48 {"library/asdfasdf", "library/asdfasdf:foobar"}, 49 {"library/asdfasdf", "asdfasdf"}, 50 {"library/asdfasdf", "asdfasdf:latest"}, 51 {"library/asdfasdf", "library/asdfasdf"}, 52 {"library/asdfasdf", "library/asdfasdf:latest"}, 53 } { 54 out, err := s.CmdWithError("pull", e.Alias) 55 c.Assert(err, checker.NotNil, check.Commentf("expected non-zero exit status when pulling non-existing image: %s", out)) 56 // Hub returns 401 rather than 404 for nonexistent library/ repos. 57 c.Assert(out, checker.Contains, "unauthorized: access to the requested resource is not authorized", check.Commentf("expected unauthorized error message")) 58 } 59 } 60 61 // TestPullFromCentralRegistryImplicitRefParts pulls an image from the central registry and verifies 62 // that pulling the same image with different combinations of implicit elements of the the image 63 // reference (tag, repository, central registry url, ...) doesn't trigger a new pull nor leads to 64 // multiple images. 65 func (s *DockerHubPullSuite) TestPullFromCentralRegistryImplicitRefParts(c *check.C) { 66 testRequires(c, DaemonIsLinux) 67 s.Cmd(c, "pull", "hello-world") 68 defer deleteImages("hello-world") 69 70 for _, i := range []string{ 71 "hello-world", 72 "hello-world:latest", 73 "library/hello-world", 74 "library/hello-world:latest", 75 "docker.io/library/hello-world", 76 "index.docker.io/library/hello-world", 77 } { 78 out := s.Cmd(c, "pull", i) 79 c.Assert(out, checker.Contains, "Image is up to date for hello-world:latest") 80 } 81 82 // We should have a single entry in images. 83 img := strings.TrimSpace(s.Cmd(c, "images")) 84 if splitImg := strings.Split(img, "\n"); len(splitImg) != 2 { 85 c.Fatalf("expected only two lines in the output of `docker images`, got %d", len(splitImg)) 86 } else if re := regexp.MustCompile(`^hello-world\s+latest`); !re.Match([]byte(splitImg[1])) { 87 c.Fatal("invalid output for `docker images` (expected image and tag name") 88 } 89 } 90 91 // TestPullScratchNotAllowed verifies that pulling 'scratch' is rejected. 92 func (s *DockerHubPullSuite) TestPullScratchNotAllowed(c *check.C) { 93 testRequires(c, DaemonIsLinux) 94 out, err := s.CmdWithError("pull", "scratch") 95 c.Assert(err, checker.NotNil, check.Commentf("expected pull of scratch to fail")) 96 c.Assert(out, checker.Contains, "'scratch' is a reserved name") 97 c.Assert(out, checker.Not(checker.Contains), "Pulling repository scratch") 98 } 99 100 // TestPullAllTagsFromCentralRegistry pulls using `all-tags` for a given image and verifies that it 101 // results in more images than a naked pull. 102 func (s *DockerHubPullSuite) TestPullAllTagsFromCentralRegistry(c *check.C) { 103 testRequires(c, DaemonIsLinux) 104 s.Cmd(c, "pull", "busybox") 105 outImageCmd := s.Cmd(c, "images", "busybox") 106 splitOutImageCmd := strings.Split(strings.TrimSpace(outImageCmd), "\n") 107 c.Assert(splitOutImageCmd, checker.HasLen, 2, check.Commentf("expected a single entry in images\n%v", outImageCmd)) 108 109 s.Cmd(c, "pull", "--all-tags=true", "busybox") 110 outImageAllTagCmd := s.Cmd(c, "images", "busybox") 111 if linesCount := strings.Count(outImageAllTagCmd, "\n"); linesCount <= 2 { 112 c.Fatalf("pulling all tags should provide more images, got %d", linesCount-1) 113 } 114 115 // Verify that the line for 'busybox:latest' is left unchanged. 116 var latestLine string 117 for _, line := range strings.Split(outImageAllTagCmd, "\n") { 118 if strings.HasPrefix(line, "busybox") && strings.Contains(line, "latest") { 119 latestLine = line 120 break 121 } 122 } 123 c.Assert(latestLine, checker.Not(checker.Equals), "", check.Commentf("no entry for busybox:latest found after pulling all tags")) 124 splitLatest := strings.Fields(latestLine) 125 splitCurrent := strings.Fields(splitOutImageCmd[1]) 126 127 // Clear relative creation times, since these can easily change between 128 // two invocations of "docker images". Without this, the test can fail 129 // like this: 130 // ... obtained []string = []string{"busybox", "latest", "d9551b4026f0", "27", "minutes", "ago", "1.113", "MB"} 131 // ... expected []string = []string{"busybox", "latest", "d9551b4026f0", "26", "minutes", "ago", "1.113", "MB"} 132 splitLatest[3] = "" 133 splitLatest[4] = "" 134 splitLatest[5] = "" 135 splitCurrent[3] = "" 136 splitCurrent[4] = "" 137 splitCurrent[5] = "" 138 139 c.Assert(splitLatest, checker.DeepEquals, splitCurrent, check.Commentf("busybox:latest was changed after pulling all tags")) 140 } 141 142 // TestPullClientDisconnect kills the client during a pull operation and verifies that the operation 143 // gets cancelled. 144 // 145 // Ref: docker/docker#15589 146 func (s *DockerHubPullSuite) TestPullClientDisconnect(c *check.C) { 147 testRequires(c, DaemonIsLinux) 148 repoName := "hello-world:latest" 149 150 pullCmd := s.MakeCmd("pull", repoName) 151 stdout, err := pullCmd.StdoutPipe() 152 c.Assert(err, checker.IsNil) 153 err = pullCmd.Start() 154 c.Assert(err, checker.IsNil) 155 156 // Cancel as soon as we get some output. 157 buf := make([]byte, 10) 158 _, err = stdout.Read(buf) 159 c.Assert(err, checker.IsNil) 160 161 err = pullCmd.Process.Kill() 162 c.Assert(err, checker.IsNil) 163 164 time.Sleep(2 * time.Second) 165 if _, err := s.CmdWithError("inspect", repoName); err == nil { 166 c.Fatal("image was pulled after client disconnected") 167 } 168 }