Convert a legacy integration test to a clean v2 CLI integration test.

Docker-DCO-1.1-Signed-off-by: Solomon Hykes <solomon@docker.com> (github: shykes)

integration-cli/docker_cli_images_test.go

@@ -18,3 +18,41 @@ func TestImagesEnsureImageIsListed(t *testing.T) {
 
 	logDone("images - busybox should be listed")
 }
+
+func TestCLIImageTagRemove(t *testing.T) {
+	imagesBefore, _, _ := cmd(t, "images", "-a")
+	cmd(t, "tag", "busybox", "utest:tag1")
+	cmd(t, "tag", "busybox", "utest/docker:tag2")
+	cmd(t, "tag", "busybox", "utest:5000/docker:tag3")
+	{
+		imagesAfter, _, _ := cmd(t, "images", "-a")
+		if nLines(imagesAfter) != nLines(imagesBefore)+3 {
+			t.Fatalf("before: %#s\n\nafter: %#s\n", imagesBefore, imagesAfter)
+		}
+	}
+	cmd(t, "rmi", "utest/docker:tag2")
+	{
+		imagesAfter, _, _ := cmd(t, "images", "-a")
+		if nLines(imagesAfter) != nLines(imagesBefore)+2 {
+			t.Fatalf("before: %#s\n\nafter: %#s\n", imagesBefore, imagesAfter)
+		}
+
+	}
+	cmd(t, "rmi", "utest:5000/docker:tag3")
+	{
+		imagesAfter, _, _ := cmd(t, "images", "-a")
+		if nLines(imagesAfter) != nLines(imagesBefore)+1 {
+			t.Fatalf("before: %#s\n\nafter: %#s\n", imagesBefore, imagesAfter)
+		}
+
+	}
+	cmd(t, "rmi", "utest:tag1")
+	{
+		imagesAfter, _, _ := cmd(t, "images", "-a")
+		if nLines(imagesAfter) != nLines(imagesBefore)+0 {
+			t.Fatalf("before: %#s\n\nafter: %#s\n", imagesBefore, imagesAfter)
+		}
+
+	}
+	logDone("tag,rmi- tagging the same images multiple times then removing tags")
+}

integration-cli/docker_utils.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os/exec"
 	"strings"
+	"testing"
 )
 
 func deleteContainer(container string) error {
@@ -54,3 +55,9 @@ func deleteImages(images string) error {
 
 	return err
 }
+
+func cmd(t *testing.T, args ...string) (string, int, error) {
+	out, status, err := runCommandWithOutput(exec.Command(dockerBinary, args...))
+	errorOut(err, t, fmt.Sprintf("'%s' failed with errors: %v (%v)", strings.Join(args, " "), err, out))
+	return out, status, err
+}

integration-cli/utils.go

@@ -107,3 +107,7 @@ func errorOutOnNonNilError(err error, t *testing.T, message string) {
 		t.Fatalf(message)
 	}
 }
+
+func nLines(s string) int {
+	return strings.Count(s, "\n")
+}