use of checkers on docker_cli_rm_test.go

Signed-off-by: Yuan Sun <sunyuan3@huawei.com>

integration-cli/docker_cli_rm_test.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"strings"
 
+	"github.com/docker/docker/pkg/integration/checker"
 	"github.com/go-check/check"
 )
 
@@ -13,9 +14,8 @@ func (s *DockerSuite) TestRmContainerWithRemovedVolume(c *check.C) {
 
 	dockerCmd(c, "run", "--name", "losemyvolumes", "-v", "/tmp/testing:/test", "busybox", "true")
 
-	if err := os.Remove("/tmp/testing"); err != nil {
-		c.Fatal(err)
-	}
+	err := os.Remove("/tmp/testing")
+	c.Assert(err, check.IsNil)
 
 	dockerCmd(c, "rm", "-v", "losemyvolumes")
 }
@@ -31,9 +31,8 @@ func (s *DockerSuite) TestRmRunningContainer(c *check.C) {
 	testRequires(c, DaemonIsLinux)
 	createRunningContainer(c, "foo")
 
-	if _, _, err := dockerCmdWithError("rm", "foo"); err == nil {
-		c.Fatalf("Expected error, can't rm a running container")
-	}
+	_, _, err := dockerCmdWithError("rm", "foo")
+	c.Assert(err, checker.NotNil, check.Commentf("Expected error, can't rm a running container"))
 }
 
 func (s *DockerSuite) TestRmForceRemoveRunningContainer(c *check.C) {
@@ -55,31 +54,20 @@ func (s *DockerSuite) TestRmContainerOrphaning(c *check.C) {
 
 	// build first dockerfile
 	img1, err := buildImage(img, dockerfile1, true)
-	if err != nil {
-		c.Fatalf("Could not build image %s: %v", img, err)
-	}
+	c.Assert(err, check.IsNil, check.Commentf("Could not build image %s", img))
 	// run container on first image
-	if out, _, err := dockerCmdWithError("run", img); err != nil {
-		c.Fatalf("Could not run image %s: %v: %s", img, err, out)
-	}
-
+	dockerCmd(c, "run", img)
 	// rebuild dockerfile with a small addition at the end
-	if _, err := buildImage(img, dockerfile2, true); err != nil {
-		c.Fatalf("Could not rebuild image %s: %v", img, err)
-	}
+	_, err = buildImage(img, dockerfile2, true)
+	c.Assert(err, check.IsNil, check.Commentf("Could not rebuild image %s", img))
 	// try to remove the image, should error out.
-	if out, _, err := dockerCmdWithError("rmi", img); err == nil {
-		c.Fatalf("Expected to error out removing the image, but succeeded: %s", out)
-	}
+	out, _, err := dockerCmdWithError("rmi", img)
+	c.Assert(err, check.NotNil, check.Commentf("Expected to error out removing the image, but succeeded: %s", out))
 
 	// check if we deleted the first image
-	out, _, err := dockerCmdWithError("images", "-q", "--no-trunc")
-	if err != nil {
-		c.Fatalf("%v: %s", err, out)
-	}
-	if !strings.Contains(out, img1) {
-		c.Fatalf("Orphaned container (could not find %q in docker images): %s", img1, out)
-	}
+	out, _ = dockerCmd(c, "images", "-q", "--no-trunc")
+	c.Assert(out, checker.Contains, img1, check.Commentf("Orphaned container (could not find %q in docker images): %s", img1, out))
+
 }
 
 func (s *DockerSuite) TestRmInvalidContainer(c *check.C) {