Use of checkers on docker_cli_history_test.go

Signed-off-by: James Carey <jecarey@us.ibm.com>

integration-cli/docker_cli_history_test.go

@@ -6,6 +6,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/docker/docker/pkg/integration/checker"
 	"github.com/go-check/check"
 )
 
@@ -43,9 +44,7 @@ RUN echo "Y"
 RUN echo "Z"`,
 		true)
 
-	if err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
 
 	out, _ := dockerCmd(c, "history", "testbuildhistory")
 	actualValues := strings.Split(out, "\n")[1:27]
@@ -54,10 +53,7 @@ RUN echo "Z"`,
 	for i := 0; i < 26; i++ {
 		echoValue := fmt.Sprintf("echo \"%s\"", expectedValues[i])
 		actualValue := actualValues[i]
-
-		if !strings.Contains(actualValue, echoValue) {
-			c.Fatalf("Expected layer \"%s\", but was: %s", expectedValues[i], actualValue)
-		}
+		c.Assert(actualValue, checker.Contains, echoValue)
 	}
 
 }
@@ -69,9 +65,7 @@ func (s *DockerSuite) TestHistoryExistentImage(c *check.C) {
 
 func (s *DockerSuite) TestHistoryNonExistentImage(c *check.C) {
 	_, _, err := dockerCmdWithError("history", "testHistoryNonExistentImage")
-	if err == nil {
-		c.Fatal("history on a non-existent image should fail.")
-	}
+	c.Assert(err, checker.NotNil, check.Commentf("history on a non-existent image should fail."))
 }
 
 func (s *DockerSuite) TestHistoryImageWithComment(c *check.C) {
@@ -91,10 +85,7 @@ func (s *DockerSuite) TestHistoryImageWithComment(c *check.C) {
 	out, _ := dockerCmd(c, "history", name)
 	outputTabs := strings.Fields(strings.Split(out, "\n")[1])
 	actualValue := outputTabs[len(outputTabs)-1]
-
-	if !strings.Contains(actualValue, comment) {
-		c.Fatalf("Expected comments %q, but found %q", comment, actualValue)
-	}
+	c.Assert(actualValue, checker.Contains, comment)
 }
 
 func (s *DockerSuite) TestHistoryHumanOptionFalse(c *check.C) {
@@ -110,9 +101,9 @@ func (s *DockerSuite) TestHistoryHumanOptionFalse(c *check.C) {
 			endIndex = len(lines[i])
 		}
 		sizeString := lines[i][startIndex:endIndex]
-		if _, err := strconv.Atoi(strings.TrimSpace(sizeString)); err != nil {
-			c.Fatalf("The size '%s' was not an Integer", sizeString)
-		}
+
+		_, err := strconv.Atoi(strings.TrimSpace(sizeString))
+		c.Assert(err, checker.IsNil, check.Commentf("The size '%s' was not an Integer", sizeString))
 	}
 }
 
@@ -121,7 +112,7 @@ func (s *DockerSuite) TestHistoryHumanOptionTrue(c *check.C) {
 	out, _ := dockerCmd(c, "history", "--human=true", "busybox")
 	lines := strings.Split(out, "\n")
 	sizeColumnRegex, _ := regexp.Compile("SIZE +")
-	humanSizeRegex, _ := regexp.Compile("^\\d+.*B$") // Matches human sizes like 10 MB, 3.2 KB, etc
+	humanSizeRegexRaw := "\\d+.*B" // Matches human sizes like 10 MB, 3.2 KB, etc
 	indices := sizeColumnRegex.FindStringIndex(lines[0])
 	startIndex := indices[0]
 	endIndex := indices[1]
@@ -130,8 +121,6 @@ func (s *DockerSuite) TestHistoryHumanOptionTrue(c *check.C) {
 			endIndex = len(lines[i])
 		}
 		sizeString := lines[i][startIndex:endIndex]
-		if matchSuccess := humanSizeRegex.MatchString(strings.TrimSpace(sizeString)); !matchSuccess {
-			c.Fatalf("The size '%s' was not in human format", sizeString)
-		}
+		c.Assert(strings.TrimSpace(sizeString), checker.Matches, humanSizeRegexRaw, check.Commentf("The size '%s' was not in human format", sizeString))
 	}
 }