fix tests & small code improvment

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)

api_params.go

@@ -1,14 +1,6 @@
 package docker
 
 type (
-	APIHistory struct {
-		ID        string   `json:"Id"`
-		Tags      []string `json:",omitempty"`
-		Created   int64
-		CreatedBy string `json:",omitempty"`
-		Size      int64
-	}
-
 	APITop struct {
 		Titles    []string
 		Processes [][]string

integration/api_test.go

@@ -263,12 +263,12 @@ func TestGetImagesHistory(t *testing.T) {
 	}
 	assertHttpNotError(r, t)
 
-	history := []docker.APIHistory{}
-	if err := json.Unmarshal(r.Body.Bytes(), &history); err != nil {
+	outs := engine.NewTable("Created", 0)
+	if _, err := outs.ReadFrom(r.Body); err != nil {
 		t.Fatal(err)
 	}
-	if len(history) != 1 {
-		t.Errorf("Expected 1 line, %d found", len(history))
+	if len(outs.Data) != 1 {
+		t.Errorf("Expected 1 line, %d found", len(outs.Data))
 	}
 }
 

server.go

@@ -587,7 +587,7 @@ func (srv *Server) Images(job *engine.Job) engine.Status {
 		allImages, err = srv.runtime.graph.Heads()
 	}
 	if err != nil {
-		job.Errorf("%s", err)
+		job.Error(err)
 		return engine.StatusErr
 	}
 	lookup := make(map[string]*engine.Env)
@@ -642,7 +642,7 @@ func (srv *Server) Images(job *engine.Job) engine.Status {
 
 	outs.ReverseSort()
 	if _, err := outs.WriteTo(job.Stdout); err != nil {
-		job.Errorf("%s", err)
+		job.Error(err)
 		return engine.StatusErr
 	}
 	return engine.StatusOK
@@ -735,7 +735,7 @@ func (srv *Server) ImageHistory(job *engine.Job) engine.Status {
 	})
 	outs.ReverseSort()
 	if _, err := outs.WriteTo(job.Stdout); err != nil {
-		job.Errorf("%s", err)
+		job.Error(err)
 		return engine.StatusErr
 	}
 	return engine.StatusOK