Sort the chart list before returning

- updatet the chart getting API
- update the corresponding UT case

Signed-off-by: Steven Zou <szou@vmware.com>

src/chartserver/chart_operator.go

@@ -5,6 +5,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"sort"
+	"strings"
 	"time"
 
 	"github.com/Masterminds/semver"
@@ -45,6 +47,7 @@ type ChartInfo struct {
 	Name          string
 	TotalVersions uint32 `json:"total_versions"`
 	Created       time.Time
+	Updated       time.Time
 	Icon          string
 	Home          string
 	Deprecated    bool
@@ -135,6 +138,16 @@ func (cho *ChartOperator) GetChartList(content []byte) ([]*ChartInfo, error) {
 		}
 	}
 
+	//Sort the chart list by the updated time which is the create time
+	//of the latest version of the chart.
+	sort.Slice(chartList, func(i, j int) bool {
+		if chartList[i].Updated.Equal(chartList[j].Updated) {
+			return strings.Compare(chartList[i].Name, chartList[j].Name) < 0
+		}
+
+		return chartList[i].Updated.After(chartList[j].Updated)
+	})
+
 	return chartList, nil
 }
 

src/chartserver/chart_operator_test.go

@@ -35,15 +35,8 @@ func TestGetChartList(t *testing.T) {
 		t.Fatalf("Length of chart list should be 2, but we got %d now", len(infos))
 	}
 
-	foundHarbor := false
-	for _, chart := range infos {
-		if chart.Name == "harbor" {
-			foundHarbor = true
-			break
-		}
-	}
-
-	if !foundHarbor {
-		t.Fatal("Expect chart named with 'harbor' but got nothing")
+	firstInSortedList := infos[0]
+	if firstInSortedList.Name != "harbor" {
+		t.Fatalf("Expect the fist item of the sorted list to be 'harbor' but got '%s'", firstInSortedList.Name)
 	}
 }