kubectl: move events sorting interface to the api for general use

pkg/api/events/sorted_event_list.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+)
+
+// SortableEvents implements sort.Interface for []api.Event based on the Timestamp field
+type SortableEvents []api.Event
+
+func (list SortableEvents) Len() int {
+	return len(list)
+}
+
+func (list SortableEvents) Swap(i, j int) {
+	list[i], list[j] = list[j], list[i]
+}
+
+func (list SortableEvents) Less(i, j int) bool {
+	return list[i].LastTimestamp.Time.Before(list[j].LastTimestamp.Time)
+}

pkg/api/events/sorted_event_list_test.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"sort"
+	"testing"
+	"time"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+)
+
+func TestSortableEvents(t *testing.T) {
+	// Arrange
+	list := SortableEvents([]api.Event{
+		{
+			Source:         api.EventSource{Component: "kubelet"},
+			Message:        "Item 1",
+			FirstTimestamp: unversioned.NewTime(time.Date(2014, time.January, 15, 0, 0, 0, 0, time.UTC)),
+			LastTimestamp:  unversioned.NewTime(time.Date(2014, time.January, 15, 0, 0, 0, 0, time.UTC)),
+			Count:          1,
+			Type:           api.EventTypeNormal,
+		},
+		{
+			Source:         api.EventSource{Component: "scheduler"},
+			Message:        "Item 2",
+			FirstTimestamp: unversioned.NewTime(time.Date(1987, time.June, 17, 0, 0, 0, 0, time.UTC)),
+			LastTimestamp:  unversioned.NewTime(time.Date(1987, time.June, 17, 0, 0, 0, 0, time.UTC)),
+			Count:          1,
+			Type:           api.EventTypeNormal,
+		},
+		{
+			Source:         api.EventSource{Component: "kubelet"},
+			Message:        "Item 3",
+			FirstTimestamp: unversioned.NewTime(time.Date(2002, time.December, 25, 0, 0, 0, 0, time.UTC)),
+			LastTimestamp:  unversioned.NewTime(time.Date(2002, time.December, 25, 0, 0, 0, 0, time.UTC)),
+			Count:          1,
+			Type:           api.EventTypeNormal,
+		},
+	})
+
+	// Act
+	sort.Sort(list)
+
+	// Assert
+	if list[0].Message != "Item 2" ||
+		list[1].Message != "Item 3" ||
+		list[2].Message != "Item 1" {
+		t.Fatal("List is not sorted by time. List: ", list)
+	}
+}