Allow for configuring MinWatchTimeout in Reflector and Informer.

Kubernetes-commit: 29e38c19b853b6cc3950541b1727395acf5eb4d3

tools/cache/reflector_test.go

@@ -1091,6 +1091,67 @@ func TestGetExpectedGVKFromObject(t *testing.T) {
 	}
 }
 
+func TestWatchTimeout(t *testing.T) {
+
+	testCases := []struct {
+		name                      string
+		minWatchTimeout           time.Duration
+		expectedMinTimeoutSeconds int64
+	}{
+		{
+			name:                      "no timeout",
+			expectedMinTimeoutSeconds: 5 * 60,
+		},
+		{
+			name:                      "small timeout not honored",
+			minWatchTimeout:           time.Second,
+			expectedMinTimeoutSeconds: 5 * 60,
+		},
+		{
+			name:                      "30m timeout",
+			minWatchTimeout:           30 * time.Minute,
+			expectedMinTimeoutSeconds: 30 * 60,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			stopCh := make(chan struct{})
+			s := NewStore(MetaNamespaceKeyFunc)
+			var gotTimeoutSeconds int64
+
+			lw := &testLW{
+				ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+					return &v1.PodList{ListMeta: metav1.ListMeta{ResourceVersion: "10"}}, nil
+				},
+				WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+					if options.TimeoutSeconds != nil {
+						gotTimeoutSeconds = *options.TimeoutSeconds
+					}
+
+					// Stop once the reflector begins watching since we're only interested in the list.
+					close(stopCh)
+					return watch.NewFake(), nil
+				},
+			}
+
+			opts := ReflectorOptions{
+				MinWatchTimeout: tc.minWatchTimeout,
+			}
+			r := NewReflectorWithOptions(lw, &v1.Pod{}, s, opts)
+			if err := r.ListAndWatch(stopCh); err != nil {
+				t.Fatal(err)
+			}
+
+			minExpected := tc.expectedMinTimeoutSeconds
+			maxExpected := 2 * tc.expectedMinTimeoutSeconds
+			if gotTimeoutSeconds < minExpected || gotTimeoutSeconds > maxExpected {
+				t.Errorf("unexpected TimeoutSecond, got %v, expected in [%v, %v]", gotTimeoutSeconds, minExpected, maxExpected)
+			}
+		})
+	}
+}
+
 type storeWithRV struct {
 	Store