}
			got = tt.left.Merge(tt.right)
			if !reflect.DeepEqual(&tt.merged, got) {
				t.Fatalf("expected %v, got %v", &tt.merged, got)
			}
		})
	}
}

func TestConcurrentMerge(t *testing.T) {
	reqA := &PushRequest{Reason: make(ReasonStats)}
	reqB := &PushRequest{Reason: NewReasonStats(ServiceUpdate, ProxyUpdate)}
	for i := 0; i < 50; i++ {
		go func() {
			reqA.CopyMerge(reqB)
		}()