func TestFormattingOfTemperaturesOutOfRangeLow(t *testing.T) {
    th := Thermostat{Measured: "1", Saving: "2", Goal: "3", Comfort: "16"}
    assert.Equal(t, "8", th.FmtMeasuredTemperature())
    assert.Equal(t, "8", th.FmtSavingTemperature())
    assert.Equal(t, "8", th.FmtGoalTemperature())