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https://github.com/hybridgroup/gobot.git
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205 lines
7.0 KiB
Go
205 lines
7.0 KiB
Go
package i2c
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import (
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"bytes"
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"errors"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"gobot.io/x/gobot/v2"
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)
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// this ensures that the implementation is based on i2c.Driver, which implements the gobot.Driver
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// and tests all implementations, so no further tests needed here for gobot.Driver interface
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var _ gobot.Driver = (*BME280Driver)(nil)
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func initTestBME280WithStubbedAdaptor() (*BME280Driver, *i2cTestAdaptor) {
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adaptor := newI2cTestAdaptor()
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return NewBME280Driver(adaptor), adaptor
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}
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func TestNewBME280Driver(t *testing.T) {
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var di interface{} = NewBME280Driver(newI2cTestAdaptor())
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d, ok := di.(*BME280Driver)
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if !ok {
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require.Fail(t, "NewBME280Driver() should have returned a *BME280Driver")
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}
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assert.NotNil(t, d.Driver)
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assert.True(t, strings.HasPrefix(d.Name(), "BMP280"))
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assert.Equal(t, 0x77, d.defaultAddress)
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assert.Equal(t, uint8(0x03), d.ctrlPwrMode)
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assert.Equal(t, BMP280PressureOversampling(0x05), d.ctrlPressOversamp)
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assert.Equal(t, BMP280TemperatureOversampling(0x01), d.ctrlTempOversamp)
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assert.Equal(t, BME280HumidityOversampling(0x05), d.ctrlHumOversamp)
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assert.Equal(t, BMP280IIRFilter(0x00), d.confFilter)
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assert.NotNil(t, d.calCoeffs)
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}
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func TestBME280Options(t *testing.T) {
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// This is a general test, that options are applied in constructor by using the common WithBus() option and
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// least one of this driver. Further tests for options can also be done by call of "WithOption(val)(d)".
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d := NewBME280Driver(newI2cTestAdaptor(), WithBus(2),
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WithBME280PressureOversampling(0x01),
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WithBME280TemperatureOversampling(0x02),
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WithBME280IIRFilter(0x03),
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WithBME280HumidityOversampling(0x04))
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assert.Equal(t, 2, d.GetBusOrDefault(1))
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assert.Equal(t, BMP280PressureOversampling(0x01), d.ctrlPressOversamp)
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assert.Equal(t, BMP280TemperatureOversampling(0x02), d.ctrlTempOversamp)
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assert.Equal(t, BMP280IIRFilter(0x03), d.confFilter)
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assert.Equal(t, BME280HumidityOversampling(0x04), d.ctrlHumOversamp)
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}
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func TestBME280Measurements(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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buf := new(bytes.Buffer)
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// Values produced by dumping data from actual sensor
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switch {
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case adaptor.written[len(adaptor.written)-1] == bmp280RegCalib00:
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buf.Write([]byte{
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126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16,
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})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH1:
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buf.Write([]byte{75})
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case adaptor.written[len(adaptor.written)-1] == bmp280RegTempData:
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buf.Write([]byte{129, 0, 0})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH2LSB:
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buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
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case adaptor.written[len(adaptor.written)-1] == bme280RegHumidityMSB:
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buf.Write([]byte{111, 83})
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}
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copy(b, buf.Bytes())
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return buf.Len(), nil
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}
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_ = bme280.Start()
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hum, err := bme280.Humidity()
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require.NoError(t, err)
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assert.InDelta(t, float32(51.20179), hum, 0.0)
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}
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func TestBME280InitH1Error(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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buf := new(bytes.Buffer)
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// Values produced by dumping data from actual sensor
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switch {
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case adaptor.written[len(adaptor.written)-1] == bmp280RegCalib00:
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buf.Write([]byte{
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126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16,
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})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH1:
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return 0, errors.New("h1 read error")
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH2LSB:
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buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
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}
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copy(b, buf.Bytes())
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return buf.Len(), nil
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}
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require.ErrorContains(t, bme280.Start(), "h1 read error")
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}
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func TestBME280InitH2Error(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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buf := new(bytes.Buffer)
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// Values produced by dumping data from actual sensor
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switch {
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case adaptor.written[len(adaptor.written)-1] == bmp280RegCalib00:
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buf.Write([]byte{
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126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16,
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})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH1:
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buf.Write([]byte{75})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH2LSB:
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return 0, errors.New("h2 read error")
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}
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copy(b, buf.Bytes())
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return buf.Len(), nil
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}
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require.ErrorContains(t, bme280.Start(), "h2 read error")
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}
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func TestBME280HumidityWriteError(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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_ = bme280.Start()
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adaptor.i2cWriteImpl = func([]byte) (int, error) {
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return 0, errors.New("write error")
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}
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hum, err := bme280.Humidity()
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require.ErrorContains(t, err, "write error")
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assert.InDelta(t, float32(0.0), hum, 0.0)
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}
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func TestBME280HumidityReadError(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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_ = bme280.Start()
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adaptor.i2cReadImpl = func([]byte) (int, error) {
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return 0, errors.New("read error")
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}
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hum, err := bme280.Humidity()
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require.ErrorContains(t, err, "read error")
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assert.InDelta(t, float32(0.0), hum, 0.0)
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}
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func TestBME280HumidityNotEnabled(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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buf := new(bytes.Buffer)
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// Values produced by dumping data from actual sensor
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switch {
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case adaptor.written[len(adaptor.written)-1] == bmp280RegCalib00:
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buf.Write([]byte{
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126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16,
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})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH1:
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buf.Write([]byte{75})
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case adaptor.written[len(adaptor.written)-1] == bmp280RegTempData:
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buf.Write([]byte{129, 0, 0})
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case adaptor.written[len(adaptor.written)-1] == bme280RegCalibDigH2LSB:
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buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
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case adaptor.written[len(adaptor.written)-1] == bme280RegHumidityMSB:
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buf.Write([]byte{0x80, 0x00})
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}
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copy(b, buf.Bytes())
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return buf.Len(), nil
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}
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_ = bme280.Start()
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hum, err := bme280.Humidity()
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require.ErrorContains(t, err, "Humidity disabled")
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assert.InDelta(t, float32(0.0), hum, 0.0)
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}
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func TestBME280_initializationBME280(t *testing.T) {
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bme280, adaptor := initTestBME280WithStubbedAdaptor()
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readCallCounter := 0
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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readCallCounter++
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if readCallCounter == 1 {
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// Simulate returning 24 bytes for the coefficients (register bmp280RegCalib00)
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return 24, nil
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}
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if readCallCounter == 2 {
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// Simulate returning a single byte for the hc.h1 value (register bme280RegCalibDigH1)
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return 1, nil
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}
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if readCallCounter == 3 {
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// Simulate returning 7 bytes for the coefficients (register bme280RegCalibDigH2LSB)
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return 7, nil
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}
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if readCallCounter == 4 {
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// Simulate returning 1 byte for the cmr (register bmp280RegControl)
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return 1, nil
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}
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return 0, nil
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}
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require.NoError(t, bme280.Start())
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}
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