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bme280_driver_test.go
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package i2c
import (
"bytes"
"errors"
"testing"
"gobot.io/x/gobot"
"gobot.io/x/gobot/gobottest"
)
var _ gobot.Driver = (*BME280Driver)(nil)
// --------- HELPERS
func initTestBME280Driver() (driver *BME280Driver) {
driver, _ = initTestBME280DriverWithStubbedAdaptor()
return
}
func initTestBME280DriverWithStubbedAdaptor() (*BME280Driver, *i2cTestAdaptor) {
adaptor := newI2cTestAdaptor()
return NewBME280Driver(adaptor), adaptor
}
// --------- TESTS
func TestNewBME280Driver(t *testing.T) {
// Does it return a pointer to an instance of BME280Driver?
var bme280 interface{} = NewBME280Driver(newI2cTestAdaptor())
_, ok := bme280.(*BME280Driver)
if !ok {
t.Errorf("NewBME280Driver() should have returned a *BME280Driver")
}
}
func TestBME280Driver(t *testing.T) {
bme280 := initTestBME280Driver()
gobottest.Refute(t, bme280.Connection(), nil)
}
func TestBME280DriverStart(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
// Simulate returning a single byte for the
// ReadByteData(bmp280RegisterControl) call in Start()
return 1, nil
}
gobottest.Assert(t, bme280.Start(), nil)
}
func TestBME280StartConnectError(t *testing.T) {
d, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.Testi2cConnectErr(true)
gobottest.Assert(t, d.Start(), errors.New("Invalid i2c connection"))
}
func TestBME280DriverStartWriteError(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cWriteImpl = func([]byte) (int, error) {
return 0, errors.New("write error")
}
gobottest.Assert(t, bme280.Start(), errors.New("write error"))
}
func TestBME280DriverStartReadError(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
return 0, errors.New("read error")
}
gobottest.Assert(t, bme280.Start(), errors.New("read error"))
}
func TestBME280DriverHalt(t *testing.T) {
bme280 := initTestBME280Driver()
gobottest.Assert(t, bme280.Halt(), nil)
}
func TestBME280DriverMeasurements(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
buf := new(bytes.Buffer)
// Values produced by dumping data from actual sensor
if adaptor.written[len(adaptor.written)-1] == bmp280RegisterCalib00 {
buf.Write([]byte{126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH1 {
buf.Write([]byte{75})
} else if adaptor.written[len(adaptor.written)-1] == bmp280RegisterTempData {
buf.Write([]byte{129, 0, 0})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH2LSB {
buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterHumidityMSB {
buf.Write([]byte{111, 83})
}
copy(b, buf.Bytes())
return buf.Len(), nil
}
bme280.Start()
hum, err := bme280.Humidity()
gobottest.Assert(t, err, nil)
gobottest.Assert(t, hum, float32(51.20179))
}
func TestBME280DriverInitH1Error(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
buf := new(bytes.Buffer)
// Values produced by dumping data from actual sensor
if adaptor.written[len(adaptor.written)-1] == bmp280RegisterCalib00 {
buf.Write([]byte{126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH1 {
return 0, errors.New("h1 read error")
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH2LSB {
buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
}
copy(b, buf.Bytes())
return buf.Len(), nil
}
gobottest.Assert(t, bme280.Start(), errors.New("h1 read error"))
}
func TestBME280DriverInitH2Error(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
buf := new(bytes.Buffer)
// Values produced by dumping data from actual sensor
if adaptor.written[len(adaptor.written)-1] == bmp280RegisterCalib00 {
buf.Write([]byte{126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH1 {
buf.Write([]byte{75})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH2LSB {
return 0, errors.New("h2 read error")
}
copy(b, buf.Bytes())
return buf.Len(), nil
}
gobottest.Assert(t, bme280.Start(), errors.New("h2 read error"))
}
func TestBME280DriverHumidityWriteError(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
bme280.Start()
adaptor.i2cWriteImpl = func([]byte) (int, error) {
return 0, errors.New("write error")
}
hum, err := bme280.Humidity()
gobottest.Assert(t, err, errors.New("write error"))
gobottest.Assert(t, hum, float32(0.0))
}
func TestBME280DriverHumidityReadError(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
bme280.Start()
adaptor.i2cReadImpl = func([]byte) (int, error) {
return 0, errors.New("read error")
}
hum, err := bme280.Humidity()
gobottest.Assert(t, err, errors.New("read error"))
gobottest.Assert(t, hum, float32(0.0))
}
func TestBME280DriverHumidityNotEnabled(t *testing.T) {
bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
adaptor.i2cReadImpl = func(b []byte) (int, error) {
buf := new(bytes.Buffer)
// Values produced by dumping data from actual sensor
if adaptor.written[len(adaptor.written)-1] == bmp280RegisterCalib00 {
buf.Write([]byte{126, 109, 214, 102, 50, 0, 54, 149, 220, 213, 208, 11, 64, 30, 166, 255, 249, 255, 172, 38, 10, 216, 189, 16})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH1 {
buf.Write([]byte{75})
} else if adaptor.written[len(adaptor.written)-1] == bmp280RegisterTempData {
buf.Write([]byte{129, 0, 0})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterCalibDigH2LSB {
buf.Write([]byte{112, 1, 0, 19, 1, 0, 30})
} else if adaptor.written[len(adaptor.written)-1] == bme280RegisterHumidityMSB {
buf.Write([]byte{0x80, 0x00})
}
copy(b, buf.Bytes())
return buf.Len(), nil
}
bme280.Start()
hum, err := bme280.Humidity()
gobottest.Assert(t, err, errors.New("Humidity disabled"))
gobottest.Assert(t, hum, float32(0.0))
}
func TestBME280DriverSetName(t *testing.T) {
b := initTestBME280Driver()
b.SetName("TESTME")
gobottest.Assert(t, b.Name(), "TESTME")
}
func TestBME280DriverOptions(t *testing.T) {
b := NewBME280Driver(newI2cTestAdaptor(), WithBus(2))
gobottest.Assert(t, b.GetBusOrDefault(1), 2)
}