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98 lines
3.0 KiB
Go
98 lines
3.0 KiB
Go
package i2c
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import (
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"bytes"
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"encoding/binary"
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"testing"
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"gobot.io/x/gobot"
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"gobot.io/x/gobot/gobottest"
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)
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var _ gobot.Driver = (*BME280Driver)(nil)
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// --------- HELPERS
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func initTestBME280Driver() (driver *BME280Driver) {
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driver, _ = initTestBME280DriverWithStubbedAdaptor()
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return
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}
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func initTestBME280DriverWithStubbedAdaptor() (*BME280Driver, *i2cTestAdaptor) {
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adaptor := newI2cTestAdaptor()
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return NewBME280Driver(adaptor), adaptor
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}
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// --------- TESTS
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func TestNewBME280Driver(t *testing.T) {
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// Does it return a pointer to an instance of BME280Driver?
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var bme280 interface{} = NewBME280Driver(newI2cTestAdaptor())
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_, ok := bme280.(*BME280Driver)
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if !ok {
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t.Errorf("NewBME280Driver() should have returned a *BME280Driver")
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}
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}
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func TestBME280Driver(t *testing.T) {
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bme280 := initTestBME280Driver()
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gobottest.Refute(t, bme280.Connection(), nil)
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}
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func TestBME280DriverStart(t *testing.T) {
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bme280, _ := initTestBME280DriverWithStubbedAdaptor()
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gobottest.Assert(t, bme280.Start(), nil)
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}
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func TestBME280DriverHalt(t *testing.T) {
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bme280 := initTestBME280Driver()
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gobottest.Assert(t, bme280.Halt(), nil)
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}
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func TestBME280DriverMeasurements(t *testing.T) {
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bme280, adaptor := initTestBME280DriverWithStubbedAdaptor()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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buf := new(bytes.Buffer)
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// Values from the datasheet example.
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if adaptor.written[len(adaptor.written)-1] == bmp180RegisterAC1MSB {
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binary.Write(buf, binary.BigEndian, int16(408))
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binary.Write(buf, binary.BigEndian, int16(-72))
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binary.Write(buf, binary.BigEndian, int16(-14383))
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binary.Write(buf, binary.BigEndian, uint16(32741))
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binary.Write(buf, binary.BigEndian, uint16(32757))
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binary.Write(buf, binary.BigEndian, uint16(23153))
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binary.Write(buf, binary.BigEndian, int16(6190))
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binary.Write(buf, binary.BigEndian, int16(4))
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binary.Write(buf, binary.BigEndian, int16(-32768))
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binary.Write(buf, binary.BigEndian, int16(-8711))
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binary.Write(buf, binary.BigEndian, int16(2868))
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} else if adaptor.written[len(adaptor.written)-2] == bmp180CmdTemp && adaptor.written[len(adaptor.written)-1] == bmp180RegisterTempMSB {
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binary.Write(buf, binary.BigEndian, int16(27898))
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} else if adaptor.written[len(adaptor.written)-2] == bmp180CmdPressure && adaptor.written[len(adaptor.written)-1] == bmp180RegisterPressureMSB {
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binary.Write(buf, binary.BigEndian, int16(23843))
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// XLSB, not used in this test.
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buf.WriteByte(0)
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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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temp, err := bme280.Temperature()
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, temp, float32(15.0))
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pressure, err := bme280.Pressure(BMP180UltraLowPower)
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, pressure, float32(69964))
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}
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func TestBME280DriverSetName(t *testing.T) {
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b := initTestBME280Driver()
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b.SetName("TESTME")
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gobottest.Assert(t, b.Name(), "TESTME")
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}
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func TestBME280DriverOptions(t *testing.T) {
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b := NewBME280Driver(newI2cTestAdaptor(), WithBus(2))
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gobottest.Assert(t, b.GetBusOrDefault(1), 2)
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}
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