mirror of
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135 lines
3.4 KiB
Go
135 lines
3.4 KiB
Go
package i2c
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import (
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"errors"
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"testing"
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"gobot.io/x/gobot"
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"gobot.io/x/gobot/drivers/aio"
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"gobot.io/x/gobot/gobottest"
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)
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// the ADS1015Driver is a Driver
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var _ gobot.Driver = (*ADS1015Driver)(nil)
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// that supports the AnalogReader interface
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var _ aio.AnalogReader = (*ADS1015Driver)(nil)
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// --------- HELPERS
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func initTestADS1015Driver() (driver *ADS1015Driver) {
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driver, _ = initTestADS1015DriverWithStubbedAdaptor()
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return
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}
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func initTestADS1015DriverWithStubbedAdaptor() (*ADS1015Driver, *i2cTestAdaptor) {
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adaptor := newI2cTestAdaptor()
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return NewADS1015Driver(adaptor), adaptor
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}
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// --------- BASE TESTS
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func TestNewADS1015Driver(t *testing.T) {
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// Does it return a pointer to an instance of ADS1015Driver?
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var bm interface{} = NewADS1015Driver(newI2cTestAdaptor())
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_, ok := bm.(*ADS1015Driver)
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if !ok {
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t.Errorf("NewADS1015Driver() should have returned a *ADS1015Driver")
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}
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}
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func TestADS1015DriverSetName(t *testing.T) {
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d := initTestADS1015Driver()
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d.SetName("TESTME")
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gobottest.Assert(t, d.Name(), "TESTME")
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}
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func TestADS1015DriverOptions(t *testing.T) {
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d := NewADS1015Driver(newI2cTestAdaptor(), WithBus(2), WithADS1015Gain(ADS1015RegConfigPga2048V))
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gobottest.Assert(t, d.GetBusOrDefault(1), 2)
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gobottest.Assert(t, d.gain, uint16(ADS1015RegConfigPga2048V))
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}
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func TestADS1015StartAndHalt(t *testing.T) {
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d, _ := initTestADS1015DriverWithStubbedAdaptor()
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gobottest.Assert(t, d.Start(), nil)
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gobottest.Assert(t, d.Halt(), nil)
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}
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func TestADS1015StartConnectError(t *testing.T) {
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d, adaptor := initTestADS1015DriverWithStubbedAdaptor()
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adaptor.Testi2cConnectErr(true)
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gobottest.Assert(t, d.Start(), errors.New("Invalid i2c connection"))
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}
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// --------- DRIVER SPECIFIC TESTS
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func TestADS1015DriverAnalogRead(t *testing.T) {
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d, adaptor := initTestADS1015DriverWithStubbedAdaptor()
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d.Start()
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adaptor.i2cReadImpl = func(b []byte) (int, error) {
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copy(b, []byte{99, 1})
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return 2, nil
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}
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val, err := d.AnalogRead("0")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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val, err = d.AnalogRead("1")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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val, err = d.AnalogRead("2")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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val, err = d.AnalogRead("3")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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val, err = d.AnalogRead("0-1")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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val, err = d.AnalogRead("2-3")
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gobottest.Assert(t, val, 1584)
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gobottest.Assert(t, err, nil)
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}
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func TestADS1015DriverAnalogReadError(t *testing.T) {
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d, a := initTestADS1015DriverWithStubbedAdaptor()
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d.Start()
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a.i2cReadImpl = func(b []byte) (int, error) {
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return 0, errors.New("read error")
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}
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_, err := d.AnalogRead("0")
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gobottest.Assert(t, err, errors.New("read error"))
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}
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func TestADS1015DriverAnalogReadInvalidPin(t *testing.T) {
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d, _ := initTestADS1015DriverWithStubbedAdaptor()
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_, err := d.AnalogRead("99")
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gobottest.Assert(t, err, errors.New("Invalid channel."))
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}
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func TestADS1015DriverAnalogReadWriteError(t *testing.T) {
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d, a := initTestADS1015DriverWithStubbedAdaptor()
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d.Start()
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a.i2cWriteImpl = func([]byte) (int, error) {
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return 0, errors.New("write error")
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}
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_, err := d.AnalogRead("0")
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gobottest.Assert(t, err, errors.New("write error"))
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_, err = d.AnalogRead("0-1")
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gobottest.Assert(t, err, errors.New("write error"))
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_, err = d.AnalogRead("2-3")
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gobottest.Assert(t, err, errors.New("write error"))
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}
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