mirror of
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95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
package i2c
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import (
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"errors"
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"strings"
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"testing"
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"gobot.io/x/gobot/v2"
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"gobot.io/x/gobot/v2/gobottest"
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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 = (*HMC6352Driver)(nil)
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func initTestHMC6352DriverWithStubbedAdaptor() (*HMC6352Driver, *i2cTestAdaptor) {
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a := newI2cTestAdaptor()
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d := NewHMC6352Driver(a)
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if err := d.Start(); err != nil {
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panic(err)
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}
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return d, a
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}
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func TestNewHMC6352Driver(t *testing.T) {
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var di interface{} = NewHMC6352Driver(newI2cTestAdaptor())
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d, ok := di.(*HMC6352Driver)
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if !ok {
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t.Errorf("NewHMC6352Driver() should have returned a *HMC6352Driver")
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}
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gobottest.Refute(t, d.Driver, nil)
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gobottest.Assert(t, strings.HasPrefix(d.Name(), "HMC6352"), true)
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gobottest.Assert(t, d.defaultAddress, 0x21)
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}
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func TestHMC6352Options(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 := NewHMC6352Driver(newI2cTestAdaptor(), WithBus(2))
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gobottest.Assert(t, d.GetBusOrDefault(1), 2)
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}
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func TestHMC6352Start(t *testing.T) {
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d := NewHMC6352Driver(newI2cTestAdaptor())
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gobottest.Assert(t, d.Start(), nil)
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}
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func TestHMC6352Halt(t *testing.T) {
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d, _ := initTestHMC6352DriverWithStubbedAdaptor()
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gobottest.Assert(t, d.Halt(), nil)
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}
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func TestHMC6352Heading(t *testing.T) {
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// when len(data) is 2
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d, a := initTestHMC6352DriverWithStubbedAdaptor()
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a.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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heading, _ := d.Heading()
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gobottest.Assert(t, heading, uint16(2534))
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// when len(data) is not 2
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d, a = initTestHMC6352DriverWithStubbedAdaptor()
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a.i2cReadImpl = func(b []byte) (int, error) {
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copy(b, []byte{99})
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return 1, nil
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}
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heading, err := d.Heading()
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gobottest.Assert(t, heading, uint16(0))
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gobottest.Assert(t, err, ErrNotEnoughBytes)
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// when read error
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d, a = initTestHMC6352DriverWithStubbedAdaptor()
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a.i2cReadImpl = func([]byte) (int, error) {
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return 0, errors.New("read error")
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}
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heading, err = d.Heading()
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gobottest.Assert(t, heading, uint16(0))
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gobottest.Assert(t, err, errors.New("read error"))
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// when write error
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d, a = initTestHMC6352DriverWithStubbedAdaptor()
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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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heading, err = d.Heading()
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gobottest.Assert(t, heading, uint16(0))
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gobottest.Assert(t, err, errors.New("write error"))
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}
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