105 lines
2.4 KiB
Go
105 lines
2.4 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/gobottest"
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)
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// --------- HELPERS
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func initTestHMC6352Driver() (driver *HMC6352Driver) {
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driver, _ = initTestHMC6352DriverWithStubbedAdaptor()
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return
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}
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func initTestHMC6352DriverWithStubbedAdaptor() (*HMC6352Driver, *i2cTestAdaptor) {
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adaptor := newI2cTestAdaptor()
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return NewHMC6352Driver(adaptor), adaptor
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}
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// --------- TESTS
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func TestNewHMC6352Driver(t *testing.T) {
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// Does it return a pointer to an instance of HMC6352Driver?
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var bm interface{} = NewHMC6352Driver(newI2cTestAdaptor())
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_, ok := bm.(*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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b := NewHMC6352Driver(newI2cTestAdaptor())
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gobottest.Refute(t, b.Connection(), nil)
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}
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// Methods
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func TestHMC6352DriverStart(t *testing.T) {
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hmc, adaptor := initTestHMC6352DriverWithStubbedAdaptor()
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gobottest.Assert(t, hmc.Start(), nil)
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adaptor.i2cWriteImpl = func() error {
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return errors.New("write error")
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}
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err := hmc.Start()
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gobottest.Assert(t, err, errors.New("write error"))
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adaptor.i2cStartImpl = func() error {
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return errors.New("start error")
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}
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err = hmc.Start()
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gobottest.Assert(t, err, errors.New("start error"))
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}
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func TestHMC6352DriverHalt(t *testing.T) {
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hmc := initTestHMC6352Driver()
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gobottest.Assert(t, hmc.Halt(), nil)
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}
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func TestHMC6352DriverHeading(t *testing.T) {
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// when len(data) is 2
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hmc, adaptor := initTestHMC6352DriverWithStubbedAdaptor()
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adaptor.i2cReadImpl = func() ([]byte, error) {
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return []byte{99, 1}, nil
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}
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heading, _ := hmc.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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hmc, adaptor = initTestHMC6352DriverWithStubbedAdaptor()
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adaptor.i2cReadImpl = func() ([]byte, error) {
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return []byte{99}, nil
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}
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heading, err := hmc.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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hmc, adaptor = initTestHMC6352DriverWithStubbedAdaptor()
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adaptor.i2cReadImpl = func() ([]byte, error) {
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return []byte{}, errors.New("read error")
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}
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heading, err = hmc.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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hmc, adaptor = initTestHMC6352DriverWithStubbedAdaptor()
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adaptor.i2cWriteImpl = func() error {
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return errors.New("write error")
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}
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heading, err = hmc.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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