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mcp23017: use new tester package

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Also change the `tester` package slightly to use an exposed `Registers`
array rather adding yet another accessor method to retrieve a register
value. This seems to me more transparent and "obvious" - we aren't trying
to hide the fact that there's just a simple memory store there.
Also unexport the `assertRegisterRange` method which was never intended
to be part of the public API.
This commit is contained in:
Roger Peppe
2021-01-18 12:56:19 +00:00
committed by Ron Evans
parent ce5e443084
commit 8cb226938b
7 changed files with 78 additions and 169 deletions
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mcp23017/device_test.go
+26 -16
View File
@@ -5,12 +5,14 @@ import (
"testing"
qt "github.com/frankban/quicktest"
"tinygo.org/x/drivers/tester"
)
func TestGetPins(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
fdev.Registers[rGPIO] = 0b10101100
fdev.Registers[rGPIO|portB] = 0b01010011
dev, err := NewI2C(bus, 0x20)
@@ -22,8 +24,8 @@ func TestGetPins(t *testing.T) {
func TestSetPins(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
fdev.Registers[rGPIO] = 0b00001111
fdev.Registers[rGPIO|portB] = 0b11110000
dev, err := NewI2C(bus, 0x20)
@@ -52,8 +54,8 @@ func TestSetPins(t *testing.T) {
func TestTogglePins(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
fdev.Registers[rGPIO] = 0b00001111
fdev.Registers[rGPIO|portB] = 0b11110000
dev, err := NewI2C(bus, 0x20)
@@ -71,8 +73,8 @@ func TestTogglePins(t *testing.T) {
func TestSetGetModes(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
dev, err := NewI2C(bus, 0x20)
c.Assert(err, qt.IsNil)
// Calling SetModes with less items in than there are
@@ -102,8 +104,8 @@ func TestSetGetModes(t *testing.T) {
func TestPinSetGet(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
dev, err := NewI2C(bus, 0x20)
c.Assert(err, qt.IsNil)
pin := dev.Pin(1)
@@ -129,8 +131,8 @@ func TestPinSetGet(t *testing.T) {
func TestPinToggle(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
dev, err := NewI2C(bus, 0x20)
c.Assert(err, qt.IsNil)
pin := dev.Pin(1)
@@ -147,8 +149,8 @@ func TestPinToggle(t *testing.T) {
func TestPinMode(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
dev, err := NewI2C(bus, 0x20)
c.Assert(err, qt.IsNil)
pin := dev.Pin(1)
@@ -201,10 +203,18 @@ func TestPins(t *testing.T) {
func TestInitWithError(t *testing.T) {
c := qt.New(t)
bus := newBus(c)
fdev := bus.addDevice(0x20)
bus := tester.NewI2CBus(c)
fdev := newDevice(bus, 0x20)
fdev.Err = fmt.Errorf("some error")
dev, err := NewI2C(bus, 0x20)
c.Assert(err, qt.ErrorMatches, `cannot initialize mcp23017 device at 0x20: some error`)
c.Assert(dev, qt.IsNil)
}
func newDevice(bus *tester.I2CBus, addr uint8) *tester.I2CDevice {
fdev := bus.NewDevice(addr)
// IODIRA and IODIRB are all ones by default.
fdev.Registers[rIODIR] = 0xff
fdev.Registers[rIODIR|portB] = 0xff
return fdev
}