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127 lines
3.1 KiB
Go
127 lines
3.1 KiB
Go
package sysfs
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import (
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"errors"
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"os"
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"syscall"
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"testing"
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"gobot.io/x/gobot/gobottest"
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)
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func TestDigitalPin(t *testing.T) {
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a := NewAccesser()
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mockPaths := []string{
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"/sys/class/gpio/export",
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"/sys/class/gpio/unexport",
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"/sys/class/gpio/gpio10/value",
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"/sys/class/gpio/gpio10/direction",
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}
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fs := a.UseMockFilesystem(mockPaths)
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pin := a.NewDigitalPin(10, "custom")
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gobottest.Assert(t, pin.pin, "10")
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gobottest.Assert(t, pin.label, "custom")
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pin = a.NewDigitalPin(10)
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gobottest.Assert(t, pin.pin, "10")
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gobottest.Assert(t, pin.label, "gpio10")
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gobottest.Assert(t, pin.value, nil)
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err := pin.Unexport()
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, fs.Files["/sys/class/gpio/unexport"].Contents, "10")
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err = pin.Export()
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, fs.Files["/sys/class/gpio/export"].Contents, "10")
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gobottest.Refute(t, pin.value, nil)
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err = pin.Write(1)
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, fs.Files["/sys/class/gpio/gpio10/value"].Contents, "1")
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err = pin.Direction(IN)
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gobottest.Assert(t, err, nil)
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gobottest.Assert(t, fs.Files["/sys/class/gpio/gpio10/direction"].Contents, "in")
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data, _ := pin.Read()
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gobottest.Assert(t, 1, data)
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pin2 := a.NewDigitalPin(30, "custom")
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err = pin2.Write(1)
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gobottest.Assert(t, err.Error(), "pin has not been exported")
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data, err = pin2.Read()
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gobottest.Assert(t, err.Error(), "pin has not been exported")
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gobottest.Assert(t, data, 0)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EINVAL}
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}
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err = pin.Unexport()
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gobottest.Assert(t, err, nil)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: errors.New("write error")}
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}
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err = pin.Unexport()
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gobottest.Assert(t, err.(*os.PathError).Err, errors.New("write error"))
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EBUSY}
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}
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err = pin.Export()
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gobottest.Assert(t, err, nil)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: errors.New("write error")}
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}
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err = pin.Export()
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gobottest.Assert(t, err.(*os.PathError).Err, errors.New("write error"))
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}
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func TestDigitalPinExportError(t *testing.T) {
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a := NewAccesser()
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mockPaths := []string{
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"/sys/class/gpio/export",
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"/sys/class/gpio/unexport",
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"/sys/class/gpio/gpio10/value",
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"/sys/class/gpio/gpio10/direction",
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}
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a.UseMockFilesystem(mockPaths)
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pin := a.NewDigitalPin(10, "custom")
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EBUSY}
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}
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err := pin.Export()
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gobottest.Assert(t, err.Error(), " : /sys/class/gpio/custom/direction: No such file.")
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}
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func TestDigitalPinUnexportError(t *testing.T) {
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a := NewAccesser()
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mockPaths := []string{
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"/sys/class/gpio/export",
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"/sys/class/gpio/unexport",
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"/sys/class/gpio/gpio10/value",
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"/sys/class/gpio/gpio10/direction",
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}
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a.UseMockFilesystem(mockPaths)
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pin := a.NewDigitalPin(10, "custom")
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EBUSY}
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}
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err := pin.Unexport()
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gobottest.Assert(t, err.Error(), " : device or resource busy")
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}
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