public void OnPowerChangeEnablesIfNotEnabled()
{
//arrange
var fs = Substitute.For <IFileSystem>();
fs.Read("/sys/class/gpio/gpio123/direction").Returns("in");
var pinInterface = new LinuxPinInterface(123, fs);
//act
pinInterface.OnPowerChange(null);
//assert
fs.Received().Write("/sys/class/gpio/export", "123");
}
public void OnPowerChangePerformsAction()
{
//arrange
var fs = Substitute.For <IFileSystem>();
fs.Read("/sys/class/gpio/gpio123/direction").Returns("in");
fs.When(f => f.Watch(Arg.Any <string>(), Arg.Any <Func <bool> >(), Arg.Any <Action>())).Do(c =>
{
if (c.Arg <Func <bool> >().Invoke())
{
c.Arg <Action>().Invoke();
}
});
var pinInterface = new LinuxPinInterface(123, fs);
var called = false;
//act
pinInterface.OnPowerChange(() => called = true);
//assert
Assert.True(called);
}