public void can_enable_disable_specific_bit()
{
// Arrange
var deviceId = 32;
var deviceState = 0;
var i2c = Substitute.For <II2c>();
i2c.When(x => x.WriteToDevice(Arg.Any <int>(), Arg.Any <byte>(), Arg.Any <byte>()))
.Do(x => deviceState = x.ArgAt <byte>(2));
var powerOutput = new ShinyMcpExpander(i2c);
// Act
powerOutput.SetState(BuildOutputDescriptor(deviceId, "O1"), true); // 1000 0000
powerOutput.SetState(BuildOutputDescriptor(deviceId, "O3"), true); // 1010 0000
powerOutput.SetState(BuildOutputDescriptor(deviceId, "O6"), true); // 1010 0100
powerOutput.SetState(BuildOutputDescriptor(deviceId, "O3"), false); // 1000 0100 => 132
// Assert
Assert.Equal(132, deviceState);
i2c.Received().WriteToDevice(deviceId, 0x15, 132);
}
public void initializes_output_before_setting_state()
{
// Arrange
var deviceId = 32;
var i2c = Substitute.For <II2c>();
var powerOutput = new ShinyMcpExpander(i2c);
// Act
powerOutput.SetState(BuildOutputDescriptor(deviceId, "N1"), true);
// Assert
i2c.Received().WriteToDevice(deviceId, 0x00, 0x00);
i2c.Received().WriteToDevice(deviceId, 0x01, 0x00);
i2c.Received().WriteToDevice(deviceId, 0x14, 0x02);
}
public void can_set_and_read_state()
{
// Arrange
var deviceId = 32;
var i2c = Substitute.For <II2c>();
var powerOutput = new ShinyMcpExpander(i2c);
// Act
powerOutput.SetState(BuildOutputDescriptor(deviceId, "O3"), true); // 0000 0100
// Assert
Assert.Equal(false, powerOutput.GetState(BuildOutputDescriptor(deviceId, "O1")));
Assert.Equal(false, powerOutput.GetState(BuildOutputDescriptor(deviceId, "O2")));
Assert.Equal(true, powerOutput.GetState(BuildOutputDescriptor(deviceId, "O3")));
Assert.Equal(false, powerOutput.GetState(BuildOutputDescriptor(deviceId, "O4")));
}