public void Read_one_byte_register()
{
// ARRANGE
_mockSpiDevice.WriteAction = buffer =>
{
Assert.AreEqual(1, buffer.Length);
Assert.AreEqual(0x42, buffer[0]);
};
_mockSpiDevice.ReadAction = buffer =>
{
Assert.AreEqual(1, _mockSpiDevice.WriteActionCount, "The Write must come before the Read");
Assert.AreEqual(1, buffer.Length);
buffer[0] = 0x99;
};
// ACT
MockRegister readRegister = _registerManager.Read <MockRegister>();
// ASSERT
Assert.AreEqual(1, _mockSpiDevice.ReadActionCount);
Assert.AreEqual(1, _mockSpiDevice.WriteActionCount);
Assert.AreEqual(1, readRegister.RegisterValues.Length);
Assert.AreEqual(0x99, readRegister.RegisterValues[0]);
}
public void Write_one_byte_register()
{
// ARRANGE
var mockRegister = new MockRegister(0x42, 1, new byte[] { 0x99 });
_mockSpiDevice.WriteAction = buffer =>
{
Assert.AreEqual(2, buffer.Length);
Assert.AreEqual(0x42 | 0x80, buffer[0]);
Assert.AreEqual(0x99, buffer[1]);
};
// ACT
_registerManager.Write(mockRegister);
// ASSERT
Assert.AreEqual(0, _mockSpiDevice.ReadActionCount);
Assert.AreEqual(1, _mockSpiDevice.WriteActionCount);
}
public void Write_three_bytes_register()
{
// ARRANGE
var mockRegister = new MockRegister(0x42, 1, new byte[] { 0x12, 0x34, 0x56 });
_mockSpiDevice.WriteAction = buffer =>
{
Assert.AreEqual(2, buffer.Length);
switch (_mockSpiDevice.WriteActionCount)
{
case 0:
Assert.AreEqual(0x42 | 0x80, buffer[0]);
Assert.AreEqual(0x12, buffer[1]);
break;
case 1:
Assert.AreEqual(0x43 | 0x80, buffer[0]);
Assert.AreEqual(0x34, buffer[1]);
break;
case 2:
Assert.AreEqual(0x44 | 0x80, buffer[0]);
Assert.AreEqual(0x56, buffer[1]);
break;
default:
Assert.Fail("Too many writes!");
break;
}
};
// ACT
_registerManager.Write(mockRegister);
// ASSERT
Assert.AreEqual(0, _mockSpiDevice.ReadActionCount);
Assert.AreEqual(3, _mockSpiDevice.WriteActionCount);
}
public void Read_three_bytes_register()
{
// ARRANGE
_mockSpiDevice.WriteAction = buffer =>
{
Assert.AreEqual(1, buffer.Length);
switch (_mockSpiDevice.WriteActionCount)
{
case 0:
Assert.AreEqual(0x42, buffer[0]);
break;
case 1:
Assert.AreEqual(0x43, buffer[0]);
break;
case 2:
Assert.AreEqual(0x44, buffer[0]);
break;
default:
Assert.Fail("Too many writes!");
break;
}
};
_mockSpiDevice.ReadAction = buffer =>
{
Assert.AreEqual(_mockSpiDevice.ReadActionCount + 1, _mockSpiDevice.WriteActionCount, "The Write must come before the Read");
Assert.AreEqual(1, buffer.Length);
switch (_mockSpiDevice.ReadActionCount)
{
case 0:
buffer[0] = 0x12;
break;
case 1:
buffer[0] = 0x34;
break;
case 2:
buffer[0] = 0x56;
break;
default:
Assert.Fail("Too many reads!");
break;
}
};
// ACT
MockRegister readRegister = _registerManager.Read <MockRegister>();
// ASSERT
Assert.AreEqual(3, _mockSpiDevice.ReadActionCount);
Assert.AreEqual(3, _mockSpiDevice.WriteActionCount);
Assert.AreEqual(3, readRegister.RegisterValues.Length);
Assert.AreEqual(0x12, readRegister.RegisterValues[0]);
Assert.AreEqual(0x34, readRegister.RegisterValues[1]);
Assert.AreEqual(0x56, readRegister.RegisterValues[2]);
}
