Livt.Usb

tests/BulkOnlyTransportTest.lvt

namespace Livt.Usb.Tests

using Livt.Usb.MassStorage

/** Exercises real BOT serialization, retained data and bounded fault recovery. */
@Test
component BulkOnlyTransportTest
{
	model: BulkOnlyControllerModel
	transport: BulkOnlyTransport
	armCancel: bool

	new()
	{
		model = new BulkOnlyControllerModel()
		transport = new BulkOnlyTransport(model)
		transport.Configure(64, 2, 1, 64, 2, 64)
	}

	process Cancellation[]()
	{
		transport.cancel = armCancel && model.waiting
	}

	@Test
	fn ReadsAndRetainsSector()
	{
		model.Reset(0)
		assert transport.Execute(40, 0x12345678, 512) == BulkOnlyResult.Passed
		assert model.observedLba == 0x12345678
		assert transport.GetLength() == 512
		var value: byte

		for (var index = 0; index < 512; index++) {
			assert transport.TryReadByte(index, value)
			assert value == (((index & 255) ^ 165) as byte)
		}

		assert transport.TryReadByte(0, value) && value == 165
		assert !transport.TryReadByte(512, value) && value == 0
	}

	@Test
	fn RejectsInvalidStatusAndRecovers()
	{
		for (var fault: byte = 1; fault <= 4; fault++) {
			model.Reset(fault)
			assert transport.Execute(40, 0, 512) == BulkOnlyResult.TransportError
			assert model.resetCount == 1 && model.clearCount == 2 && model.toggleCount == 2
			assert transport.GetLength() == 0
		}
	}

	@Test
	fn HandlesCommandFailureStallsTimeoutAndUnplug()
	{
		model.Reset(5)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.CommandFailed
		assert model.resetCount == 0 && transport.GetLength() == 0
		model.Reset(6)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.Passed
		assert model.resetCount == 0 && model.clearCount == 1 && model.toggleCount == 1
		model.Reset(7)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.CommandFailed
		assert model.clearCount == 1 && model.toggleCount == 1
		model.Reset(8)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.TransportError
		assert model.resetCount == 1
		model.Reset(9)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.Disconnected
		assert model.resetCount == 0
	}

	@Test
	fn RejectsWritesAndInvalidGeometryAndFailedRecovery()
	{
		model.Reset(0)
		assert transport.Execute(42, 0, 512) == BulkOnlyResult.TransportError
		assert transport.Execute(40, 0, 64) == BulkOnlyResult.TransportError
		assert model.resetCount == 0 && transport.GetLength() == 0
		model.Reset(10)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.RecoveryFailed
		assert model.resetCount == 1 && model.clearCount == 0
		assert transport.GetLength() == 0
	}

	@Test
	fn CancelsActiveTransfersAndBoundsStatusRetry()
	{
		model.Reset(11)
		armCancel = true
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.Cancelled
		assert model.resetCount == 1 && model.clearCount == 2 && model.toggleCount == 2
		assert transport.GetLength() == 0
		armCancel = false
		model.Reset(12)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.TransportError
		assert model.resetCount == 1 && model.clearCount == 3
		model.Reset(13)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.TransportError
		model.Reset(15)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.TransportError
		model.Reset(16)
		assert transport.Execute(40, 0, 512) == BulkOnlyResult.Passed
		assert transport.GetLength() == 256
	}
}