tests: make hardware-in-the loop flags positive logic

Explicitly having to disable unittests that require hardware
(ARTIQ_NO_HARDWARE) is cumbersome.
There is not even a sensible default for the
device or serial number of the devices requiring additional
variables (ARTIQ_LDA_DEVICE etc).

This patch reverts the logic by skipping unittests that
can not automatically determine whether the required hardware
is present and where it is.

.travis.yml

@@ -7,7 +7,6 @@ env:
     - PATH=$HOME/miniconda/bin:/usr/local/llvm-or1k/bin:$PATH
     - CC=gcc-4.7
     - CXX=g++-4.7
-    - ARTIQ_NO_HARDWARE=1
     - BUILD_SOC=1
     - secure: "DUk/Ihg8KbbzEgPF0qrHqlxU8e8eET9i/BtzNvFddIGX4HP/P2qz0nk3cVkmjuWhqJXSbC22RdKME9qqPzw6fJwJ6dpJ3OR6dDmSd7rewavq+niwxu52PVa+yK8mL4yf1terM7QQ5tIRf+yUL9qGKrZ2xyvEuRit6d4cFep43Ws="
 before_install:

artiq/test/full_stack.py

@@ -9,11 +9,11 @@ from artiq.coredevice import comm_serial, core, runtime_exceptions, rtio
 from artiq.sim import devices as sim_devices
 
 
-no_hardware = bool(os.getenv("ARTIQ_NO_HARDWARE"))
+core_device = os.getenv("ARTIQ_CORE_DEVICE")
 
 
 def _run_on_device(k_class, **parameters):
-    comm = comm_serial.Comm()
+    comm = comm_serial.Comm(serial_dev=core_device)
     try:
         coredev = core.Core(comm=comm)
         k_inst = k_class(core=coredev, **parameters)
@@ -199,7 +199,7 @@ class _RPCExceptions(AutoDB):
             self.success = True
 
 
-@unittest.skipIf(no_hardware, "no hardware")
+@unittest.skipUnless(core_device, "no hardware")
 class ExecutionCase(unittest.TestCase):
     def test_primes(self):
         l_device, l_host = [], []
@@ -208,7 +208,7 @@ class ExecutionCase(unittest.TestCase):
         self.assertEqual(l_device, l_host)
 
     def test_misc(self):
-        comm = comm_serial.Comm()
+        comm = comm_serial.Comm(serial_dev=core_device)
         try:
             coredev = core.Core(comm=comm)
             uut = _Misc(core=coredev)
@@ -249,7 +249,7 @@ class ExecutionCase(unittest.TestCase):
         self.assertEqual(t_device, t_host)
 
     def test_rpc_exceptions(self):
-        comm = comm_serial.Comm()
+        comm = comm_serial.Comm(serial_dev=core_device)
         try:
             uut = _RPCExceptions(core=core.Core(comm=comm))
             with self.assertRaises(_MyException):
@@ -306,13 +306,13 @@ class _RTIOSequenceError(AutoDB):
         self.o.pulse(25*us)
 
 
-@unittest.skipIf(no_hardware, "no hardware")
+@unittest.skipUnless(core_device, "no hardware")
 class RTIOCase(unittest.TestCase):
     # Connect channels 0 and 1 together for this test
     # (C11 and C13 on Papilio Pro)
     def test_loopback(self):
         npulses = 4
-        comm = comm_serial.Comm()
+        comm = comm_serial.Comm(serial_dev=core_device)
         try:
             coredev = core.Core(comm=comm)
             uut = _RTIOLoopback(
@@ -327,7 +327,7 @@ class RTIOCase(unittest.TestCase):
             comm.close()
 
     def test_underflow(self):
-        comm = comm_serial.Comm()
+        comm = comm_serial.Comm(serial_dev=core_device)
         try:
             coredev = core.Core(comm=comm)
             uut = _RTIOUnderflow(
@@ -340,7 +340,7 @@ class RTIOCase(unittest.TestCase):
             comm.close()
 
     def test_sequence_error(self):
-        comm = comm_serial.Comm()
+        comm = comm_serial.Comm(serial_dev=core_device)
         try:
             coredev = core.Core(comm=comm)
             uut = _RTIOSequenceError(

artiq/test/lda.py

@@ -5,8 +5,7 @@ from artiq.devices.lda.driver import Lda, Ldasim
 from artiq.language.units import dB
 
 
-no_hardware = bool(os.getenv("ARTIQ_NO_HARDWARE")) \
-    or bool(os.getenv("ARTIQ_NO_PERIPHERALS"))
+lda_serial = os.getenv("ARTIQ_LDA_SERIAL")
 
 
 class GenericLdaTest:
@@ -20,18 +19,11 @@ class GenericLdaTest:
                 self.assertEqual(i, self.cont.get_attenuation())
 
 
-@unittest.skipIf(no_hardware, "no hardware")
+@unittest.skipUnless(lda_serial, "no hardware")
 class TestLda(GenericLdaTest, unittest.TestCase):
     def setUp(self):
-        device = os.getenv("ARTIQ_LDA_DEVICE")
-        serial = os.getenv("ARTIQ_LDA_SERIAL")
-        args = dict()
-        if device is not None:
-            args["product"] = device
-        if serial is not None:
-            args["serial"] = serial
-
-        self.cont = Lda(**args)
+        product = os.getenv("ARTIQ_LDA_PRODUCT")
+        self.cont = Lda(serial=lda_serial, product=product)
 
 
 class TestLdaSim(GenericLdaTest, unittest.TestCase):

artiq/test/thorlabs_tcube.py

@@ -6,10 +6,6 @@ from artiq.devices.thorlabs_tcube.driver import Tdc, Tpz, TdcSim, TpzSim
 from artiq.language.units import V
 
 
-no_hardware = bool(os.getenv("ARTIQ_NO_HARDWARE")) \
-    or bool(os.getenv("ARTIQ_NO_PERIPHERALS"))
-
-
 class GenericTdcTest:
     def test_pot_parameters(self):
         test_vector = 1, 2, 3, 4, 5, 6, 7, 8
@@ -135,11 +131,13 @@ class GenericTpzTest:
                 self.assertEqual(test_vector, self.cont.get_tpz_io_settings())
 
 
-@unittest.skipIf(no_hardware, "no hardware")
+tdc_serial = os.getenv("ARTIQ_TDC_SERIAL")
+
+
+@unittest.skipUnless(tdc_serial, "no hardware")
 class TestTdc(unittest.TestCase, GenericTdcTest):
     def setUp(self):
-        serial_dev = os.getenv("ARTIQ_TDC001_SERIAL", "/dev/ttyUSB0")
-        self.cont = Tdc(serial_dev=serial_dev)
+        self.cont = Tdc(serial_dev=tdc_serial)
 
 
 class TestTdcSim(unittest.TestCase, GenericTdcTest):
@@ -147,11 +145,13 @@ class TestTdcSim(unittest.TestCase, GenericTdcTest):
         self.cont = TdcSim()
 
 
-@unittest.skipIf(no_hardware, "no hardware")
+tpz_serial = os.getenv("ARTIQ_TPZ_SERIAL")
+
+
+@unittest.skipUnless(tpz_serial, "no hardware")
 class TestTpz(unittest.TestCase, GenericTpzTest):
     def setUp(self):
-        serial_dev = os.getenv("ARTIQ_TPZ001_SERIAL", "/dev/ttyUSB0")
-        self.cont = Tpz(serial_dev=serial_dev)
+        self.cont = Tpz(serial_dev=tpz_serial)
 
 
 class TestTpzSim(unittest.TestCase, GenericTpzTest):