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test_event.py
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# nmigen: UnusedElaboratable=no
import unittest
from nmigen import *
from nmigen.back.pysim import *
from ..event import *
def simulation_test(dut, process):
sim = Simulator(dut)
sim.add_clock(1e-6)
sim.add_sync_process(process)
with sim.write_vcd(vcd_file=open("test.vcd", "w")):
sim.run()
class SourceTestCase(unittest.TestCase):
def test_level(self):
src = Source(trigger="level")
self.assertEqual(src.trigger, Source.Trigger.LEVEL)
def test_rise(self):
src = Source(trigger="rise")
self.assertEqual(src.trigger, Source.Trigger.RISE)
def test_fall(self):
src = Source(trigger="fall")
self.assertEqual(src.trigger, Source.Trigger.FALL)
def test_trigger_wrong(self):
with self.assertRaisesRegex(ValueError,
r"Invalid trigger mode 'foo'; must be one of level, rise, fall"):
src = Source(trigger="foo")
def test_get_map_none(self):
src = Source()
self.assertEqual(src.event_map, None)
def test_get_map_frozen(self):
src = Source()
src.event_map = EventMap()
with self.assertRaisesRegex(ValueError,
r"Event map has been frozen. Cannot add source."):
src.event_map.add(Source())
def test_set_map_wrong(self):
src = Source()
with self.assertRaisesRegex(TypeError,
r"Event map must be an instance of EventMap, not 'foo'"):
src.event_map = "foo"
class EventMapTestCase(unittest.TestCase):
def test_add(self):
src_0 = Source()
src_1 = Source()
event_map = EventMap()
event_map.add(src_0)
event_map.add(src=src_1)
self.assertTrue(src_0 in event_map._sources)
self.assertTrue(src_1 in event_map._sources)
def test_add_wrong(self):
event_map = EventMap()
with self.assertRaisesRegex(TypeError,
r"Event source must be an instance of event.Source, not 'foo'"):
event_map.add("foo")
def test_add_wrong_frozen(self):
event_map = EventMap()
event_map.freeze()
with self.assertRaisesRegex(ValueError,
r"Event map has been frozen. Cannot add source."):
event_map.add(Source())
def test_size(self):
event_map = EventMap()
event_map.add(Source())
event_map.add(Source())
self.assertEqual(event_map.size, 2)
def test_index(self):
src_0 = Source()
src_1 = Source()
event_map = EventMap()
event_map.add(src_0)
event_map.add(src_1)
self.assertEqual(event_map.index(src_0), 0)
self.assertEqual(event_map.index(src=src_1), 1)
def test_index_add_twice(self):
src = Source()
event_map = EventMap()
event_map.add(src)
event_map.add(src)
self.assertEqual(event_map.index(src), 0)
self.assertEqual(event_map.size, 1)
def test_index_wrong(self):
event_map = EventMap()
with self.assertRaisesRegex(TypeError,
r"Event source must be an instance of event.Source, not 'foo'"):
event_map.index("foo")
def test_index_not_found(self):
src = Source()
event_map = EventMap()
with self.assertRaises(KeyError):
event_map.index(src)
def test_iter_sources(self):
src_0 = Source()
src_1 = Source()
event_map = EventMap()
event_map.add(src_0)
event_map.add(src_1)
self.assertEqual(list(event_map.sources()), [
(src_0, 0),
(src_1, 1),
])
class MonitorTestCase(unittest.TestCase):
def test_simple(self):
sub_0 = Source()
sub_1 = Source()
event_map = EventMap()
event_map.add(sub_0)
event_map.add(sub_1)
dut = Monitor(event_map, trigger="rise")
self.assertIs(dut.src.event_map, event_map)
self.assertEqual(dut.src.trigger, Source.Trigger.RISE)
self.assertEqual(dut.enable.width, 2)
self.assertEqual(dut.pending.width, 2)
self.assertEqual(dut.clear.width, 2)
def test_event_map_wrong(self):
with self.assertRaisesRegex(TypeError,
r"Event map must be an instance of EventMap, not 'foo'"):
dut = Monitor(event_map="foo")
def test_events(self):
sub_0 = Source(trigger="level")
sub_1 = Source(trigger="rise")
sub_2 = Source(trigger="fall")
event_map = EventMap()
event_map.add(sub_0)
event_map.add(sub_1)
event_map.add(sub_2)
dut = Monitor(event_map)
def process():
yield sub_0.i.eq(1)
yield sub_1.i.eq(0)
yield sub_2.i.eq(1)
yield
self.assertEqual((yield sub_0.trg), 1)
self.assertEqual((yield sub_1.trg), 0)
self.assertEqual((yield sub_2.trg), 0)
yield
self.assertEqual((yield dut.pending), 0b001)
self.assertEqual((yield dut.src.i), 0)
yield dut.enable.eq(0b111)
yield
self.assertEqual((yield dut.src.i), 1)
yield dut.clear.eq(0b001)
yield
self.assertEqual((yield dut.pending), 0b001)
self.assertEqual((yield dut.src.i), 1)
yield sub_0.i.eq(0)
yield
self.assertEqual((yield sub_0.trg), 0)
self.assertEqual((yield sub_1.trg), 0)
self.assertEqual((yield sub_2.trg), 0)
yield
self.assertEqual((yield dut.pending), 0b000)
self.assertEqual((yield dut.src.i), 0)
yield sub_1.i.eq(1)
yield
self.assertEqual((yield sub_0.trg), 0)
self.assertEqual((yield sub_1.trg), 1)
self.assertEqual((yield sub_2.trg), 0)
yield
self.assertEqual((yield dut.pending), 0b010)
self.assertEqual((yield dut.src.i), 1)
yield sub_2.i.eq(0)
yield
self.assertEqual((yield sub_0.trg), 0)
self.assertEqual((yield sub_1.trg), 0)
self.assertEqual((yield sub_2.trg), 1)
yield
self.assertEqual((yield dut.pending), 0b110)
self.assertEqual((yield dut.src.i), 1)
yield dut.clear.eq(0b110)
yield
self.assertEqual((yield sub_0.trg), 0)
self.assertEqual((yield sub_1.trg), 0)
self.assertEqual((yield sub_2.trg), 0)
yield
self.assertEqual((yield dut.pending), 0b000)
self.assertEqual((yield dut.src.i), 0)
simulation_test(dut, process)