67b957d4f4
Compared to tests in the repository root, tests in the package have
many downsides:
* Unless explicitly excluded in find_packages(), tests and their
support code effectively become a part of public API.
This, unfortunately, happened with FHDLTestCase, which was never
intended for downstream use.
* Even if explicitly excluded from the setuptools package, using
an editable install, or setting PYTHONPATH still allows accessing
the tests.
* Having a sub-package that is present in the source tree but not
exported (or, worse, exported only sometimes) is confusing.
* The name `nmigen.test` cannot be used for anything else, such as
testing utilities that *are* intended for downstream use.
39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
import unittest
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from itertools import count
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from nmigen.compat import *
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from nmigen.compat.genlib.fifo import SyncFIFO
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from .support import SimCase
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class SyncFIFOCase(SimCase, unittest.TestCase):
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class TestBench(Module):
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def __init__(self):
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self.submodules.dut = SyncFIFO(64, 2)
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self.sync += [
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If(self.dut.we & self.dut.writable,
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self.dut.din[:32].eq(self.dut.din[:32] + 1),
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self.dut.din[32:].eq(self.dut.din[32:] + 2)
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)
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]
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def test_run_sequence(self):
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seq = list(range(20))
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def gen():
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for cycle in count():
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# fire re and we at "random"
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yield self.tb.dut.we.eq(cycle % 2 == 0)
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yield self.tb.dut.re.eq(cycle % 3 == 0)
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# the output if valid must be correct
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if (yield self.tb.dut.readable) and (yield self.tb.dut.re):
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try:
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i = seq.pop(0)
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except IndexError:
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break
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self.assertEqual((yield self.tb.dut.dout[:32]), i)
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self.assertEqual((yield self.tb.dut.dout[32:]), i*2)
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yield
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self.run_with(gen())
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