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amaranth/tests/test_lib_io.py
whitequark 67b957d4f4 tests: move out of the main package. 
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.
2020-08-27 00:33:31 +00:00

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from nmigen.hdl import *
from nmigen.hdl.rec import *
from nmigen.back.pysim import *
from nmigen.lib.io import *
from .utils import *
class PinLayoutTestCase(FHDLTestCase):
def assertLayoutEqual(self, layout, expected):
casted_layout = {}
for name, (shape, dir) in layout.items():
casted_layout[name] = (Shape.cast(shape), dir)
self.assertEqual(casted_layout, expected)
class PinLayoutCombTestCase(PinLayoutTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i")
self.assertLayoutEqual(layout_1.fields, {
"i": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="i")
self.assertLayoutEqual(layout_2.fields, {
"i": ((2, False), DIR_NONE),
})
def test_pin_layout_o(self):
layout_1 = pin_layout(1, dir="o")
self.assertLayoutEqual(layout_1.fields, {
"o": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="o")
self.assertLayoutEqual(layout_2.fields, {
"o": ((2, False), DIR_NONE),
})
def test_pin_layout_oe(self):
layout_1 = pin_layout(1, dir="oe")
self.assertLayoutEqual(layout_1.fields, {
"o": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="oe")
self.assertLayoutEqual(layout_2.fields, {
"o": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
def test_pin_layout_io(self):
layout_1 = pin_layout(1, dir="io")
self.assertLayoutEqual(layout_1.fields, {
"i": ((1, False), DIR_NONE),
"o": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="io")
self.assertLayoutEqual(layout_2.fields, {
"i": ((2, False), DIR_NONE),
"o": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
class PinLayoutSDRTestCase(PinLayoutTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i", xdr=1)
self.assertLayoutEqual(layout_1.fields, {
"i_clk": ((1, False), DIR_NONE),
"i": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="i", xdr=1)
self.assertLayoutEqual(layout_2.fields, {
"i_clk": ((1, False), DIR_NONE),
"i": ((2, False), DIR_NONE),
})
def test_pin_layout_o(self):
layout_1 = pin_layout(1, dir="o", xdr=1)
self.assertLayoutEqual(layout_1.fields, {
"o_clk": ((1, False), DIR_NONE),
"o": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="o", xdr=1)
self.assertLayoutEqual(layout_2.fields, {
"o_clk": ((1, False), DIR_NONE),
"o": ((2, False), DIR_NONE),
})
def test_pin_layout_oe(self):
layout_1 = pin_layout(1, dir="oe", xdr=1)
self.assertLayoutEqual(layout_1.fields, {
"o_clk": ((1, False), DIR_NONE),
"o": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="oe", xdr=1)
self.assertLayoutEqual(layout_2.fields, {
"o_clk": ((1, False), DIR_NONE),
"o": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
def test_pin_layout_io(self):
layout_1 = pin_layout(1, dir="io", xdr=1)
self.assertLayoutEqual(layout_1.fields, {
"i_clk": ((1, False), DIR_NONE),
"i": ((1, False), DIR_NONE),
"o_clk": ((1, False), DIR_NONE),
"o": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="io", xdr=1)
self.assertLayoutEqual(layout_2.fields, {
"i_clk": ((1, False), DIR_NONE),
"i": ((2, False), DIR_NONE),
"o_clk": ((1, False), DIR_NONE),
"o": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
class PinLayoutDDRTestCase(PinLayoutTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i", xdr=2)
self.assertLayoutEqual(layout_1.fields, {
"i_clk": ((1, False), DIR_NONE),
"i0": ((1, False), DIR_NONE),
"i1": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="i", xdr=2)
self.assertLayoutEqual(layout_2.fields, {
"i_clk": ((1, False), DIR_NONE),
"i0": ((2, False), DIR_NONE),
"i1": ((2, False), DIR_NONE),
})
def test_pin_layout_o(self):
layout_1 = pin_layout(1, dir="o", xdr=2)
self.assertLayoutEqual(layout_1.fields, {
"o_clk": ((1, False), DIR_NONE),
"o0": ((1, False), DIR_NONE),
"o1": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="o", xdr=2)
self.assertLayoutEqual(layout_2.fields, {
"o_clk": ((1, False), DIR_NONE),
"o0": ((2, False), DIR_NONE),
"o1": ((2, False), DIR_NONE),
})
def test_pin_layout_oe(self):
layout_1 = pin_layout(1, dir="oe", xdr=2)
self.assertLayoutEqual(layout_1.fields, {
"o_clk": ((1, False), DIR_NONE),
"o0": ((1, False), DIR_NONE),
"o1": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="oe", xdr=2)
self.assertLayoutEqual(layout_2.fields, {
"o_clk": ((1, False), DIR_NONE),
"o0": ((2, False), DIR_NONE),
"o1": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
def test_pin_layout_io(self):
layout_1 = pin_layout(1, dir="io", xdr=2)
self.assertLayoutEqual(layout_1.fields, {
"i_clk": ((1, False), DIR_NONE),
"i0": ((1, False), DIR_NONE),
"i1": ((1, False), DIR_NONE),
"o_clk": ((1, False), DIR_NONE),
"o0": ((1, False), DIR_NONE),
"o1": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="io", xdr=2)
self.assertLayoutEqual(layout_2.fields, {
"i_clk": ((1, False), DIR_NONE),
"i0": ((2, False), DIR_NONE),
"i1": ((2, False), DIR_NONE),
"o_clk": ((1, False), DIR_NONE),
"o0": ((2, False), DIR_NONE),
"o1": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
class PinTestCase(FHDLTestCase):
def test_attributes(self):
pin = Pin(2, dir="io", xdr=2)
self.assertEqual(pin.width, 2)
self.assertEqual(pin.dir, "io")
self.assertEqual(pin.xdr, 2)
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