def test_read_config(self) -> None:
"""
Test that reading it from config works.
"""
src = """
vlsi.inputs.clocks:
- name: "my_port"
period: "50 ns"
path: "Top/clock"
uncertainty: "1 ns"
generated: true
source_path: "Top/pll/out"
divisor: 2
group: "ClkGrp"
"""
self.check_src(
src,
ClockPort(name="my_port",
period=TimeValue("50 ns"),
path="Top/clock",
uncertainty=TimeValue("1 ns"),
generated=True,
source_path="Top/pll/out",
divisor=2,
group="ClkGrp"))
def test_round_trip(self) -> None:
"""
Test that converting to and from dict works.
"""
orig = DelayConstraint(name="mypin",
clock="clock",
direction="input",
delay=TimeValue("20 ns"))
copied = DelayConstraint.from_dict(orig.to_dict())
self.assertEqual(orig, copied)
orig = DelayConstraint(name="pin_2",
clock="clock_20MHz",
direction="output",
delay=TimeValue("0.3 ns"))
copied = DelayConstraint.from_dict(orig.to_dict())
self.assertEqual(orig, copied)
def test_optional_generated(self) -> None:
"""
Test that the generated attribute is optional and that there is
no effect if it is false.
"""
src = """
vlsi.inputs.clocks:
- name: "my_port"
period: "50 ns"
path: "Top/clock"
uncertainty: "1 ns"
source_path: "Top/pll/out"
divisor: 2
"""
self.check_src(
src,
ClockPort(name="my_port",
period=TimeValue("50 ns"),
path="Top/clock",
uncertainty=TimeValue("1 ns"),
generated=None,
source_path=None,
divisor=None,
group=None))
src2 = """
vlsi.inputs.clocks:
- name: "my_port"
period: "50 ns"
path: "Top/clock"
uncertainty: "1 ns"
generated: false
source_path: "Top/pll/out"
divisor: 2
"""
self.check_src(
src2,
ClockPort(name="my_port",
period=TimeValue("50 ns"),
path="Top/clock",
uncertainty=TimeValue("1 ns"),
generated=False,
source_path=None,
divisor=None,
group=None))
def test_invalid_direction(self) -> None:
"""
Test that invalid directions are caught properly.
"""
with self.assertRaises(ValueError):
DelayConstraint(
name="mypin",
clock="clock",
direction="bad",
delay=TimeValue("20 ns")
)
with self.assertRaises(ValueError):
DelayConstraint(
name="mypin",
clock="clock",
direction="inputt",
delay=TimeValue("20 ns")
)
with self.assertRaises(ValueError):
DelayConstraint(
name="mypin",
clock="clock",
direction="inputoutput",
delay=TimeValue("20 ns")
)
with self.assertRaises(ValueError):
DelayConstraint(
name="mypin",
clock="clock",
direction="",
delay=TimeValue("20 ns")
)
# Test that the error is raised with the dict as well.
with self.assertRaises(ValueError):
DelayConstraint.from_dict({
"name": "mypin",
"clock": "clock",
"direction": "",
"delay": "20 ns"
})