amaranth/tests/test_tracer.py

from amaranth.hdl._ast import *
from amaranth.hdl import _ast
from types import SimpleNamespace

from .utils import *

class TracerTestCase(FHDLTestCase):
    def test_fast(self):
        s1 = Signal()
        self.assertEqual(s1.name, "s1")
        s2 = Signal()
        self.assertEqual(s2.name, "s2")

    def test_call_variants(self):
        args = []
        kwargs = {}
        s1 = Signal()
        self.assertEqual(s1.name, "s1")
        s2 = Signal(init=0)
        self.assertEqual(s2.name, "s2")
        s3 = Signal(*args, **kwargs)
        self.assertEqual(s3.name, "s3")
        s4 = _ast.Signal()
        self.assertEqual(s4.name, "s4")
        s5 = _ast.Signal(init=0)
        self.assertEqual(s5.name, "s5")
        s6 = _ast.Signal(*args, **kwargs)
        self.assertEqual(s6.name, "s6")

    def test_name(self):
        class Dummy:
            s1 = Signal()
            self.assertEqual(s1.name, "s1")
            s2 = Signal()
            self.assertEqual(s2.name, "s2")

    def test_attr(self):
        ns = SimpleNamespace()
        ns.s1 = Signal()
        self.assertEqual(ns.s1.name, "s1")
        ns.s2 = Signal()
        self.assertEqual(ns.s2.name, "s2")

    def test_index(self):
        l = [None]
        l[0] = Signal()
        self.assertEqual(l[0].name, "$signal")

    def test_deref_cell(self):
        s1 = Signal()
        self.assertEqual(s1.name, "s1")
        s2 = Signal()
        self.assertEqual(s2.name, "s2")

        def dummy():
            return s1, s2

    def test_deref_free(self):
        def inner():
            nonlocal s3, s4
            s3 = Signal()
            s4 = Signal()
            return s1, s2

        s1 = Signal()
        s2 = Signal()
        s3 = None
        s4 = None
        inner()
        self.assertEqual(s1.name, "s1")
        self.assertEqual(s2.name, "s2")
        self.assertEqual(s3.name, "s3")
        self.assertEqual(s4.name, "s4")

    def test_long(self):
        test = ""
        for i in range(100000):
            test += f"dummy{i} = None\n"
        test += "s1 = Signal()\n"
        test += "s2 = Signal()\n"
        ns = {"Signal": Signal}
        exec(test, ns)
        self.assertEqual(ns["s1"].name, "s1")
        self.assertEqual(ns["s2"].name, "s2")

    def test_deref_fast(self):
        def inner(s2):
            s1 = Signal()
            s2 = Signal()
            self.assertEqual(s1.name, "s1")
            self.assertEqual(s2.name, "s2")

            def dummy():
                return s1, s2

        inner(None)