test_grounding_space.py

import unittest

from hyperon import *
from test_common import HyperonTestCase

class GroundingSpaceTest(HyperonTestCase):

    def test_add(self):
        kb = GroundingSpaceRef()
        kb.add_atom(S("a"))

        kb.add_atom(S("b"))

        self.assertEqualNoOrder(kb.get_atoms(), [S("a"), S("b")])

    def test_remove(self):
        kb = GroundingSpaceRef()
        kb.add_atom(S("a"))
        kb.add_atom(S("b"))
        kb.add_atom(S("c"))

        self.assertTrue(kb.remove_atom(S("b")))

        self.assertEqualNoOrder(kb.get_atoms(), [S("a"), S("c")])

    def test_replace(self):
        kb = GroundingSpaceRef()
        kb.add_atom(S("a"))
        kb.add_atom(S("b"))
        kb.add_atom(S("c"))

        self.assertTrue(kb.replace_atom(S("b"), S("d")))

        self.assertEqualNoOrder(kb.get_atoms(), [S("a"), S("d"), S("c")])

    def test_complex_query(self):
        kb = GroundingSpaceRef()
        kb.add_atom(E(S("A"), S("B")))
        kb.add_atom(E(S("C"), S("B")))

        result = kb.query(E(S(","), E(S("A"), V("x")), E(S("C"), V("x"))))
        self.assertEqualNoOrder(result, [{"x": S("B")}])

    def test_match_nested_grounding_space(self):
        nested = GroundingSpaceRef()
        nested.add_atom(E(S("A"), S("B")))
        space_atom = G(nested)

        runner = MeTTa(env_builder=Environment.test_env())
        runner.space().add_atom(space_atom)
        runner.tokenizer().register_token("nested", lambda token: space_atom)

        result = runner.run("!(match nested (A $x) $x)")
        self.assertEqual([[S("B")]], result)

    def test_python_wrapped_grounding_space(self):
        kb = SpaceRef(GroundingSpace())

        kb.add_atom(S("a"))
        kb.add_atom(S("b"))
        kb.add_atom(S("c"))

        self.assertTrue(kb.remove_atom(S("b")))
        self.assertEqualNoOrder(kb.get_atoms(), [S("a"), S("c")])

        kb.add_atom(E(S("A"), S("B")))
        kb.add_atom(E(S("C"), S("B")))

        result = kb.query(E(S(","), E(S("A"), V("x")), E(S("C"), V("x"))))
        self.assertEqualNoOrder(result, [{"x": S("B")}])

    class ExtendedGroundingSpace(GroundingSpace):
        def query(self, query_atom):
            modified_query = E(S("blue"), query_atom)
            result = super().query(modified_query)
            result.add_var_binding(V("color"), S("blue"))
            return result

    def test_python_extended_grounding_space(self):
        kb = SpaceRef(self.ExtendedGroundingSpace())

        kb.add_atom(E(S("blue"), E(S("A"), S("B"))))
        kb.add_atom(E(S("red"), E(S("A"), S("C"))))

        result = kb.query(E(S("A"), V("x")))
        self.assertEqualNoOrder(result, [{"x": S("B"), "color": S("blue")}])