def test_reify():
x, y, z = var(), var(), var()
s = {x: 1, y: 2, z: (x, y)}
assert reify(x, s) == 1
assert reify(10, s) == 10
assert reify((1, y), s) == (1, 2)
assert reify((1, (x, (y, 2))), s) == (1, (1, (2, 2)))
assert reify(z, s) == (1, 2)
def test_list_1():
from logpy import run, eq
from logpy.unify import unify_dispatch, reify_dispatch
unify_dispatch[(Foo, Foo)] = unify_object
reify_dispatch[Foo] = reify_object
x = var('x')
y = var('y')
rval = run(0, (x, y), (eq, Foo(1, [2]), Foo(x, [y])))
assert rval == ((1, 2),)
rval = run(0, (x, y), (eq, Foo(1, [2]), Foo(x, y)))
assert rval == ((1, [2]),)
del reify_dispatch[Foo]
del unify_dispatch[(Foo, Foo)]
def test_unify_complex():
assert unify((1, {2: 3}), (1, {2: 3}), {}) == {}
assert unify((1, {2: 3}), (1, {2: 4}), {}) == False
assert unify((1, {2: var(5)}), (1, {2: 4}), {}) == {var(5): 4}
assert unify({1: (2, 3)}, {1: (2, var(5))}, {}) == {var(5): 3}
assert unify({1: [2, 3]}, {1: [2, var(5)]}, {}) == {var(5): 3}
def test_objects_full():
from logpy.unify import unify_dispatch, reify_dispatch
unify_dispatch[(Foo, Foo)] = unify_object
unify_dispatch[(Bar, Bar)] = unify_object
reify_dispatch[Foo] = reify_object
reify_dispatch[Bar] = reify_object
assert unify_object(Foo(1, Bar(2)), Foo(1, Bar(var(3))), {}) == {var(3): 2}
assert reify(Foo(var('a'), Bar(Foo(var('b'), 3))),
{var('a'): 1, var('b'): 2}) == Foo(1, Bar(Foo(2, 3)))
del reify_dispatch[Bar]
del reify_dispatch[Foo]
del unify_dispatch[(Foo, Foo)]
del unify_dispatch[(Bar, Bar)]
def test_reify_object():
obj = reify_object(Foo(1, var(3)), {var(3): 4})
assert obj.a == 1
assert obj.b == 4
def test_unify_object():
assert unify_object(Foo(1, 2), Foo(1, 2), {}) == {}
assert unify_object(Foo(1, 2), Foo(1, 3), {}) == False
assert unify_object(Foo(1, 2), Foo(1, var(3)), {}) == {var(3): 2}
def test_unify_dict():
assert unify_dict({1: 2}, {1: 2}, {}) == {}
assert unify_dict({1: 2}, {1: 3}, {}) == False
assert unify_dict({2: 2}, {1: 2}, {}) == False
assert unify_dict({1: var(5)}, {1: 2}, {}) == {var(5): 2}
def test_unify_seq():
assert unify_seq((1, 2), (1, 2), {}) == {}
assert unify_seq([1, 2], [1, 2], {}) == {}
assert unify_seq((1, 2), (1, 2, 3), {}) == False
assert unify_seq((1, var(1)), (1, 2), {}) == {var(1): 2}
assert unify_seq((1, var(1)), (1, 2), {var(1): 3}) == False
def test_unify():
assert unify(1, 1, {}) == {}
assert unify(1, 2, {}) == False
assert unify(var(1), 2, {}) == {var(1): 2}
assert unify(2, var(1), {}) == {var(1): 2}
def test_reify_complex():
x, y = var(), var()
s = {x: 2, y: 4}
e = {1: [x], 3: (y, 5)}
assert reify(e, s) == {1: [2], 3: (4, 5)}
def test_reify_list():
x, y = var(), var()
s = {x: 2, y: 4}
e = [1, [x, 3], y]
assert reify_list(e, s) == [1, [2, 3], 4]
def test_reify_dict():
x, y = var(), var()
s = {x: 2, y: 4}
e = {1: x, 3: {5: y}}
assert reify_dict(e, s) == {1: 2, 3: {5: 4}}
def test_var():
assert var(1) == var(1)
assert var() != var()
def test_isvar():
assert not isvar(3)
assert isvar(var(3))
def test_var_inputs():
assert var(1) == var(1)
assert var() != var()