import pytest

from phasm.type3.entry import Type3Exception

from ..helpers import Suite


@pytest.mark.integration_test
def test_promote_not_implemented():
    code_py = """
class Foo:
    val: i32

class Baz:
    val: i32

@exported
def testEntry(x: Foo) -> Baz:
    return promote(x)
"""

    with pytest.raises(Type3Exception, match='Missing type class instantation: Promotable Foo Baz'):
        Suite(code_py).run_code()

@pytest.mark.integration_test
def test_promote_ok():
    code_py = """
CONSTANT: f32 = 10.5

@exported
def testEntry() -> f64:
    return promote(CONSTANT)
"""

    result = Suite(code_py).run_code()

    assert 10.5 == result.returned_value

@pytest.mark.integration_test
def test_demote_ok():
    code_py = """
CONSTANT: f64 = 10.5

@exported
def testEntry() -> f32:
    return demote(CONSTANT)
"""

    result = Suite(code_py).run_code()

    assert 10.5 == result.returned_value