reflex/tests/components/core/test_cond.py

import json
from typing import Any, Union

import pytest

from reflex.components.base.fragment import Fragment
from reflex.components.core.cond import Cond, cond
from reflex.components.radix.themes.typography.text import Text
from reflex.ivars.base import ImmutableVar, LiteralVar, immutable_computed_var
from reflex.state import BaseState, State
from reflex.utils.format import format_state_name


@pytest.fixture
def cond_state(request):
    class CondState(BaseState):
        value: request.param["value_type"] = request.param["value"]  # noqa

    return CondState


def test_f_string_cond_interpolation():
    # make sure backticks inside interpolation don't get escaped
    var = LiteralVar.create(f"x {cond(True, 'a', 'b')}")
    assert str(var) == '("x "+(true ? "a" : "b"))'


@pytest.mark.parametrize(
    "cond_state",
    [
        pytest.param({"value_type": bool, "value": True}),
        pytest.param({"value_type": int, "value": 0}),
        pytest.param({"value_type": str, "value": "true"}),
    ],
    indirect=True,
)
def test_validate_cond(cond_state: BaseState):
    """Test if cond can be a rx.Var with any values.

    Args:
        cond_state: A fixture.
    """
    cond_component = cond(
        cond_state.value,
        Text.create("cond is True"),
        Text.create("cond is False"),
    )
    cond_dict = cond_component.render() if type(cond_component) == Fragment else {}
    assert cond_dict["name"] == "Fragment"

    [condition] = cond_dict["children"]
    assert condition["cond_state"] == f"isTrue({cond_state.get_full_name()}.value)"

    # true value
    true_value = condition["true_value"]
    assert true_value["name"] == "Fragment"

    [true_value_text] = true_value["children"]
    assert true_value_text["name"] == "RadixThemesText"
    assert true_value_text["children"][0]["contents"] == '{"cond is True"}'

    # false value
    false_value = condition["false_value"]
    assert false_value["name"] == "Fragment"

    [false_value_text] = false_value["children"]
    assert false_value_text["name"] == "RadixThemesText"
    assert false_value_text["children"][0]["contents"] == '{"cond is False"}'


@pytest.mark.parametrize(
    "c1, c2",
    [
        (True, False),
        (32, 0),
        ("hello", ""),
        (2.3, 0.0),
        (LiteralVar.create("a"), LiteralVar.create("b")),
    ],
)
def test_prop_cond(c1: Any, c2: Any):
    """Test if cond can be a prop.

    Args:
        c1: truth condition value
        c2: false condition value
    """
    prop_cond = cond(
        True,
        c1,
        c2,
    )

    assert isinstance(prop_cond, ImmutableVar)
    if not isinstance(c1, ImmutableVar):
        c1 = json.dumps(c1)
    if not isinstance(c2, ImmutableVar):
        c2 = json.dumps(c2)
    assert str(prop_cond) == f"(true ? {str(c1)} : {str(c2)})"


def test_cond_no_mix():
    """Test if cond can't mix components and props."""
    with pytest.raises(ValueError):
        cond(True, LiteralVar.create("hello"), Text.create("world"))


def test_cond_no_else():
    """Test if cond can be used without else."""
    # Components should support the use of cond without else
    comp = cond(True, Text.create("hello"))
    assert isinstance(comp, Fragment)
    comp = comp.children[0]
    assert isinstance(comp, Cond)
    assert comp.cond._decode() is True  # type: ignore
    assert comp.comp1.render() == Fragment.create(Text.create("hello")).render()
    assert comp.comp2 == Fragment.create()

    # Props do not support the use of cond without else
    with pytest.raises(ValueError):
        cond(True, "hello")  # type: ignore


def test_cond_computed_var():
    """Test if cond works with computed vars."""

    class CondStateComputed(State):
        @immutable_computed_var
        def computed_int(self) -> int:
            return 0

        @immutable_computed_var
        def computed_str(self) -> str:
            return "a string"

    comp = cond(True, CondStateComputed.computed_int, CondStateComputed.computed_str)

    # TODO: shouln't this be a ComputedVar?
    assert isinstance(comp, ImmutableVar)

    state_name = format_state_name(CondStateComputed.get_full_name())
    assert (
        str(comp) == f"(true ? {state_name}.computed_int : {state_name}.computed_str)"
    )

    assert comp._var_type == Union[int, str]