tests/test_config.py

import sys
import os
import pytest

_this_dir = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, _this_dir)
sys.path.insert(0, os.path.dirname(_this_dir))

from config import AppConfig, ConfigError
from pydantic import ValidationError

def test_app_config_valid_bounds():
    cfg = AppConfig(single_asset_min=0.0, single_asset_max=0.5, sector_limit=0.6)
    assert cfg.single_asset_min == 0.0

def test_app_config_invalid_bounds():
    with pytest.raises(ConfigError, match="single_asset_min cannot be greater than single_asset_max"):
        AppConfig(single_asset_min=0.6, single_asset_max=0.5)

def test_app_config_invalid_sector_limit():
    with pytest.raises(ConfigError, match="sector_limit .* cannot be smaller than single_asset_max"):
        AppConfig(single_asset_max=0.5, sector_limit=0.4)

def test_app_config_invalid_tax_rates():
    with pytest.raises(ConfigError, match="Long-term tax rate is mathematically expected to be <= short-term tax rate"):
        AppConfig(tax_rate_lt=0.4, tax_rate_st=0.2)