import os
import pytest
import config

def test_default_consul_url():
    """Test that the default Consul URL is returned when no env var is set."""
    # Ensure env var is not set
    if "CONSUL_HTTP_ADDR" in os.environ:
        del os.environ["CONSUL_HTTP_ADDR"]
    
    assert config.get_consul_url() == "http://consul.service.dc1.consul:8500"

def test_env_var_consul_url():
    """Test that the environment variable overrides the default."""
    os.environ["CONSUL_HTTP_ADDR"] = "http://10.0.0.1:8500"
    try:
        assert config.get_consul_url() == "http://10.0.0.1:8500"
    finally:
        del os.environ["CONSUL_HTTP_ADDR"]

def test_cli_arg_consul_url():
    """Test that the CLI argument overrides everything."""
    os.environ["CONSUL_HTTP_ADDR"] = "http://10.0.0.1:8500"
    try:
        assert config.get_consul_url("http://cli-override:8500") == "http://cli-override:8500"
    finally:
        del os.environ["CONSUL_HTTP_ADDR"]