from fastapi.testclient import TestClient
from app.main import app

client = TestClient(app)


def test_case_sensitive_headers_preserves_case():
    response = client.get(
        "/ping",
        headers={"X-Custom-Header": "value", "User-Agent": "test"},
    )
    assert response.status_code == 200


def test_case_sensitive_headers_no_raw_headers():
    response = client.get("/ping", headers={})
    assert response.status_code == 200


def test_case_sensitive_headers_post_with_content_type():
    response = client.post(
        "/api/v1/visit",
        json={"url": "https://example.com"},
        headers={"X-Custom-Header": "value", "Content-Type": "application/json"},
    )
    assert response.status_code in (200, 422)


def test_valid_headers_filtering():
    response = client.get(
        "/api/v1/ping",
        headers={"User-Agent": "test"},
    )
    assert response.status_code == 200