from conftest import create_session, join_student


def test_csv_export_contains_one_row_per_submission(client, sample_pool):
    sid = create_session(client, sample_pool)
    join_student(client, sid, "s1", "Student One")
    rooms = client.app.state.rooms
    client.portal.call(rooms.open_question, sid, 0, 2)
    ack = client.portal.call(rooms.submit_answer, sid, "s1", 0, "B")
    assert ack["type"] == "submit_ack"
    client.portal.call(rooms.close_question, sid)

    response = client.get(f"/admin/api/sessions/{sid}/csv")
    lines = response.text.strip().splitlines()
    assert lines[0] == "sid,student_id,name,question_idx,answer,elapsed_ms,score,status"
    assert len(lines) == 2
    assert ",s1,Student One,0,B," in lines[1]