Copilot

# Copilot이 자동완성하는 전형적인 패턴들

# 1. 주석만 쓰면 구현을 생성
# Function to validate email address using regex
def validate_email(email: str) -> bool:
    import re
    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
    return bool(re.match(pattern, email))

# 2. 함수 시그니처만 쓰면 바디를 생성
def calculate_age(birth_date: str) -> int:
    from datetime import datetime
    birth = datetime.strptime(birth_date, "%Y-%m-%d")
    today = datetime.today()
    age = today.year - birth.year
    if (today.month, today.day) < (birth.month, birth.day):
        age -= 1
    return age

# 3. 테스트 코드 자동 생성 (test_ 접두사 인식)
def test_validate_email():
    # Valid emails
    assert validate_email("user@example.com") == True
    assert validate_email("user.name+tag@example.co.uk") == True

    # Invalid emails
    assert validate_email("invalid-email") == False
    assert validate_email("missing@domain") == False
    assert validate_email("@no-local-part.com") == False

# 4. 타입 힌트 기반 자동완성
from dataclasses import dataclass
from typing import Optional, List

@dataclass
class User:
    id: int
    name: str
    email: str
    roles: List[str]
    is_active: bool = True
    profile_url: Optional[str] = None

    def has_role(self, role: str) -> bool:
        return role in self.roles

    def deactivate(self) -> None:
        self.is_active = False