# imports
import pytest  # used for our unit tests
from sentry_sdk.utils import _truncate_by_bytes

# unit tests

# Basic Functionality
def test_exact_byte_limit():
    assert _truncate_by_bytes("hello", 5) == "he..."
    assert _truncate_by_bytes("world", 8) == "wor..."

def test_string_shorter_than_byte_limit():
    assert _truncate_by_bytes("hi", 10) == "hi..."
    assert _truncate_by_bytes("test", 10) == "test..."

def test_string_exactly_fitting_byte_limit():
    assert _truncate_by_bytes("hello", 8) == "he..."
    assert _truncate_by_bytes("world", 8) == "wor..."

# Edge Cases
def test_empty_string():
    assert _truncate_by_bytes("", 5) == "..."

def test_very_small_byte_limit():
    assert _truncate_by_bytes("hello", 2) == "..."
    assert _truncate_by_bytes("world", 1) == "..."

def test_non_utf8_characters():
    assert _truncate_by_bytes("你好", 5) == "..."
    assert _truncate_by_bytes("こんにちは", 10) == "..."

# UTF-8 Specific Cases
def test_multi_byte_characters():
    assert _truncate_by_bytes("你好世界", 6) == "你..."
    assert _truncate_by_bytes("こんにちは世界", 10) == "こん..."

def test_mixed_ascii_and_multi_byte_characters():
    assert _truncate_by_bytes("hello 你好", 10) == "hello ..."
    assert _truncate_by_bytes("test こんにちは", 15) == "test こ..."

# Performance and Scalability
def test_large_strings():
    assert _truncate_by_bytes("a" * 10000, 10005) == "a" * 10000 + "..."
    assert _truncate_by_bytes("a" * 1000000, 1000003) == "a" * 1000000 + "..."

# Special Characters
def test_whitespace_characters():
    assert _truncate_by_bytes("a b c d e", 10) == "a b c..."
    assert _truncate_by_bytes("   ", 5) == " ..."

def test_punctuation():
    assert _truncate_by_bytes("hello, world!", 10) == "hello,..."
    assert _truncate_by_bytes("test!@#$%", 8) == "test!..."

# Boundary Conditions
def test_minimum_byte_limit():
    assert _truncate_by_bytes("a", 3) == "..."
    assert _truncate_by_bytes("ab", 4) == "a..."

def test_maximum_byte_limit():
    assert _truncate_by_bytes("a" * 1000, 1003) == "a" * 1000 + "..."
    assert _truncate_by_bytes("a" * 1000, 1004) == "a" * 1000 + "..."

# Mixed Content
def test_alphanumeric_and_symbols():
    assert _truncate_by_bytes("abc123!@#", 10) == "abc123..."
    assert _truncate_by_bytes("xyz789*&^%", 12) == "xyz789*&..."