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import unittest
from pdf2zh import cache
import threading
import multiprocessing
import random
import string
class TestCache(unittest.TestCase):
def setUp(self):
self.test_db = cache.init_test_db()
def tearDown(self):
# Clean up
cache.clean_test_db(self.test_db)
def test_basic_set_get(self):
"""Test basic set and get operations"""
cache_instance = cache.TranslationCache("test_engine")
# Test get with non-existent entry
result = cache_instance.get("hello")
self.assertIsNone(result)
# Test set and get
cache_instance.set("hello", "你好")
result = cache_instance.get("hello")
self.assertEqual(result, "你好")
def test_cache_overwrite(self):
"""Test that cache entries can be overwritten"""
cache_instance = cache.TranslationCache("test_engine")
# Set initial translation
cache_instance.set("hello", "你好")
# Overwrite with new translation
cache_instance.set("hello", "您好")
# Verify the new translation is returned
result = cache_instance.get("hello")
self.assertEqual(result, "您好")
def test_non_string_params(self):
"""Test that non-string parameters are automatically converted to JSON"""
params = {"model": "gpt-3.5", "temperature": 0.7}
cache_instance = cache.TranslationCache("test_engine", params)
# Test that params are converted to JSON string internally
cache_instance.set("hello", "你好")
result = cache_instance.get("hello")
self.assertEqual(result, "你好")
# Test with different param types
array_params = ["param1", "param2"]
cache_instance2 = cache.TranslationCache("test_engine", array_params)
cache_instance2.set("hello", "你好2")
self.assertEqual(cache_instance2.get("hello"), "你好2")
# Test with nested structures
nested_params = {"options": {"temp": 0.8, "models": ["a", "b"]}}
cache_instance3 = cache.TranslationCache("test_engine", nested_params)
cache_instance3.set("hello", "你好3")
self.assertEqual(cache_instance3.get("hello"), "你好3")
def test_engine_distinction(self):
"""Test that cache distinguishes between different translation engines"""
cache1 = cache.TranslationCache("engine1")
cache2 = cache.TranslationCache("engine2")
# Set same text with different engines
cache1.set("hello", "你好 1")
cache2.set("hello", "你好 2")
# Verify each engine gets its own translation
self.assertEqual(cache1.get("hello"), "你好 1")
self.assertEqual(cache2.get("hello"), "你好 2")
def test_params_distinction(self):
"""Test that cache distinguishes between different engine parameters"""
params1 = {"param": "value1"}
params2 = {"param": "value2"}
cache1 = cache.TranslationCache("test_engine", params1)
cache2 = cache.TranslationCache("test_engine", params2)
# Set same text with different parameters
cache1.set("hello", "你好 1")
cache2.set("hello", "你好 2")
# Verify each parameter set gets its own translation
self.assertEqual(cache1.get("hello"), "你好 1")
self.assertEqual(cache2.get("hello"), "你好 2")
def test_consistent_param_serialization(self):
"""Test that dictionary parameters are consistently serialized regardless of key order"""
# Test simple dictionary
params1 = {"b": 1, "a": 2}
params2 = {"a": 2, "b": 1}
cache1 = cache.TranslationCache("test_engine", params1)
cache2 = cache.TranslationCache("test_engine", params2)
self.assertEqual(cache1.translate_engine_params, cache2.translate_engine_params)
# Test nested dictionary
params1 = {"outer2": {"inner2": 2, "inner1": 1}, "outer1": 3}
params2 = {"outer1": 3, "outer2": {"inner1": 1, "inner2": 2}}
cache1 = cache.TranslationCache("test_engine", params1)
cache2 = cache.TranslationCache("test_engine", params2)
self.assertEqual(cache1.translate_engine_params, cache2.translate_engine_params)
# Test dictionary with list of dictionaries
params1 = {"b": [{"y": 1, "x": 2}], "a": 3}
params2 = {"a": 3, "b": [{"x": 2, "y": 1}]}
cache1 = cache.TranslationCache("test_engine", params1)
cache2 = cache.TranslationCache("test_engine", params2)
self.assertEqual(cache1.translate_engine_params, cache2.translate_engine_params)
# Test that different values still produce different results
params1 = {"a": 1, "b": 2}
params2 = {"a": 2, "b": 1}
cache1 = cache.TranslationCache("test_engine", params1)
cache2 = cache.TranslationCache("test_engine", params2)
self.assertNotEqual(
cache1.translate_engine_params, cache2.translate_engine_params
)
def test_cache_with_sorted_params(self):
"""Test that cache works correctly with sorted parameters"""
params1 = {"b": [{"y": 1, "x": 2}], "a": 3}
params2 = {"a": 3, "b": [{"x": 2, "y": 1}]}
# Both caches should work with the same key
cache1 = cache.TranslationCache("test_engine", params1)
cache1.set("hello", "你好")
cache2 = cache.TranslationCache("test_engine", params2)
self.assertEqual(cache2.get("hello"), "你好")
def test_append_params(self):
"""Test the append_params method"""
cache_instance = cache.TranslationCache("test_engine", {"initial": "value"})
# Test appending new parameter
cache_instance.add_params("new_param", "new_value")
self.assertEqual(
cache_instance.params, {"initial": "value", "new_param": "new_value"}
)
# Test that cache with appended params works correctly
cache_instance.set("hello", "你好")
self.assertEqual(cache_instance.get("hello"), "你好")
# Test overwriting existing parameter
cache_instance.add_params("initial", "new_value")
self.assertEqual(
cache_instance.params, {"initial": "new_value", "new_param": "new_value"}
)
# Cache should work with updated params
cache_instance.set("hello2", "你好2")
self.assertEqual(cache_instance.get("hello2"), "你好2")
# Sometimes the problem of "database is locked" occurs. Temporarily disable this test.
# def test_thread_safety(self):
# """Test thread safety of cache operations"""
# cache_instance = cache.TranslationCache("test_engine")
# lock = threading.Lock()
# results = []
# num_threads = multiprocessing.cpu_count()
# items_per_thread = 100
# def generate_random_text(length=10):
# return "".join(
# random.choices(string.ascii_letters + string.digits, k=length)
# )
# def worker():
# thread_results = [] # 线程本地存储结果
# for _ in range(items_per_thread):
# text = generate_random_text()
# translation = f"翻译_{text}"
# # Write operation
# cache_instance.set(text, translation)
# # Read operation - verify our own write
# result = cache_instance.get(text)
# thread_results.append((text, result))
# # 所有操作完成后，一次性加锁并追加结果
# with lock:
# results.extend(thread_results)
# # Create threads equal to CPU core count
# threads = []
# for _ in range(num_threads):
# thread = threading.Thread(target=worker)
# threads.append(thread)
# thread.start()
# # Wait for all threads to complete
# for thread in threads:
# thread.join()
# # Verify all operations were successful
# expected_total = num_threads * items_per_thread
# self.assertEqual(len(results), expected_total)
# # Verify each thread got its correct value
# for text, result in results:
# expected = f"翻译_{text}"
# self.assertEqual(result, expected)
if __name__ == "__main__":
unittest.main()
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