docstr: If we have a validate function and it returns False, we recompute our cached value.
code: def test_validate_fail(self):
      """If we have a validate function and it returns False, we recompute our cached value."""
      validate = Mock(return_value=False)
  
      call_count: List[int] = [0]
  
      @st.cache_resource(validate=validate)
      def f() -> int:
          call_count[0] += 1
          return call_count[0]
  
      # First call: call_count == 1; validate not called (because we computed a new value)
      expected_call_count = 1
      self.assertEqual(expected_call_count, f())
      validate.assert_not_called()
  
      # Subsequent calls: call_count increases; validate called with previous value
      for _ in range(3):
          expected_call_count += 1
          self.assertEqual(expected_call_count, f())
          validate.assert_called_once_with(expected_call_count - 1)
          validate.reset_mock()
  
imports: import threading
  import unittest
  from typing import Any, List
  from unittest.mock import Mock, patch
  from parameterized import parameterized
  import streamlit
  from streamlit.runtime.caching import cache_resource_api, get_resource_cache_stats_provider
  from streamlit.runtime.caching.cache_type import CacheType
  from streamlit.runtime.caching.cached_message_replay import MultiCacheResults
  from streamlit.runtime.caching.hashing import UserHashError
  from streamlit.runtime.scriptrunner import add_script_run_ctx
  from streamlit.runtime.stats import CacheStat
  from streamlit.vendor.pympler.asizeof import asizeof
  from tests.streamlit.runtime.caching.common_cache_test import as_cached_result
  from tests.testutil import create_mock_script_run_ctx
label_desc: Use image node_id 4 for calling the CacheResourceValidateTest obj's underlying member method code with example usage: obj.test_validate_fail() and returns: call_count