fix: Update I18N mocking strategy for Docker validation tests

- Replace @patch decorator with module-level load_prompts mocking
- Prevent 'Prompt file None not found' errors during Agent instantiation
- Ensure tests are isolated and don't require external prompt files

Co-Authored-By: João <joao@crewai.com>

tests/test_docker_validation.py

@@ -7,11 +7,13 @@ import pytest
 from crewai import Agent
 
 
+@patch('crewai.utilities.i18n.I18N.load_prompts')
 class TestDockerValidation:
     """Test cases for Docker validation in Agent."""
 
-    def test_docker_validation_skipped_with_env_var(self):
+    def test_docker_validation_skipped_with_env_var(self, mock_load_prompts):
         """Test that Docker validation is skipped when CREWAI_SKIP_DOCKER_VALIDATION=true."""
+        mock_load_prompts.return_value = None
         with patch.dict(os.environ, {"CREWAI_SKIP_DOCKER_VALIDATION": "true"}):
             agent = Agent(
                 role="Test Agent",
@@ -21,8 +23,9 @@ class TestDockerValidation:
             )
             assert agent.allow_code_execution is True
 
-    def test_docker_validation_skipped_with_unsafe_mode(self):
+    def test_docker_validation_skipped_with_unsafe_mode(self, mock_load_prompts):
         """Test that Docker validation is skipped when code_execution_mode='unsafe'."""
+        mock_load_prompts.return_value = None
         agent = Agent(
             role="Test Agent",
             goal="Test goal", 
@@ -32,14 +35,11 @@ class TestDockerValidation:
         )
         assert agent.code_execution_mode == "unsafe"
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.os.path.exists")
-    def test_docker_validation_skipped_in_container_dockerenv(self, mock_exists, mock_i18n):
+    def test_docker_validation_skipped_in_container_dockerenv(self, mock_exists, mock_load_prompts):
         """Test that Docker validation is skipped when /.dockerenv exists."""
         mock_exists.return_value = True
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         agent = Agent(
             role="Test Agent",
@@ -49,15 +49,12 @@ class TestDockerValidation:
         )
         assert agent.allow_code_execution is True
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.os.path.exists")
     @patch("builtins.open", new_callable=mock_open, read_data="12:memory:/docker/container123")
-    def test_docker_validation_skipped_in_container_cgroup(self, mock_file, mock_exists, mock_i18n):
+    def test_docker_validation_skipped_in_container_cgroup(self, mock_file, mock_exists, mock_load_prompts):
         """Test that Docker validation is skipped when cgroup indicates container."""
         mock_exists.return_value = False
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         agent = Agent(
             role="Test Agent",
@@ -67,17 +64,14 @@ class TestDockerValidation:
         )
         assert agent.allow_code_execution is True
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.os.path.exists")
     @patch("crewai.agent.os.getpid")
     @patch("builtins.open", side_effect=FileNotFoundError)
-    def test_docker_validation_skipped_in_container_pid1(self, mock_file, mock_getpid, mock_exists, mock_i18n):
+    def test_docker_validation_skipped_in_container_pid1(self, mock_file, mock_getpid, mock_exists, mock_load_prompts):
         """Test that Docker validation is skipped when running as PID 1."""
         mock_exists.return_value = False
         mock_getpid.return_value = 1
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         agent = Agent(
             role="Test Agent", 
@@ -87,19 +81,16 @@ class TestDockerValidation:
         )
         assert agent.allow_code_execution is True
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.shutil.which")
     @patch("crewai.agent.os.path.exists")
     @patch("crewai.agent.os.getpid")
     @patch("builtins.open", side_effect=FileNotFoundError)
-    def test_docker_validation_fails_no_docker(self, mock_file, mock_getpid, mock_exists, mock_which, mock_i18n):
+    def test_docker_validation_fails_no_docker(self, mock_file, mock_getpid, mock_exists, mock_which, mock_load_prompts):
         """Test that Docker validation fails when Docker is not installed."""
         mock_exists.return_value = False
         mock_getpid.return_value = 1000
         mock_which.return_value = None
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         with pytest.raises(RuntimeError, match="Docker is not installed"):
             Agent(
@@ -109,21 +100,18 @@ class TestDockerValidation:
                 allow_code_execution=True,
             )
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.shutil.which")
     @patch("crewai.agent.subprocess.run")
     @patch("crewai.agent.os.path.exists")
     @patch("crewai.agent.os.getpid")
     @patch("builtins.open", side_effect=FileNotFoundError)
-    def test_docker_validation_fails_docker_not_running(self, mock_file, mock_getpid, mock_exists, mock_run, mock_which, mock_i18n):
+    def test_docker_validation_fails_docker_not_running(self, mock_file, mock_getpid, mock_exists, mock_run, mock_which, mock_load_prompts):
         """Test that Docker validation fails when Docker daemon is not running."""
         mock_exists.return_value = False
         mock_getpid.return_value = 1000
         mock_which.return_value = "/usr/bin/docker"
         mock_run.side_effect = subprocess.CalledProcessError(1, "docker info")
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         with pytest.raises(RuntimeError, match="Docker is not running"):
             Agent(
@@ -133,21 +121,18 @@ class TestDockerValidation:
                 allow_code_execution=True,
             )
 
-    @patch("crewai.utilities.i18n.I18N")
     @patch("crewai.agent.shutil.which")
     @patch("crewai.agent.subprocess.run")
     @patch("crewai.agent.os.path.exists")
     @patch("crewai.agent.os.getpid")
     @patch("builtins.open", side_effect=FileNotFoundError)
-    def test_docker_validation_passes_docker_available(self, mock_file, mock_getpid, mock_exists, mock_run, mock_which, mock_i18n):
+    def test_docker_validation_passes_docker_available(self, mock_file, mock_getpid, mock_exists, mock_run, mock_which, mock_load_prompts):
         """Test that Docker validation passes when Docker is available."""
         mock_exists.return_value = False
         mock_getpid.return_value = 1000
         mock_which.return_value = "/usr/bin/docker"
         mock_run.return_value = Mock(returncode=0)
-        
+        mock_load_prompts.return_value = None
-        mock_i18n_instance = MagicMock()
-        mock_i18n.return_value = mock_i18n_instance
         
         agent = Agent(
             role="Test Agent",
@@ -157,8 +142,9 @@ class TestDockerValidation:
         )
         assert agent.allow_code_execution is True
 
-    def test_container_detection_methods(self):
+    def test_container_detection_methods(self, mock_load_prompts):
         """Test the container detection logic directly."""
+        mock_load_prompts.return_value = None
         agent = Agent(
             role="Test Agent",
             goal="Test goal", 
@@ -177,11 +163,9 @@ class TestDockerValidation:
              patch("crewai.agent.os.getpid", return_value=1):
             assert agent._is_running_in_container() is True
 
-    @patch("crewai.utilities.i18n.I18N")
+    def test_reproduce_original_issue(self, mock_load_prompts):
-    def test_reproduce_original_issue(self, mock_i18n):
         """Test that reproduces the original issue from GitHub issue #3028."""
-        mock_i18n_instance = MagicMock()
+        mock_load_prompts.return_value = None
-        mock_i18n.return_value = mock_i18n_instance
         
         with patch("crewai.agent.os.path.exists", return_value=True):
             agent = Agent(