[erp5_hal_json_style] Add test for failing dialog with HTTP400 and field errors

bt5/erp5_hal_json_style/TestTemplateItem/portal_components/test.erp5.testHalJsonStyle.py

@@ -50,7 +50,7 @@ def simulate(script_id, params_string, code_string):
 def createIndexedDocument():
   def decorator(func):
     def wrapped(self, *args, **kwargs):
-      self._makeDocument()
+      kwargs.update(document=self._makeDocument())
       self.portal.portal_caches.clearAllCache()
       self.tic()
       return func(self, *args, **kwargs)
@@ -1062,7 +1062,7 @@ class TestERP5Document_getHateoas_mode_worklist(ERP5HALJSONStyleSkinsMixin):
             'return "application/hal+json"')
   @createIndexedDocument()
   @changeSkin('Hal')
-  def test_getHateoasWorklist_default_view(self):
+  def test_getHateoasWorklist_default_view(self, document):
     # self._makeDocument()
     fake_request = do_fake_request("GET")
     result = self.portal.web_site_module.hateoas.ERP5Document_getHateoas(
@@ -1203,3 +1203,36 @@ return msg"
     )
     result_dict = json.loads(result)
     self.assertEqual(result_dict['title'], 'Foo_zhongwen')
+
+
+class TestERP5Action_getHateoas(ERP5HALJSONStyleSkinsMixin):
+
+  @simulate('Base_getRequestUrl', '*args, **kwargs',
+      'return "http://example.org/foo"')
+  @simulate('Base_getRequestHeader', '*args, **kwargs',
+            'return "application/hal+json"')
+  @changeSkin('Hal')
+  @createIndexedDocument()
+  def test_getHateoasDialog_dialog_failure(self, document):
+    """Test an dialog on Foo object with empty required for a failure.
+    
+    Expected behaviour is response Http 400 with field errors.
+    """
+    fake_request = do_fake_request("POST")
+    # user form fields (no need to set meta-fields because we pass them directly to script)
+    fake_request.set('field_your_workflow_action', 'custom_dialog_required_action')
+    fake_request.set('field_your_comment', 'My comment')
+    fake_request.set('field_your_custom_workflow_variable',  '')  # empty required field!
+    # call the standard dialog submit script
+    response = document.Base_callDialogMethod(
+      REQUEST=fake_request,
+      dialog_method='Foo_doNothing',  # 'Workflow_statusModify' would lead us to different code path,
+      dialog_id='Foo_viewCustomWorkflowRequiredActionDialog',
+    )
+    response = json.loads(response)
+    self.assertEqual(fake_request.RESPONSE.status, 400)
+    self.assertIn('your_custom_workflow_variable', response, "Invalid field '{}' must be in the response {!s}".format(
+      'your_custom_workflow_variable', response))
+    self.assertIn('error_text', response['your_custom_workflow_variable'], "Invalid field must contain error message")
+    self.assertGreater(len(response['your_custom_workflow_variable']['error_text']), 0, "Error message must not be empty")
+    
\ No newline at end of file