MM-15128 change openDialog to allow dialogs with no elements (#10755)

api4/integration_action.go

@@ -79,11 +79,6 @@ func openDialog(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if dialog.Dialog.Elements == nil || len(dialog.Dialog.Elements) == 0 {
-		c.SetInvalidParam("dialog.elements")
-		return
-	}
-
 	if err := c.App.OpenInteractiveDialog(dialog); err != nil {
 		c.Err = err
 		return

api4/integration_action_test.go

@@ -142,16 +142,16 @@ func TestOpenDialog(t *testing.T) {
 	CheckBadRequestStatus(t, resp)
 	assert.False(t, pass)
 
-	// At least one element is required
+	// Should pass with no elements
 	request.URL = "http://localhost:8065"
 	request.Dialog.Elements = nil
 	pass, resp = Client.OpenInteractiveDialog(request)
-	CheckBadRequestStatus(t, resp)
-	assert.False(t, pass)
+	CheckNoError(t, resp)
+	assert.True(t, pass)
 	request.Dialog.Elements = []model.DialogElement{}
 	pass, resp = Client.OpenInteractiveDialog(request)
-	CheckBadRequestStatus(t, resp)
-	assert.False(t, pass)
+	CheckNoError(t, resp)
+	assert.True(t, pass)
 }
 
 func TestSubmitDialog(t *testing.T) {