Pricing linked

modules/purchase_trade/tests/test_module.py

@@ -2537,9 +2537,20 @@ class PurchaseTradeTestCase(ModuleTestCase):
 
         self.assertEqual(fee.on_change_with_quantity(), Decimal('25'))
 
-    def test_fee_currency_is_required(self):
-        'fee currency is required for every fee mode'
-        self.assertTrue(fee_module.Fee.currency.required)
+    def test_fee_currency_is_conditionally_required_for_linked_currency(self):
+        'fee currency does not block linked currency draft saves'
+        self.assertFalse(fee_module.Fee.currency.required)
+        self.assertIn('required', fee_module.Fee.currency.states)
+        self.assertEqual(
+            fee_module.Fee.currency.states['required'],
+            ~Eval('enable_linked_currency'))
+
+        for field in (
+                fee_module.Fee.linked_price,
+                fee_module.Fee.linked_currency,
+                fee_module.Fee.linked_unit):
+            self.assertFalse(field.required)
+            self.assertNotIn('required', field.states)
 
     def test_fee_get_non_cog_returns_zero_without_move_lines(self):
         'fee non-cog amount is zero before any accounting move line exists'