CharMappingItem item = new CharMappingItem(1L, inputs, "oldOutput");

        item.setNewInputs(new String[] { "new1", "new2", "new3" });
        item.setNewOutput("newOutput");

        // Should use new values when updated
        assertEquals("new1,new2,new3=>newOutput", item.toLineString());
    }

    public void test_toLineString_withSingleInput() {
        String[] inputs = { "single" };

        }
    }

    // Test update with InputStream
    public void test_update_withInputStream() throws IOException {
        String content = "new1\n" + "new2\n" + "new3\n";

        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
        stopwordsFile.update(is);

        assertEquals(3, stopwordsFile.stopwordsItemList.size());

	}

	// Code changed, price should changed
	DB.Model(&product).Select("Name", "Code", "Price").Updates(map[string]interface{}{"Name": "Product New3", "code": "L1213"})

	if product.Name != "Product New3" || product.Price != 220 || product.Code != "L1213" {
		t.Errorf("invalid data after update, got %+v", product)
	}

	var result Product3
	DB.First(&result, product.ID)