java - Java 断言错误

Question

我正在尝试 assertEquals 2 个数组列表。即使列表相同，我也会在控制台中收到错误任何想法这里出了什么问题？任何帮助，将不胜感激..

从数据库中提取数据并将其放入地图

    public Map<String, List<Products>> Req1() throws SQLException {

        BaseQuery bq = new BaseQuery("root", "georgespc");

        List<String> columns = new ArrayList<String>();
        columns.add("productCode");
        columns.add("productName");
        columns.add("productLine"); // 2
        columns.add("productScale");
        columns.add("productVendor");
        columns.add("productDescription");
        columns.add("quantityInStock");
        columns.add("buyPrice");
        columns.add("MSRP");

        ArrayList<ArrayList<Object>> tableOfProducts = bq.select(columns, "products");

        List<String> productLines = new ArrayList<String>();

        Map<String, List<Products>> lineWithProducts = new HashMap<String, List<Products>>();

        for (int i = 0; i < tableOfProducts.size(); i++) {

            if (!productLines.contains(tableOfProducts.get(i).get(2))) {
                productLines.add(tableOfProducts.get(i).get(2).toString());
                lineWithProducts.put(tableOfProducts.get(i).get(2).toString(), new ArrayList<Products>());
            }

        }

        for (int i = 0; i < tableOfProducts.size(); i++) {

            String ID = tableOfProducts.get(i).get(0).toString();
            String name = tableOfProducts.get(i).get(1).toString();
            String line = tableOfProducts.get(i).get(2).toString();
            String scale = tableOfProducts.get(i).get(3).toString();
            String vendor = tableOfProducts.get(i).get(4).toString();
            String desc = tableOfProducts.get(i).get(5).toString();
            Integer quantity = (Integer) tableOfProducts.get(i).get(6);
            BigDecimal price = (BigDecimal) tableOfProducts.get(i).get(7);
            BigDecimal msrp = (BigDecimal) tableOfProducts.get(i).get(8);

            Products p = new Products(ID, name, line, scale, vendor, desc, quantity, price, msrp);

            if (!lineWithProducts.get(line).contains(p)) {
                lineWithProducts.get(line).add(p);
            }

        }

        return lineWithProducts;

    }

测试班

    @Test
    public void test() throws SQLException {
        Map<String, List<Products>> lineWithProducts = new HashMap<String, List<Products>>();
        BaseQuery bq = new BaseQuery("root", "georgespc");
        SetH_req1 requirements = new SetH_req1();

        ResultSet rs = bq.query("select productline from productLines");
        ResultSetMetaData rsmd = rs.getMetaData();

        while (rs.next()) {


            for (int i = 1; i <= rsmd.getColumnCount(); i++) {
                String columnValue = rs.getString(i);
                lineWithProducts.put(columnValue, new ArrayList<Products>());

            }

        }

        rs = bq.query(
                "select productCode, productName, productline, productScale, productVendor, productDescription, quantityInStock, buyPrice, MSRP "
                        + "from products where productline='motorcycles'");
        rsmd = rs.getMetaData();
        System.out.println("\n\n\n\n");

        String line = null;

        while (rs.next()) {

            Products p = null;

            for (int i = 1; i <= rsmd.getColumnCount(); i++) {

                String ID = rs.getString(1);
                String name = rs.getString(2);
                line = rs.getString(3);
                String scale = rs.getString(4);
                String vendor = rs.getString(5);
                String desc = rs.getString(6);
                Integer quantity = rs.getInt(7);
                BigDecimal price = rs.getBigDecimal(8);
                BigDecimal msrp = rs.getBigDecimal(9);

                p = new Products(ID, name, line, scale, vendor, desc, quantity, price, msrp);

            }


            if (!lineWithProducts.get(line).contains(p)) {
                lineWithProducts.get(line).add(p);
            } 


        }

        assertEquals(requirements.Req1().get(line).get(1), lineWithProducts.get(line).get(1));

错误

java.lang.AssertionError：预期：com.com1028.assignment.Products<

ID=S10_2016, name=1996 Moto Guzzi 1100i, productType=Motorcycles, productScale=1:10, vendor=Highway 66 Mini Classics, description=Moto Guzzi 官方标志和徽章，位于摩托车侧面的马鞍包，详细的发动机，工作转向, 工作悬架, 两个真皮座椅, 行李架, 双排气管, 位于车把上的小马鞍包, 带有镀铬装饰的双色油漆, 卓越的压铸细节, 旋转轮子, 工作脚架, 压铸金属与塑料部件和烤瓷漆，库存=6625，价格=68.99，MRSP=118.94

但是是：com.com1028.assignment.Products<

ID=S10_2016, name=1996 Moto Guzzi 1100i, productType=Motorcycles, productScale=1:10, vendor=Highway 66 Mini Classics, description=Moto Guzzi 官方标志和徽章，位于摩托车侧面的马鞍包，详细的发动机，工作转向, 工作悬架, 两个真皮座椅, 行李架, 双排气管, 位于车把上的小马鞍包, 带有镀铬装饰的双色油漆, 卓越的压铸细节, 旋转轮子, 工作脚架, 压铸金属与塑料部件和烤瓷漆，库存=6625，价格=68.99，MRSP=118.94

>

标签： javaclasstestingarraylistjunit4

Answer 1

您正在比较两个Products对象，因此您应该确保覆盖该类的equals方法。例如：

@Override
public boolean equals(final Object o) {
    if (o == null || this.getClass() != o.getClass()) {
        return false;
    }
    final Products products = (Products) o;
    return Objects.equals(this.id, products.id) &&
            Objects.equals(this.name, products.name) &&
            Objects.equals(this.line, products.line) &&
            Objects.equals(this.scale, products.scale) &&
            Objects.equals(this.vendor, products.vendor) &&
            Objects.equals(this.desc, products.desc) &&
            Objects.equals(this.quantity, products.quantity) &&
            Objects.equals(this.price, products.price) &&
            Objects.equals(this.msrp, products.msrp);
}

当然，如果你覆盖equals，你也应该覆盖hashCode：

@Override
public int hashCode() {
    return Objects.hash(
            this.id,
            this.name, 
            this.line, 
            this.scale, 
            this.vendor, 
            this.desc, 
            this.quantity, 
            this.price, 
            this.msrp);
}