java - 使用传出 HTTP 请求测试 void 方法

Question

我在 SO 上查找了一些较旧的问题，你们中的大多数人都说，不要测试 void 方法。

我有一个向服务器发送 HTTP 请求的方法，我想我仍然应该测试它，即使该方法无效？如果没有，请告诉我原因，因为例如 dzone 的许多教程都提到您应该测试休息请求。

如果我应该测试它，请帮助我回答什么我必须测试以及如何我这样做，因为 void 不返回任何东西。如果你看到另一个不行，请也告诉我，我想尽可能地改进。

方法如下:

private void buy(double price) {
    final String timestamp = String.valueOf(System.currentTimeMillis());
    final String amount = String.valueOf(observer.requestedAmount);
    final String ressouce = GetValuesTypes.getRessource("user").get(observer.getRelatedUser);

    String queryArgs = "wwww.doSomething.com/" + ressouce;
    String hmac512 = HMAC512.hmac512Digest(queryArgs);

    CloseableHttpClient httpClient = HttpClients.createDefault();
    HttpPost post = new HttpPost(GetValuesTypes.getURL());
    post.addHeader("Key", GetValuesTypes.getKey());
    post.addHeader("Sign", hmac512);
    try {
        post.setEntity(new ByteArrayEntity(queryArgs.getBytes("UTF-8")));
    } catch (UnsupportedEncodingException e) {
        System.out.println("Exception in run");
    }
    List<NameValuePair> params = new ArrayList<>();

    params.add(new BasicNameValuePair("command", "order"));
    params.add(new BasicNameValuePair("ressource", ressource));
    params.add(new BasicNameValuePair("rate", String.valueOf(rate)));
    params.add(new BasicNameValuePair("amount", amount));
    params.add(new BasicNameValuePair("timestamp", timestamp));
    try {
        post.setEntity(new UrlEncodedFormEntity(params));
        CloseableHttpResponse response = httpClient.execute(post);
        HttpEntity entity = response.getEntity();
        Scanner in = new Scanner(entity.getContent());
        String orderNumber = "";
        while (in.hasNext()) {
            orderNumber = in.nextLine();
        }
        String[] findOrderNumber = orderNumber.split(".");
        long lastOrderNumber = -1;
        try {
            lastOrderNumber = Long.valueOf(findOrderNumber[3]);
        } catch (NumberFormatException exception) {
            System.out.println("NumberFormatException");
        } finally {
            if (lastOrderNumber != -1) {
                observer.setOrderNumber(lastOrderNumber);
            }
        }
        in.close();
        EntityUtils.consume(entity);
        httpClient.close();
    } catch (IOException e) {
        System.out.println("Exception occured during process");
    }
}

Answer 1

你不应该直接测试 private 方法。相关主题:

• How do I test a class that has private methods, fields or inner classes?
• Should I test private methods or only public ones?
• How should I test private methods in Java?
• How do you unit test private methods?

但是，如果您正在测试并且需要模拟它，您可以使用 PowerMock - 允许您对通常被视为不可测试的代码进行单元测试的 Java 框架。代码示例:Mockito Mock Private Method Example with PowerMock