setupMockConfig("localhost:9200,localhost:9201,localhost:9202", "", "");

        curlHelper.init();

        NodeManager nodeManager = getNodeManager(curlHelper);
        assertNotNull(nodeManager);
    }

    @Test
    public void test_init_hostsWithSpaces() {
        setupMockConfig(" localhost:9200 , localhost:9201 , localhost:9202 ", "", "");

        curlHelper.init();

		{[]string{"http://localhost:9000/d1", "http://localhost:9001/d2", "http://localhost:9002/d3", "http://localhost:9003/d4"}, []string{"localhost:9000", "localhost:9001", "localhost:9002", "localhost:9003"}, "localhost:9000"},
	}

        if (localhost.getHostAddress().contains(":")) {
            // IPv6 localhost
            String opensearchUrl = IpAddressUtil.buildUrl("http", localhost, 9200, "");
            assertTrue(opensearchUrl.matches("http://\\[.*\\]:9200"));
        } else {
            // IPv4 localhost
            String opensearchUrl = IpAddressUtil.buildUrl("http", localhost, 9200, "");

	}{
		// Invalid inputs
		{"https://localhost:2379,http://localhost:2380", nil, false, false},
		{",,,", nil, false, false},
		{"", nil, false, false},
		{"ftp://localhost:2379", nil, false, false},
		{"http://localhost:2379000", nil, false, false},

		// Valid inputs
		{
			"https://localhost:2379,https://localhost:2380",
			[]string{
				"https://localhost:2379", "https://localhost:2380",
			},
			true, true,
		},

	// addresses. I.e, 0.0.0.0:9000 like ":9000" refers to port
	// 9000 on localhost.
	if host.Name != "" && host.Name != net.IPv4zero.String() && host.Name != net.IPv6zero.String() {
		localHost, err := isLocalHost(host.Name, host.Port.String(), host.Port.String())
		if err != nil {
			return err
		}
		if !localHost {
			return config.ErrInvalidAddressFlag(nil).Msg("host in server address should be this server")
		}

        pathMapping.setReplacement("http://localhost/");
        pathMappingList.add(pathMapping);

        pathMappingHelper.cachedPathMappingList = pathMappingList;

        String text = "\"file:///home/\"";
        assertEquals("\"http://localhost/\"", pathMappingHelper.replaceUrls(text));

        text = "\"file:///home/user/\"";
        assertEquals("\"http://localhost/user/\"", pathMappingHelper.replaceUrls(text));

		},
		// Keys and input order of k=v is same.
		{
			input: `connection_string="host=localhost port=2832" comment="really long comment"`,
			keys:  []string{"connection_string", "comment"},
			expectedFields: map[string]struct{}{
				`connection_string="host=localhost port=2832"`: {},
				`comment="really long comment"`:                {},
			},
		},
		// Keys with spaces in between
		{

		{"", "", false, errors.New("unable to process empty address")},
		{":9000", ":9000", true, nil},
		{"localhost:9000", ":9000", true, nil},
		{"localhost:9000", "http://localhost:9000", true, nil},
		{"http://localhost:9000", ":9000", true, nil},
		{"http://localhost:9000", "http://localhost:9000", true, nil},
		{"http://8.8.8.8:9000", "http://localhost:9000", false, nil},
	}

	for _, testCase := range testCases {

## Origin { #origin }

An origin is the combination of protocol (`http`, `https`), domain (`myapp.com`, `localhost`, `localhost.tiangolo.com`), and port (`80`, `443`, `8080`).

So, all these are different origins:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

Even if they are all in `localhost`, they use different protocols or ports, so, they are different "origins".

## Steps { #steps }

## 源 { #origin }

源是协议（`http`，`https`）、域（`myapp.com`，`localhost`，`localhost.tiangolo.com`）以及端口（`80`、`443`、`8080`）的组合。

因此，这些都是不同的源：

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

即使它们都在 `localhost` 中，但是它们使用不同的协议或者端口，所以它们都是不同的「源」。

## 步骤 { #steps }

假设你的浏览器中有一个前端运行在 `http://localhost:8080`，并且它的 JavaScript 正在尝试与运行在 `http://localhost` 的后端通信（因为我们没有指定端口，浏览器会采用默认的端口 `80`）。