我正在使用带有netflix堆栈和spring boot的微服务构建应用程序。让我烦恼的一件事是，我还没有集成测试，在那里我可以模拟周围的服务。
因此，我有服务A，它是一个带有功能区的eureka客户端，用于在调用期间将eureka名称解析为已注册服务B的URL。
因此，理想情况下，我想使用 Spring boot 的集成测试注释启动应用程序，使用 wiremock 模拟服务 B，然后调用服务 A 的方法，这应该使用服务的符号名称调用我的模拟服务 B。
有人已经解决了这个问题吗？我已经搜索了已经这样做的人的博客文章等，但找不到任何...
我知道SO文章Mock an Eureka假装客户端进行单元测试，但据我所知，这只是防止发现客户端抱怨。
以下代码（取自 https://github.com/Netflix/eureka/blob/a7a8d278e6399bbff5faa49b9fcbcd7ea9e854f4/eureka-core/src/test/java/com/netflix/eureka/mock/MockRemoteEurekaServer.java）可能对您有所帮助;
public class MockRemoteEurekaServer extends ExternalResource {
public static final String EUREKA_API_BASE_PATH = "/eureka/v2/";
private final Map<String, Application> applicationMap;
private final Map<String, Application> applicationDeltaMap;
private final Server server;
private boolean sentDelta;
private int port;
private volatile boolean simulateNotReady;
public MockRemoteEurekaServer(int port, Map<String, Application> applicationMap,
Map<String, Application> applicationDeltaMap) {
this.applicationMap = applicationMap;
this.applicationDeltaMap = applicationDeltaMap;
ServletHandler handler = new AppsResourceHandler();
EurekaServerConfig serverConfig = new DefaultEurekaServerConfig();
EurekaServerContext serverContext = mock(EurekaServerContext.class);
when(serverContext.getServerConfig()).thenReturn(serverConfig);
handler.addFilterWithMapping(ServerRequestAuthFilter.class, "/*", 1).setFilter(new ServerRequestAuthFilter(serverContext));
handler.addFilterWithMapping(RateLimitingFilter.class, "/*", 1).setFilter(new RateLimitingFilter(serverContext));
server = new Server(port);
server.addHandler(handler);
System.out.println(String.format(
"Created eureka server mock with applications map %s and applications delta map %s",
stringifyAppMap(applicationMap), stringifyAppMap(applicationDeltaMap)));
}
@Override
protected void before() throws Throwable {
start();
}
@Override
protected void after() {
try {
stop();
} catch (Exception e) {
Assert.fail(e.getMessage());
}
}
public void start() throws Exception {
server.start();
port = server.getConnectors()[0].getLocalPort();
}
public void stop() throws Exception {
server.stop();
}
public boolean isSentDelta() {
return sentDelta;
}
public int getPort() {
return port;
}
public void simulateNotReady(boolean simulateNotReady) {
this.simulateNotReady = simulateNotReady;
}
private static String stringifyAppMap(Map<String, Application> applicationMap) {
StringBuilder builder = new StringBuilder();
for (Map.Entry<String, Application> entry : applicationMap.entrySet()) {
String entryAsString = String.format("{ name : %s , instance count: %d }", entry.getKey(),
entry.getValue().getInstances().size());
builder.append(entryAsString);
}
return builder.toString();
}
private class AppsResourceHandler extends ServletHandler {
@Override
public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch)
throws IOException, ServletException {
if (simulateNotReady) {
response.setStatus(HttpServletResponse.SC_FORBIDDEN);
return;
}
String authName = request.getHeader(AbstractEurekaIdentity.AUTH_NAME_HEADER_KEY);
String authVersion = request.getHeader(AbstractEurekaIdentity.AUTH_VERSION_HEADER_KEY);
String authId = request.getHeader(AbstractEurekaIdentity.AUTH_ID_HEADER_KEY);
Assert.assertNotNull(authName);
Assert.assertNotNull(authVersion);
Assert.assertNotNull(authId);
Assert.assertTrue(!authName.equals(ServerRequestAuthFilter.UNKNOWN));
Assert.assertTrue(!authVersion.equals(ServerRequestAuthFilter.UNKNOWN));
Assert.assertTrue(!authId.equals(ServerRequestAuthFilter.UNKNOWN));
for (FilterHolder filterHolder : this.getFilters()) {
filterHolder.getFilter().doFilter(request, response, new FilterChain() {
@Override
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
// do nothing;
}
});
}
String pathInfo = request.getPathInfo();
System.out.println(
"Eureka resource mock, received request on path: " + pathInfo + ". HTTP method: |" + request
.getMethod() + '|');
boolean handled = false;
if (null != pathInfo && pathInfo.startsWith("")) {
pathInfo = pathInfo.substring(EUREKA_API_BASE_PATH.length());
if (pathInfo.startsWith("apps/delta")) {
Applications apps = new Applications();
for (Application application : applicationDeltaMap.values()) {
apps.addApplication(application);
}
apps.setAppsHashCode(apps.getReconcileHashCode());
sendOkResponseWithContent((Request) request, response, toJson(apps));
handled = true;
sentDelta = true;
} else if (pathInfo.startsWith("apps")) {
Applications apps = new Applications();
for (Application application : applicationMap.values()) {
apps.addApplication(application);
}
apps.setAppsHashCode(apps.getReconcileHashCode());
sendOkResponseWithContent((Request) request, response, toJson(apps));
handled = true;
}
}
if (!handled) {
response.sendError(HttpServletResponse.SC_NOT_FOUND,
"Request path: " + pathInfo + " not supported by eureka resource mock.");
}
}
private void sendOkResponseWithContent(Request request, HttpServletResponse response, String content)
throws IOException {
response.setContentType("application/json; charset=UTF-8");
response.setStatus(HttpServletResponse.SC_OK);
response.getOutputStream().write(content.getBytes("UTF-8"));
response.getOutputStream().flush();
request.setHandled(true);
System.out.println("Eureka resource mock, sent response for request path: " + request.getPathInfo() +
" with content" + content);
}
}
private String toJson(Applications apps) throws IOException {
return new EurekaJsonJacksonCodec().getObjectMapper(Applications.class).writeValueAsString(apps);
}
}
一种选择是使用Camel来模拟/替换Eureka端点。应该有配置告诉你的应用在何处查找 Eureka，因此请在测试配置中覆盖该配置以指向新的终结点。
然后在 test/src 中创建一个 Camel 路由，使用 jetty 或 http 来表示这个新终结点，这将返回 LoadBalancerClient 期望的响应。该响应将测试 URI（即您的应用程序）。
