如何在JUnit5中测试WireMockServer？

问题描述

我正在尝试编写一个微型库来进行测试，以模拟常见的外部服务，例如电子邮件，SFTP，存储桶，HTTP API。

此刻，我陷入了wiremockServer的困境。在WireMock docs中，我可以创建服务器和客户端来验证API调用。

我写了课：

public class wiremockTestServer {

    private final wiremockServer server;

    public wiremockTestServer(String address,MappingBuilder mappingBuilder) {
        server = new wiremockServer(wiremockConfig().dynamicPort().dynamicHttpsPort());
    }

    public wiremockTestServer(int httpPort,int httpsPort,String address,MappingBuilder mappingBuilder) {
        server = setup(
                new wiremockServer(wiremockConfig().port(httpPort).httpsPort(httpsPort).bindAddress(address)),mappingBuilder
        );
    }

    private wiremockServer setup(wiremockServer server,MappingBuilder mappingBuilder) {
        server.stubFor(mappingBuilder);
        return server;
    }

    public void start() {
        server.start();
    }

    public void stop() {
        server.stop();
    }
}

我可以使用它声明端点声明并将我的服务重定向到它。

当我尝试测试时：

public class wiremockTestServerTest {

    @Test
    public void testSetup() throws Exception {
        MappingBuilder mappingBuilder = get(urlEqualTo("/health"))
                .willReturn(aResponse().withHeader("Content-Type","application/json")
                        .withStatus(200));
        wiremockTestServer server = new wiremockTestServer(8888,9988,"127.0.0.1",mappingBuilder);
        server.start();


        // This line should fail
        verify(getRequestedFor(urlEqualTo("/health")).withHeader("Content-Type",equalTo("text/xml")));
        server.stop();
    }

}

测试失败。问题是，它之所以失败，不是因为有断言，而是因为它在错误的端口8080上启动，该端口被其他进程占用。

如何在另一个端口上启动wiremockServer并用JUnit 5进行测试？

我正在使用Java 8，Maven，Spring Boot。

解决方法

如注释静态verify方法所述，该方法尝试根据默认的Wiremock实例进行验证。由于您是在测试中创建独立实例，因此您应该对其进行验证。在您的verify中创建一个WireMockTestServer方法：

public void verify(final RequestPatternBuilder requestPatternBuilder) {
    server.verify(requestPatternBuilder);
}

，然后您可以对其进行验证：

@Test
public void testSetup() throws Exception {
    MappingBuilder mappingBuilder = get(urlEqualTo("/health"))
            .willReturn(aResponse().withHeader("Content-Type","application/json")
                    .withStatus(200));
    WireMockTestServer server = new WireMockTestServer(8888,9988,"127.0.0.1",mappingBuilder);
    server.start();

    // This line should fail
    server.verify(getRequestedFor(urlEqualTo("/health")).withHeader("Content-Type",equalTo("text/xml")));
    server.stop();
}