server/protocols/jmap-draft-integration-testing/jmap-draft-integration-testing-common/src/test/java/org/apache/james/jmap/MockSmtpTestRule.java

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package org.apache.james.jmap;

import java.util.UUID;

import org.apache.james.mock.smtp.server.ConfigurationClient;
import org.apache.james.util.Host;
import org.apache.james.util.docker.DockerContainer;
import org.apache.james.util.docker.Images;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testcontainers.containers.wait.strategy.Wait;

public class MockSmtpTestRule implements TestRule {
    public static class DockerMockSmtp {
        private static final Logger LOGGER = LoggerFactory.getLogger(DockerMockSmtp.class);

        private final DockerContainer mockSmtpServer;

        DockerMockSmtp() {
            mockSmtpServer = DockerContainer.fromName(Images.MOCK_SMTP_SERVER)
                .withLogConsumer(outputFrame -> LOGGER.debug("MockSMTP: " + outputFrame.getUtf8String()))
                .withExposedPorts(25, 8000)
                .waitingFor(Wait.forLogMessage(".*Mock SMTP server started.*", 1))
                .withName("james-testing-mock-smtp-server-" + UUID.randomUUID());
        }

        public ConfigurationClient getConfigurationClient() {
            return ConfigurationClient.from(Host.from(
                mockSmtpServer.getHostIp(),
                mockSmtpServer.getMappedPort(8000)));
        }

        public String getIPAddress() {
            return mockSmtpServer.getContainerIp();
        }
    }

    private final DockerMockSmtp dockerMockSmtp;

    public MockSmtpTestRule() {
        this.dockerMockSmtp = new DockerMockSmtp();
    }

    @Override
    public Statement apply(Statement statement, Description description) {
        return dockerMockSmtp.mockSmtpServer.apply(statement, description);
    }

    public DockerMockSmtp getDockerMockSmtp() {
        return dockerMockSmtp;
    }
}