IMDS + Wiremock

ImdsUtilsIntegrationTests.java

package io.awspring.cloud.autoconfigure.imds;

import java.net.URI;

import com.github.tomakehurst.wiremock.WireMockServer;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import software.amazon.awssdk.imds.Ec2MetadataClient;

import static com.github.tomakehurst.wiremock.client.ResponseDefinitionBuilder.responseDefinition;
import static com.github.tomakehurst.wiremock.client.WireMock.get;
import static com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor;
import static com.github.tomakehurst.wiremock.client.WireMock.put;
import static com.github.tomakehurst.wiremock.client.WireMock.putRequestedFor;
import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
import static org.assertj.core.api.Assertions.assertThat;

class ImdsUtilsIntegrationTests {

	private WireMockServer wireMockServer = new WireMockServer(options().dynamicPort());
	private ImdsUtils imdsUtils;

	@BeforeEach
	void init() {
		wireMockServer.start();
		imdsUtils = new ImdsUtils(Ec2MetadataClient.builder()
			.endpoint(URI.create(wireMockServer.baseUrl()))
			.build());
	}

	@AfterEach
	void stop() {
		wireMockServer.stop();
	}

	@Test
	void foo() {
		// stub metadata responses with as most realistic data as possible:
		wireMockServer.stubFor(put(urlEqualTo("/latest/api/token")).willReturn(
                responseDefinition().withHeader("x-aws-ec2-metadata-token-ttl-seconds", "100").withBody("a-token")));
		wireMockServer.stubFor(get(urlEqualTo("/latest/meta-data/ami-id")).willReturn(
                responseDefinition().withBody("sample-ami-id")));

		assertThat(imdsUtils.isRunningOnCloudEnvironment()).isTrue();

		// optionally, where makes sense you can also verify if correct requests were sent:
		wireMockServer.verify(putRequestedFor(urlEqualTo("/latest/api/token")));
		wireMockServer.verify(getRequestedFor(urlEqualTo("/latest/meta-data/ami-id")));
	}

}

In spring-cloud-aws-autoconfigure/pom.xml:

<dependency>
	<groupId>org.wiremock</groupId>
	<artifactId>wiremock-standalone</artifactId>
	<version>3.3.1</version>
	<scope>test</scope>
</dependency>