DockerfileContainerTest.java

package org.testcontainers.junit;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.junit.Rule;
import org.junit.Test;
import org.testcontainers.containers.GenericContainer;
import org.testcontainers.images.builder.ImageFromDockerfile;

import java.io.IOException;

import static org.rnorth.visibleassertions.VisibleAssertions.assertEquals;
import static org.rnorth.visibleassertions.VisibleAssertions.assertTrue;

/**
 * Simple test case / demonstration of creating a fresh container image from a Dockerfile DSL
 */
public class DockerfileContainerTest {

    @Rule
    public GenericContainer dslContainer = new GenericContainer(
            new ImageFromDockerfile("tcdockerfile/nginx", false).withDockerfileFromBuilder(builder -> {
                    builder
                            .from("alpine:3.2")
                            .run("apk add --update nginx")
                            .cmd("nginx", "-g", "daemon off;")
                            .build(); }))
            .withExposedPorts(80);

    @Test
    public void simpleDslTest() throws IOException {
        String address = String.format("http://%s:%s", dslContainer.getContainerIpAddress(), dslContainer.getMappedPort(80));

        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        HttpGet get = new HttpGet(address);

        try (CloseableHttpResponse response = httpClient.execute(get)) {
            assertEquals("A container built from a dockerfile can run nginx as expected, and returns a good status code",
                            200,
                            response.getStatusLine().getStatusCode());
            assertTrue("A container built from a dockerfile can run nginx as expected, and returns an expected Server header",
                            response.getHeaders("Server")[0].getValue().contains("nginx"));
        }
    }
}