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C.2. Sample Pax-Exam Test Class

Sample test class

Example C.2, “CalculatorITestClass” shows an example of how to write a test class for Apache Karaf in the Pax-Exam testing framework. The CalculatorITest class configures the Apache Karaf environment, installs the obr and wrapper features, and then runs a test against the two features (where the obr and wrapper features implement particular sets of commands in the command console).

Example C.2. CalculatorITestClass

// Java
/*
 * Licensed to the Apache Software Foundation (ASF)
 * ...
 */
package org.ops4j.pax.exam.sample.karaf;

import static org.ops4j.pax.exam.CoreOptions.maven;
import static org.ops4j.pax.exam.CoreOptions.mavenBundle;
import static org.ops4j.pax.exam.karaf.options.KarafDistributionOption.configureConsole;
import static org.ops4j.pax.exam.karaf.options.KarafDistributionOption.features;
import static org.ops4j.pax.exam.karaf.options.KarafDistributionOption.karafDistributionConfiguration;
import static org.ops4j.pax.exam.karaf.options.KarafDistributionOption.keepRuntimeFolder;

import java.io.File;

import javax.inject.Inject;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.Configuration;
import org.ops4j.pax.exam.ConfigurationManager;
import org.ops4j.pax.exam.Option;
import org.ops4j.pax.exam.junit.PaxExam;
import org.ops4j.pax.exam.options.MavenArtifactUrlReference;
import org.ops4j.pax.exam.options.MavenUrlReference;
import org.ops4j.pax.exam.sample8.ds.Calculator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


@RunWith(PaxExam.class)  1
public class CalculatorITest {
    private static Logger LOG = LoggerFactory.getLogger(CalculatorITest.class);


    @Inject 2
    protected Calculator calculator;


   @Configuration 3
    public Option[] config() {
        MavenArtifactUrlReference karafUrl = maven()
            .groupId("org.apache.karaf")
            .artifactId("apache-karaf")
            .version(karafVersion())
            .type("zip");
        MavenUrlReference karafStandardRepo = maven()
            .groupId("org.apache.karaf.features")
            .artifactId("standard")
            .version(karafVersion())
            .classifier("features")
            .type("xml");
        return new Option[] {
            // KarafDistributionOption.debugConfiguration("5005", true),
            karafDistributionConfiguration()
                .frameworkUrl(karafUrl)
                .unpackDirectory(new File("target", "exam"))
                .useDeployFolder(false),
            keepRuntimeFolder(),
            configureConsole().ignoreLocalConsole(),
            features(karafStandardRepo , "scr"),
            mavenBundle()
                .groupId("org.ops4j.pax.exam.samples")
                .artifactId("pax-exam-sample8-ds")
                .versionAsInProject().start(),
       };
    }

    public static String karafVersion() {
        ConfigurationManager cm = new ConfigurationManager();
        String karafVersion = cm.getProperty("pax.exam.karaf.version", "3.0.0");
        return karafVersion;
    }

    @Test 4
    public void testAdd() {
        int result = calculator.add(1, 2);
        LOG.info("Result of add was {}", result);
        Assert.assertEquals(3, result);
    }
}
1
The @RunWith annotation instructs JUnit4 to run the following test with the PaxExam class. This is the key step for integrating JUnit4 with the Pax-Exam testing framework.
2
The @Inject annotation is a javax annotation that identifies the following method as a service to be injected and executed in the testing framework.
3
The @Configuration annotation is specific to Pax-Exam and marks the following method as a configuration method for setting Pax-Exam testing options. The configuration method must be declared as public static and must have a return value of type, org.ops4j.pax.exam.Option[].
4
The @Test annotation is a standard JUnit4 annotation that identifies the following method as a test method to be executed in the testing framework.
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