Merge pull request #121 from rombert/feature/pax-exam-tests

Add OSGiSmokeTest using pax-exam

pom.xml

@@ -27,6 +27,7 @@
         <jdk.home>${java.home}</jdk.home>
         <!-- current year. -->
         <year>2018</year>
+        <pax-exam.version>4.11.0</pax-exam.version>
     </properties>
     <licenses>
         <license>
@@ -68,6 +69,37 @@
             <version>3.6</version>
             <scope>test</scope>
         </dependency>
+        <!--  Test dependencies for OSGi setup --> 
+        <dependency>
+            <groupId>org.ops4j.pax.exam</groupId>
+            <artifactId>pax-exam-container-native</artifactId>
+            <version>${pax-exam.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.ops4j.pax.exam</groupId>
+            <artifactId>pax-exam-junit4</artifactId>
+            <version>${pax-exam.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.ops4j.pax.exam</groupId>
+            <artifactId>pax-exam-link-mvn</artifactId>
+            <version>${pax-exam.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.2.3</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.felix</groupId>
+            <artifactId>org.apache.felix.framework</artifactId>
+            <version>6.0.1</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
     <build>
         <resources>

src/test/java/org/rrd4j/osgi/OSGiSmokeTest.java

@@ -0,0 +1,76 @@
+package org.rrd4j.osgi;
+
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.startsWith;
+import static org.junit.Assume.assumeThat;
+import static org.ops4j.pax.exam.CoreOptions.bundle;
+import static org.ops4j.pax.exam.CoreOptions.junitBundles;
+import static org.ops4j.pax.exam.CoreOptions.options;
+import static org.rrd4j.ConsolFun.AVERAGE;
+import static org.rrd4j.ConsolFun.MAX;
+
+import java.io.IOException;
+import java.util.Random;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.ops4j.pax.exam.Configuration;
+import org.ops4j.pax.exam.Option;
+import org.ops4j.pax.exam.junit.PaxExam;
+import org.rrd4j.DsType;
+import org.rrd4j.core.RrdBackendFactory;
+import org.rrd4j.core.RrdDb;
+import org.rrd4j.core.RrdDef;
+import org.rrd4j.core.Sample;
+
+/**
+ * This test validates that the rrd4j bundle resolves in a minimal OSGi container
+ * 
+ * <p>The bundle is picked up from the <tt>target/classes</tt> folder, so the classes <i>and</i>
+ * the MANIFEST.MF file should be present there. This is usually the case when using Eclipse with
+ * m2e, but in some scenarios there might be a need to run <tt>mvn compile</tt>.</p>
+ * 
+ * <p>This is intentionally not a full-fledged test of rrd4j, it just ensures that the bundle
+ * works in an OSGi container.</p>
+ *
+ */
+@RunWith(PaxExam.class)
+public class OSGiSmokeTest {
+
+    @Rule
+    public TemporaryFolder temp = new TemporaryFolder();
+
+    @Configuration
+    public Option[] config() {
+        return options(bundle("reference:file:target/classes"), junitBundles());
+    }
+
+    @Test
+    public void basicUsage() throws IOException {
+
+        // OSGi metadata is only added for Java8+, so skip this test on Java 7
+        String javaVersion = System.getProperty("java.version");
+        assumeThat(javaVersion, not(startsWith((("1.7")))));
+
+        RrdDef rrdDef = new RrdDef(temp.newFile().getAbsolutePath(), 300);
+        rrdDef.addArchive(AVERAGE, 0.5, 1, 600); // 1 step, 600 rows
+        rrdDef.addArchive(AVERAGE, 0.5, 6, 700); // 6 steps, 700 rows
+        rrdDef.addDatasource("inbytes", DsType.GAUGE, 600, Double.NaN, Double.NaN);
+        rrdDef.addArchive(MAX, 0.5, 1, 600);
+
+        Random rnd = new Random();
+
+        // due to sun.misc usually not being exported, default to the FILE backend
+        try (RrdDb rrdDb = new RrdDb(rrdDef, RrdBackendFactory.getFactory("FILE"))) {
+            long time = System.currentTimeMillis() / 1000;
+            Sample sample = rrdDb.createSample();
+            for ( int i = 0 ; i < 10; i++ ) {
+                sample.setTime(time + i * 1000);
+                sample.setValue("inbytes", rnd.nextDouble());
+                sample.update();
+            }
+        }
+    }
+}

src/test/resources/logback-test.xml

@@ -0,0 +1,11 @@
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d [%t] %level %logger{36} - %msg%n</pattern>
+    </encoder>
+  </appender>
+
+  <root level="info">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>