Fixed test exclusions and added missing tests.

libraries-data-2/pom.xml

@@ -189,10 +189,13 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
-				<!-- Excludes FastR classes from compilations since they require GraalVM -->
+					<!-- Excludes FastR classes from compilations since they require GraalVM -->
 					<excludes>
 						<exclude>com/baeldung/r/FastRMean.java</exclude>
 					</excludes>
+					<testExcludes>
+						<exclude>com/baeldung/r/FastRMeanUnitTest.java</exclude>						
+					</testExcludes>
 				</configuration>
 			</plugin>
 		</plugins>

libraries-data-2/src/test/java/com/baeldung/r/RserveMeanIntegrationTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.r;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.rosuda.REngine.REXPMismatchException;
+import org.rosuda.REngine.REngineException;
+
+/**
+ * Test for {@link RserveMean}.
+ * 
+ * @author Donato Rimenti
+ */
+@Ignore
+public class RserveMeanIntegrationTest {
+
+	/**
+	 * Object to test.
+	 */
+	private RserveMean rserveMean = new RserveMean();
+
+	/**
+	 * Test for {@link RserveMeanIntegrationTest#mean(int[])}.
+	 * 
+	 * @throws REXPMismatchException if an error occurs
+	 * @throws REngineException      if an error occurs
+	 */
+	@Test
+	public void givenValues_whenMean_thenCorrect() throws REngineException, REXPMismatchException {
+		int[] input = { 1, 2, 3, 4, 5 };
+		double result = rserveMean.mean(input);
+		Assert.assertEquals(3.0, result, 0.000001);
+	}
+}