added test class for community removal from the set to be dumped

dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/dump/community/RemoveCommunityTest.java

@@ -1,4 +1,60 @@
+
 package eu.dnetlib.dhp.oa.graph.dump.community;
 
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.LocalFileSystem;
+import org.apache.hadoop.fs.Path;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import eu.dnetlib.dhp.oa.graph.dump.MakeTar;
+import eu.dnetlib.dhp.oa.graph.dump.MakeTarTest;
+
 public class RemoveCommunityTest {
+
+	private static String workingDir;
+
+	@BeforeAll
+	public static void beforeAll() throws IOException {
+		workingDir = Files
+			.createTempDirectory(MakeTarTest.class.getSimpleName())
+			.toString();
+	}
+
+	@Test
+	public void testRemove() throws Exception {
+		LocalFileSystem fs = FileSystem.getLocal(new Configuration());
+
+		fs
+			.copyFromLocalFile(
+				false, new Path(getClass()
+					.getResource("/eu/dnetlib/dhp/oa/graph/dump/communityMapPath/communitymap.json")
+					.getPath()),
+				new Path(workingDir + "/communityMap"));
+
+		String path = workingDir + "/communityMap";
+
+		RemoveCommunities.main(new String[] {
+			"-nameNode", "local",
+			"-path", path,
+			"-communityId", "beopen"
+		}
+
+		);
+
+		CommunityMap cm = new ObjectMapper()
+			.readValue(new FileInputStream(workingDir + "/communityMap"), CommunityMap.class);
+
+		Assertions.assertEquals(1, cm.size());
+		Assertions.assertTrue(cm.containsKey("beopen"));
+
+	}
 }