[MINOR] Federated Planner Test

Add different configs for federated L2SVM and add test cases.
Closes apache#1563.

Author: sebwrede

src/main/java/org/apache/sysds/hops/cost/HopRel.java

@@ -196,9 +196,10 @@ public String toString(){
 		strB.append(", FedOut: ");
 		strB.append(fedOut);
 		strB.append(", Cost: ");
-		strB.append(cost);
-		strB.append(", Number of inputs: ");
-		strB.append(inputDependency.size());
+		strB.append(cost.getTotal());
+		strB.append(", Inputs: ");
+		strB.append(inputDependency.stream().map(i -> "{" + i.getHopRef().getHopID() +
+			", " + i.getFederatedOutput() + "}").collect(Collectors.toList()));
 		strB.append("}");
 		return strB.toString();
 	}

src/test/java/org/apache/sysds/test/functions/privacy/fedplanning/FederatedL2SVMPlanningTest.java

@@ -43,8 +43,7 @@ public class FederatedL2SVMPlanningTest extends AutomatedTestBase {
 	private final static String TEST_DIR = "functions/privacy/fedplanning/";
 	private final static String TEST_NAME = "FederatedL2SVMPlanningTest";
 	private final static String TEST_CLASS_DIR = TEST_DIR + FederatedL2SVMPlanningTest.class.getSimpleName() + "/";
-	private final static String TEST_CONF = "SystemDS-config-fout.xml";
-	private final static File   TEST_CONF_FILE = new File(SCRIPT_DIR + TEST_DIR, TEST_CONF);
+	private static File TEST_CONF_FILE;
 
 	private final static int blocksize = 1024;
 	public final int rows = 100;
@@ -57,12 +56,33 @@ public void setUp() {
 	}
 
 	@Test
-	public void runL2SVMTest(){
+	public void runL2SVMFOUTTest(){
 		String[] expectedHeavyHitters = new String[]{ "fed_fedinit", "fed_ba+*", "fed_tak+*", "fed_+*",
 			"fed_max", "fed_1-*", "fed_tsmm", "fed_>"};
+		setTestConf("SystemDS-config-fout.xml");
 		loadAndRunTest(expectedHeavyHitters);
 	}
 
+	@Test
+	public void runL2SVMHeuristicTest(){
+		String[] expectedHeavyHitters = new String[]{ "fed_fedinit", "fed_ba+*"};
+		setTestConf("SystemDS-config-heuristic.xml");
+		loadAndRunTest(expectedHeavyHitters);
+	}
+
+	@Test
+	public void runL2SVMCostBasedTest(){
+		//String[] expectedHeavyHitters = new String[]{ "fed_fedinit", "fed_ba+*", "fed_tak+*", "fed_+*",
+		//	"fed_max", "fed_1-*", "fed_tsmm", "fed_>"};
+		String[] expectedHeavyHitters = new String[]{ "fed_fedinit"};
+		setTestConf("SystemDS-config-cost-based.xml");
+		loadAndRunTest(expectedHeavyHitters);
+	}
+
+	private void setTestConf(String test_conf){
+		TEST_CONF_FILE = new File(SCRIPT_DIR + TEST_DIR, test_conf);
+	}
+
 	private void writeInputMatrices(){
 		writeStandardRowFedMatrix("X1", 65, null);
 		writeStandardRowFedMatrix("X2", 75, null);

src/test/scripts/functions/privacy/fedplanning/SystemDS-config-cost-based.xml

@@ -0,0 +1,23 @@
+<!--
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+-->
+
+<root>
+   <!-- set the federated plan generator (none, [runtime], compile_fed_all, compile_fed_heuristic, compile_cost_based) -->
+   <sysds.federated.planner>compile_cost_based</sysds.federated.planner>
+</root>

src/test/scripts/functions/privacy/fedplanning/SystemDS-config-heuristic.xml

@@ -0,0 +1,23 @@
+<!--
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+-->
+
+<root>
+   <!-- set the federated plan generator (none, [runtime], compile_fed_all, compile_fed_heuristic, compile_cost_based) -->
+   <sysds.federated.planner>compile_fed_heuristic</sysds.federated.planner>
+</root>