Add call graph logging to test (#124)

Minor logging enhancement.

Author: khatchad

com.ibm.wala.cast.python.ml.test/source/com/ibm/wala/cast/python/ml/test/TestTensorflowModel.java

@@ -4,6 +4,7 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
+import com.ibm.wala.cast.ipa.callgraph.CAstCallGraphUtil;
 import com.ibm.wala.cast.python.client.PythonAnalysisEngine;
 import com.ibm.wala.cast.python.ipa.callgraph.PythonSSAPropagationCallGraphBuilder;
 import com.ibm.wala.cast.python.ml.analysis.TensorTypeAnalysis;
@@ -13,6 +14,7 @@
 import com.ibm.wala.ipa.callgraph.CallGraph;
 import com.ibm.wala.ipa.callgraph.propagation.LocalPointerKey;
 import com.ibm.wala.ipa.callgraph.propagation.PointerKey;
+import com.ibm.wala.ipa.callgraph.propagation.SSAPropagationCallGraphBuilder;
 import com.ibm.wala.ipa.cha.ClassHierarchyException;
 import com.ibm.wala.util.CancelException;
 import java.io.IOException;
@@ -24,6 +26,7 @@
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
 import org.junit.Test;
@@ -226,10 +229,14 @@ private void testTf2(
     CallGraph CG = builder.makeCallGraph(builder.getOptions());
     assertNotNull(CG);
 
-    // CAstCallGraphUtil.AVOID_DUMP = false;
-    // CAstCallGraphUtil.dumpCG(((SSAPropagationCallGraphBuilder)builder).getCFAContextInterpreter(),
-    // builder.getPointerAnalysis(), CG);
-    // System.err.println(CG);
+    if (logger.isLoggable(Level.FINE)) {
+      CAstCallGraphUtil.AVOID_DUMP = false;
+      CAstCallGraphUtil.dumpCG(
+          ((SSAPropagationCallGraphBuilder) builder).getCFAContextInterpreter(),
+          builder.getPointerAnalysis(),
+          CG);
+      logger.fine("Call graph:\n" + CG);
+    }
 
     TensorTypeAnalysis analysis = E.performAnalysis(builder);