extract test of unit

src/test/java/inferWildcards/TestInferWildcards.java

@@ -49,6 +49,12 @@ public class TestInferWildcards
 		for (CompilationUnitTree t : iterable) {
 			System.out.println("unit: " + t.toString());
 
+			testUnit(t);
+		}
+	}
+
+	@SuppressWarnings("rawtypes")
+	private void testUnit (CompilationUnitTree t) {
 		InferWildcardsVisitor inferWildcardsVisitor = new InferWildcardsVisitor();
 		t.accept(inferWildcardsVisitor, null);
 
@@ -59,7 +65,5 @@ public class TestInferWildcards
 		// Generated TPH
 		Map<TypePlaceholder, Tree> placeholderMapping = inferWildcardsVisitor.getPlaceholderMapping();
 		System.out.println("Placeholder: " + placeholderMapping.toString());
-
-		}
 	}
 }