[infer][eradicate] Consider junit.framework.TestCase.setUp as an initializer

Summary: The method `junit.framework.TestCase.setUp()` is always run before the other methods by the JUnit testing framework. So the method act as a class initializer.

Reviewed By: sblackshear

Differential Revision: D4487371

fbshipit-source-id: 1998801

infer/src/checkers/patternMatch.ml

@@ -258,6 +258,7 @@ let initializer_classes =
       "android.app.Fragment";
       "android.app.Service";
       "android.support.v4.app.Fragment";
+      "junit.framework.TestCase";
     ]
 
 let initializer_methods = [
@@ -265,6 +266,7 @@ let initializer_methods = [
   "onAttach";
   "onCreate";
   "onCreateView";
+  "setUp";
 ]
 
 (** Check if the type has in its supertypes from the initializer_classes list. *)

infer/tests/codetoanalyze/java/eradicate/JunitExample.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2017 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+import junit.framework.TestCase;
+
+public class JunitExample extends TestCase {
+
+  private Object mField;
+
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+    mField = new Object();
+  }
+
+  public void testSomething() {
+    mField.toString();
+  }
+
+}

infer/tests/java.make

@@ -17,5 +17,6 @@ GUAVA = $(DEPENDENCIES_DIR)/java/guava/guava-10.0.1-fork.jar
 JACKSON = $(DEPENDENCIES_DIR)/java/jackson/jackson-2.2.3.jar
 JSR305 = $(DEPENDENCIES_DIR)/java/jsr-305/jsr305.jar
 INJECT = $(DEPENDENCIES_DIR)/java/jsr-330/javax.inject.jar
+JUNIT = $(DEPENDENCIES_DIR)/java/junit/junit-4.11.jar
 
-CLASSPATH=$(ANDROID):$(ANDROIDSUPPORT):$(ANNOTATIONS):$(BUTTERKNIFE):$(GUAVA):$(JACKSON):$(JSR305):$(INJECT):$(JAVA_BUILTINS_DIR):.
+CLASSPATH=$(ANDROID):$(ANDROIDSUPPORT):$(ANNOTATIONS):$(BUTTERKNIFE):$(GUAVA):$(JACKSON):$(JSR305):$(INJECT):$(JAVA_BUILTINS_DIR):$(JUNIT):.