infer_clone/infer/tests/endtoend/objc/BlockDispatchTest.java

/*
 * Copyright (c) 2015 - 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.
 */

package endtoend.objc;

import static org.hamcrest.MatcherAssert.assertThat;
import static utils.matchers.ResultContainsErrorInMethod.contains;
import static utils.matchers.ResultContainsExactly.containsExactly;

import com.google.common.collect.ImmutableList;

import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;

import java.io.IOException;

import utils.DebuggableTemporaryFolder;
import utils.InferException;
import utils.InferResults;
import utils.InferRunner;

public class BlockDispatchTest {

  public static final String FILE = "infer/tests/codetoanalyze/objc/frontend/block/dispatch.m";

  private static ImmutableList<String> inferCmd;

  public static final String DIVIDE_BY_ZERO = "DIVIDE_BY_ZERO";

  @ClassRule
  public static DebuggableTemporaryFolder folder =
      new DebuggableTemporaryFolder();

  @BeforeClass
  public static void runInfer() throws InterruptedException, IOException {
    inferCmd = InferRunner.createiOSInferCommandWithMLBuckets(folder, FILE, "cf", false);
  }

  @Test
  public void whenInferRunsOnMThenNPEIsFound()
      throws InterruptedException, IOException, InferException {
    InferResults inferResults = InferRunner.runInferC(inferCmd);
    String[] procedures = {
        "A_dispatch_a_block_variable_from_macro_delivers_initialised_object"
    };
    assertThat(
        "Results should contain the expected " + DIVIDE_BY_ZERO,
        inferResults,
        containsExactly(
            DIVIDE_BY_ZERO, //No NPEs are found. If the call to dispatch_once didn't work
                              // we would get an NPE. We find only one divide by zero.
            FILE,
            procedures
        )
    );
  }
}