infer_clone/infer/tests/codetoanalyze/java/immutability/ArrayTest.java

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
package codetoanalyze.java.immutability;

import com.moblica.common.xmob.utils.Immutable;

class ArrayTest {
  @Immutable final int[] testArray = new int[] {0, 1, 2, 4};
  @Immutable static String[] suitArray = {"spades", "hearts", "diamonds", "clubs"};
  int[] mutableArray = new int[] {0};

  void array_mod_bad() {
    testArray[3] = 3; // modifications to an immutable array are not ok
  }

  int[] get_testArray() {
    return testArray;
  }

  void mutate_array_via_getter_bad() {
    int[] array = get_testArray();
    array[2] = 7; // ERROR!
  }

  void mutate_array_via_aliasing_bad() {
    int[] array = get_testArray();
    int[] otherArray = array;
    otherArray[2] = 7; // ERROR!
  }

  void mutate_array_via_callee_bad() {
    int[] array = get_testArray();
    int[] otherArray = array;
    mutate_param_ok(array); // ERROR!
  }

  void mutate_param_ok(int[] array) {
    array[2] = 7;
  }

  void mutate_static_array_bad() {
    suitArray[0] = "pades"; // ERROR!
  }

  void mutable_array_mod_ok() {
    mutableArray[0] = 3; // modifications to mutable arrays are ok
  }

  void mixed_mod_bad() {
    mutableArray[0] = 3; // modifications to mutable arrays are ok
    mutate_array_via_callee_bad(); // // modifications to immutables are not
  }
}