openide/java/java-tests/testData/inspection/dataFlow/fixture/Instanceof.java

import java.util.List;

class Test {
  void testTypePattern1(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof String s' is always 'true'">o instanceof String s</warning>) {
      System.out.println();
    }
  }

  void testPattern2(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof Integer i' is always 'false'">o instanceof Integer i</warning>) {
      System.out.println();
    }
  }

  void testGuardedPattern1(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof String s && s.length() <= 3 && (s.length() > 1 || s.length() > 10)' is always 'true'"><warning descr="Condition 'o instanceof String s' is always 'true'">o instanceof String s</warning> && <warning descr="Condition 's.length() <= 3' is always 'true'">s.length() <= 3</warning> && (<warning descr="Condition 's.length() > 1 || s.length() > 10' is always 'true'"><warning descr="Condition 's.length() > 1' is always 'true'">s.length() > 1</warning> || s.length() > 10</warning>)</warning>) {
      System.out.println();
    }
  }

  void testGuardedPattern2(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof String s && s.length() < 3' is always 'false'"><warning descr="Condition 'o instanceof String s' is always 'true'">o instanceof String s</warning> && <warning descr="Condition 's.length() < 3' is always 'false' when reached">s.length() < 3</warning></warning>) {
      System.out.println();
    }
  }

  void testParenthesizedPattern1(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof String s' is always 'true'">o instanceof String s</warning>) {
      System.out.println();
    }
  }

  void testParenthesizedPattern2(Object o) {
    o = "fsd";
    if (<warning descr="Condition 'o instanceof Integer i' is always 'false'">o instanceof Integer i</warning>) {
      System.out.println();
    }
  }

  void testInstanceofInForeach(List<Object> list) {
    for (Object obj : list) {
      if (obj instanceof String st) {
      }
    }
  }

  void testInstanceofTotalInForeach(List<Object> list) {
    for (Object obj : list) {
      if (<warning descr="Condition 'obj instanceof Object st' is redundant and can be replaced with a null check">obj instanceof Object st</warning>) {
      }
    }
  }

  private String getString() {
    return "str";
  }
}