Hamcrest: isIn: Check the object existence in the collection

By using 'isIn' method, we can create a matcher that matches when the examined object is found within the specified collection.

Ex

List<String> names = new ArrayList<>();

names.add("gopi");

names.add("hari");

names.add("krishna");

assertThat("'krishna' must be part of the list", "krishna", isIn(names));

Find the below working application.

TestApp.java

package com.sample.tests;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.isIn;

import java.util.ArrayList;
import java.util.List;

import org.junit.Test;

public class TestApp {

 @Test
 public void testmethod() {
  List<String> names = new ArrayList<>();
  names.add("gopi");
  names.add("hari");
  names.add("krishna");

  assertThat("'krishna' must be part of the list", "krishna", isIn(names));

 }
}

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