Hamcrest: everyItem: All elements must match to given matcher

By using ‘everyItem’ method, we can create a matcher that checks whether all the elements are matched to given matcher or not.

Ex

a. Employee age must be > 20

List<Integer> employeeAges = Arrays.asList(24, 45, 32);

assertThat("Age must be > 20", employeeAges, everyItem(greaterThan(20)));

b. All the strings must start with word ‘me’.

List<String> strs = Arrays.asList("men", "met", "melt");

assertThat("elements shoudl start with me", strs, everyItem(startsWith("me")));

Find the below working application.

TestApp.java

package com.sample.tests;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.everyItem;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.startsWith;

import java.util.Arrays;
import java.util.List;

import org.junit.Test;

public class TestApp {

 @Test
 public void testmethod() {
  List<Integer> employeeAges = Arrays.asList(24, 45, 32);
  assertThat("Age must be > 20", employeeAges, everyItem(greaterThan(20)));

  List<String> strs = Arrays.asList("men", "met", "melt");
  assertThat("elements shoudl start with me", strs, everyItem(startsWith("me")));
 }
}

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