import org.hamcrest.MatcherAssert;
import org.hamcrest.Matchers;
import org.junit.Test;
import java.util.Arrays;
import java.util.List;
public class HamcrestExampleTest {
@Test
public void testStringMatchers() {
String str = "Hello, world!";
MatcherAssert.assertThat(str, Matchers.equalTo("Hello, world!"));
MatcherAssert.assertThat(str, Matchers.startsWith("Hello"));
MatcherAssert.assertThat(str, Matchers.endsWith("!"));
MatcherAssert.assertThat(str, Matchers.containsString(","));
MatcherAssert.assertThat(str, Matchers.matchesRegex("^[A-Za-z, !]+$"));
}
@Test
public void testCollectionMatchers() {
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
MatcherAssert.assertThat(numbers, Matchers.hasSize(5));
MatcherAssert.assertThat(numbers, Matchers.contains(1, 2, 3, 4, 5));
MatcherAssert.assertThat(numbers, Matchers.everyItem(Matchers.greaterThan(0)));
}
@Test
public void testNumberMatchers() {
int number = 10;
double decimal = 3.14;
MatcherAssert.assertThat(number, Matchers.greaterThan(5));
MatcherAssert.assertThat(decimal, Matchers.closeTo(3, 0.1));
}
}
