import static org.fest.assertions.api.Assertions.*;
String actual = "Hello World";
String expected = "Hello World";
assertThat(actual).isEqualTo(expected);
import static org.fest.assertions.api.Assertions.*;
User actual = new User("John", 25);
User expected = new User("John", 25);
assertThat(actual).isEqualTo(expected);
import static org.fest.assertions.api.Assertions.*;
List<String> actualList = Arrays.asList("apple", "banana", "orange");
List<String> expectedList = Arrays.asList("apple", "banana", "orange");
assertThat(actualList).containsExactly(expectedList.toArray());
import static org.fest.assertions.api.Assertions.*;
assertThatThrownBy(() -> {
throw new IllegalArgumentException("Invalid argument");
}).isInstanceOf(IllegalArgumentException.class)
.hasMessageContaining("Invalid argument");
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>3.21.0</version>
<scope>test</scope>
</dependency>
groovy
testImplementation 'org.assertj:assertj-core:3.21.0'
