How do I assert equality on two classes without an equals method?

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There is many correct answers here, but I would like to add my version too. This is based on Assertj.

import static org.assertj.core.api.Assertions.assertThat;

public class TestClass {

    public void test() {
        // do the actual test
        assertThat(actualObject)
            .isEqualToComparingFieldByFieldRecursively(expectedObject);
    }
}

UPDATE: In assertj v3.13.2 this method is deprecated as pointed out by Woodz in comment. Current recommendation is

public class TestClass {

    public void test() {
        // do the actual test
        assertThat(actualObject)
            .usingRecursiveComparison()
            .isEqualTo(expectedObject);
    }

}

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