Assert that Optional has certain value

Question

I have a Java method that returns an Optional. I\'d like to write an easy-to-read unit test for it that asserts that

1. the returned Optional has a value (i.e.

Answer 1

I use Hamcrest Optional for that:

import static com.github.npathai.hamcrestopt.OptionalMatchers.hasValue;
import org.junit.Test;

public class MyUnitTests {

  @Test
  public void testThatOptionalHasValue(){
    String expectedValue = "actual value";
    assertThat(testedMethod(), hasValue(expectedValue));
  }
}

You can add Hamcrest Optional to your dependencies by including it in your build.gradle:

dependencies {
  testCompile 'junit:junit:4.12'
  testCompile 'com.github.npathai:hamcrest-optional:1.0'
}