package net.emaze.dysfunctional.strings.lexcasts;
import net.emaze.dysfunctional.dispatching.delegates.Delegate;
import net.emaze.dysfunctional.options.Maybe;
import org.junit.Assert;
import org.junit.Test;
/**
*
* @author rferranti
*/
public class DoubleTryParserTest {
@Test(expected = ClassCastException.class)
public void passingNonStringToErasureYieldsException() {
Delegate d = new DoubleTryParser();
d.perform(new Object());
}
@Test
public void parsingNullStringYieldsNothing() {
final Maybe<Double> got = new DoubleTryParser().perform(null);
Assert.assertFalse(got.hasValue());
}
@Test
public void parsingInvalidStringYieldsNothing() {
final Maybe<Double> got = new DoubleTryParser().perform("A");
Assert.assertFalse(got.hasValue());
}
@Test
public void parsingValidStringYieldsJustValue() {
final Maybe<Double> got = new DoubleTryParser().perform("1.");
Assert.assertEquals(Maybe.just(1d), got);
}
}