DoubleStreamSerializerTest.java

package tools.jackson.databind.ext.jdk8;

import java.util.stream.DoubleStream;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;

public class DoubleStreamSerializerTest extends StreamTestBase
{
    final double[] empty = {};

    final double[] single = { 1L };

    final double[] multipleValues = { Double.MIN_VALUE, Double.MAX_VALUE, 1.0, 0.0, 6.0, -3.0 };

    final String exceptionMessage = "DoubleStream peek threw";

    @Test
    public void testEmptyStream() throws Exception {

        assertArrayEquals(empty, roundTrip(DoubleStream.empty()), 0.0);
    }

    @Test
    public void testSingleElement() throws Exception {

        assertArrayEquals(single, roundTrip(DoubleStream.of(single)), 0.0);
    }

    @Test
    public void testMultiElements() throws Exception {

        assertArrayEquals(multipleValues, roundTrip(DoubleStream.of(multipleValues)), 0.0);
    }

    @Test
    public void testDoubleStreamCloses() throws Exception {

        assertClosesOnSuccess(DoubleStream.of(multipleValues), this::roundTrip);
    }

    // 10-Jan-2025, tatu: I hate these kinds of obscure lambda-ridden tests.
    //    They were accidentally disabled and now fail for... some reason. WTF.
    //   (came from `jackson-modules-java8`, disabled due to JUnit 4->5 migration)
    /*
    @Test
    public void testDoubleStreamClosesOnRuntimeException() throws Exception {

        assertClosesOnRuntimeException(exceptionMessage, this::roundTrip, DoubleStream.of(multipleValues)
            .peek(e -> {
                throw new RuntimeException(exceptionMessage);
            }));

    }

    @Test
    public void testDoubleStreamClosesOnSneakyIOException() throws Exception {
        assertClosesOnIoException(exceptionMessage, this::roundTrip, DoubleStream.of(multipleValues)
            .peek(e -> {
                sneakyThrow(new IOException(exceptionMessage));
            }));

    }

    @Test
    public void testDoubleStreamClosesOnWrappedIoException() {

        assertClosesOnWrappedIoException(exceptionMessage, this::roundTrip, DoubleStream.of(multipleValues)
            .peek(e -> {
                throw new UncheckedIOException(new IOException(exceptionMessage));
            }));

    }
    */

    private double[] roundTrip(DoubleStream stream) {
        String json = objectMapper.writeValueAsString(stream);
        return objectMapper.readValue(json, double[].class);
    }
}