new-shapes/src/test/java/ovh/gasser/newshapes/util/StreamableTest.java

package ovh.gasser.newshapes.util;

import org.junit.jupiter.api.Test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

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

class StreamableTest {

    private static class TestStreamable implements Streamable<String> {
        private final List<String> elements;

        TestStreamable(List<String> elements) {
            this.elements = new ArrayList<>(elements);
        }

        @Override
        public java.util.Iterator<String> iterator() {
            return elements.iterator();
        }
    }

    @Test
    void testStreamReturnsStreamOfElements() {
        List<String> testData = Arrays.asList("a", "b", "c");
        Streamable<String> streamable = new TestStreamable(testData);

        Stream<String> result = streamable.stream();

        assertNotNull(result);
        assertEquals(testData, result.toList());
    }

    @Test
    void testStreamEmptyCollection() {
        List<String> emptyData = new ArrayList<>();
        Streamable<String> streamable = new TestStreamable(emptyData);

        Stream<String> result = streamable.stream();

        assertNotNull(result);
        assertTrue(result.toList().isEmpty());
    }
}