ActivitySelectionTest.java

package com.thealgorithms.greedyalgorithms;

import static java.util.Collections.singletonList;
import static org.junit.jupiter.api.Assertions.assertEquals;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.jupiter.api.Test;

public class ActivitySelectionTest {
    @Test
    public void testActivitySelection() {
        int[] start = {1, 3, 0, 5, 8, 5};
        int[] end = {2, 4, 6, 7, 9, 9};

        ArrayList<Integer> result = ActivitySelection.activitySelection(start, end);
        ArrayList<Integer> expected = new ArrayList<>(Arrays.asList(0, 1, 3, 4));

        assertEquals(expected, result);
    }

    @Test
    public void testSingleActivity() {
        int[] start = {1};
        int[] end = {2};

        ArrayList<Integer> result = ActivitySelection.activitySelection(start, end);
        List<Integer> expected = singletonList(0);

        assertEquals(expected, result);
    }

    @Test
    public void testNoOverlap() {
        int[] start = {1, 2, 3};
        int[] end = {2, 3, 4};

        ArrayList<Integer> result = ActivitySelection.activitySelection(start, end);
        ArrayList<Integer> expected = new ArrayList<>(Arrays.asList(0, 1, 2));

        assertEquals(expected, result);
    }
}