import junit.framework.TestCase;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class PascalVectorTest extends TestCase {

    public void test0() {
        assertArraysEquals(new int[] {1}, PascalVectorSolution.pascalVector(0));
    }

    public void test1() {
        assertArraysEquals(new int[] {1, 1}, PascalVectorSolution.pascalVector(1));
    }

    public void test2() {
        assertArraysEquals(new int[] {1, 2, 1}, PascalVectorSolution.pascalVector(2));
    }

    public void test3() {
        assertArraysEquals(new int[] {1, 3, 3, 1}, PascalVectorSolution.pascalVector(3));
    }

    public void test4() {
        assertArraysEquals(new int[] {1, 4, 6, 4, 1}, PascalVectorSolution.pascalVector(4));
    }

    private void assertArraysEquals(final int[] expectedPascalVectorValues, final int[] actualPascalVectorValues) {
        final List<Integer> expectedValuesAsList = Arrays.stream(expectedPascalVectorValues).boxed().collect(Collectors.toList());
        final List<Integer> actualValuesAsList = Arrays.stream(actualPascalVectorValues).boxed().collect(Collectors.toList());
        assertEquals(expectedValuesAsList, actualValuesAsList);
    }

}