102 lines
3.2 KiB
Java
102 lines
3.2 KiB
Java
import org.junit.jupiter.api.Test;
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import static org.junit.Assert.assertNull;
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import static org.junit.jupiter.api.Assertions.*;
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public class VectorTest {
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@Test
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void testScalarMultiplicationVariants() {
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int[] v1 = { 1, -2, 3 };
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Vector.scalarMultiplication(v1, 2);
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assertArrayEquals(new int[] { 2, 4, 6 }, v1);
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int[] v2 = { 7, 8, 15 };
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Vector.scalarMultiplication(v2, -1);
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assertArrayEquals(new int[] { -7, -8, -15 }, v2);
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int[] v3 = { 0,0,0};
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Vector.scalarMultiplication(v3, 5);
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assertArrayEquals(new int[] { 0, 0, 0 }, v3);
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int[] v4 = {};
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Vector.scalarMultiplication(v4, 2);
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assertArrayEquals(new int[] { 0,0,0}, v4);
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int[] v5 = null;
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Vector.scalarMultiplication(v5, 5);
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assertArrayEquals(null, v5);
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}
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@Test
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void testVectorProduct2DVariants() {
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int ergebnis1 = -2;
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System.out.println("Erwartet: " + ergebnis1);
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Vector.vectorProduct(new int[] { 3, 4 }, new int[] { 5, 6 });
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int ergebnis2 = -1;
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System.out.println("Erwartet: " + ergebnis2);
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Vector.vectorProduct(new int[] { 0, 1 }, new int[] { 1, 0 });
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}
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@Test
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void testVectorProduct3DVariants() {
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int[] ergebnis1 = { -3, 6, -3 };
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System.out.println("Erwartet: [" + ergebnis1[0] + ", " + ergebnis1[1] + ", " + ergebnis1[2] + "]");
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Vector.vectorProduct(new int[] { 1, 2, 3 }, new int[] { 4, 5, 6 });
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int[] ergebnis2 = { -1, 0, 0 };
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System.out.println("Erwartet: [" + ergebnis2[0] + ", " + ergebnis2[1] + ", " + ergebnis2[2] + "]");
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Vector.vectorProduct(new int[] { 0, 0, 1 }, new int[] { 0, 1, 0 });
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}
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@Test
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void testVectorProductInvalidDimensions() {
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System.out.println("Erwartet: illegale Dimension");
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Vector.vectorProduct(new int[] { 1, 0 }, new int[] { 0, 1, 0 });
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}
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@Test
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void testVectorLengthVariants() {
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assertEquals(5.0, Vector.vectorLength(new int[] { 3, 4 }), 0.001);
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assertEquals(3.0, Vector.vectorLength(new int[] { 1, 2, 2 }), 0.001);
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assertEquals(0.0, Vector.vectorLength(new int[] { 0, 0, 0 }), 0.001);
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}
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@Test
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void testMatrixMultiplicationVariants() {
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int[][] matrix = {
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{ 1, 2, 3 },
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{ 4, 5, 6 },
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{ 7, 8, 9 }
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};
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int[][] expected = {
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{ 2, 4, 6 },
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{ 8, 10, 12 },
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{ 14, 16, 18 }
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};
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assertArrayEquals(expected, Vector.matrixMultiplication(matrix, 2));
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int[][] zeroMatrix = {
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{ 1, -2, -6 },
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{ -3, 4, 5 },
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{ -70, 12, -8 }
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};
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int[][] expectedZero = {
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{ 0, 0, 0 },
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{ 0, 0, 0 },
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{ 0, 0, 0 }
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};
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assertArrayEquals(expectedZero, Vector.matrixMultiplication(zeroMatrix, 0));
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}
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@Test
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void testMatrixMultiplicationInvalidCases() {
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int[][] non3DSquare = {
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{ 1, 2 },
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{ 3, 4 }
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};
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assertNull(Vector.matrixMultiplication(non3DSquare, 3));
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int[][] empty = new int[0][0];
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assertNull(Vector.matrixMultiplication(empty, 2));
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}
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} |