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Create package prime, matrix and games (#6139)
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src/test/java/com/thealgorithms/matrix/MatrixUtilTest.java
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80
src/test/java/com/thealgorithms/matrix/MatrixUtilTest.java
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package com.thealgorithms.matrix;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import com.thealgorithms.matrix.utils.MatrixUtil;
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import java.math.BigDecimal;
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import java.util.Objects;
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import org.junit.jupiter.api.Test;
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class MatrixUtilTest {
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@Test
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void add() {
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final BigDecimal[][] matrix1 = {
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{new BigDecimal(3), BigDecimal.TWO},
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{BigDecimal.ZERO, BigDecimal.ONE},
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};
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final BigDecimal[][] matrix2 = {
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{BigDecimal.ONE, new BigDecimal(3)},
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{BigDecimal.TWO, BigDecimal.ZERO},
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};
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final BigDecimal[][] actual = MatrixUtil.add(matrix1, matrix2).orElseThrow(() -> new AssertionError("Could not compute matrix!"));
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final BigDecimal[][] expected = {
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{new BigDecimal(4), new BigDecimal(5)},
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{BigDecimal.TWO, BigDecimal.ONE},
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};
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assertTrue(Objects.deepEquals(actual, expected));
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}
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@Test
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void subtract() {
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final BigDecimal[][] matrix1 = {
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{BigDecimal.ONE, new BigDecimal(4)},
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{new BigDecimal(5), new BigDecimal(6)},
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};
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final BigDecimal[][] matrix2 = {
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{BigDecimal.TWO, BigDecimal.ZERO},
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{new BigDecimal(-2), new BigDecimal(-3)},
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};
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final BigDecimal[][] actual = MatrixUtil.subtract(matrix1, matrix2).orElseThrow(() -> new AssertionError("Could not compute matrix!"));
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final BigDecimal[][] expected = {
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{new BigDecimal(-1), new BigDecimal(4)},
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{new BigDecimal(7), new BigDecimal(9)},
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};
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assertTrue(Objects.deepEquals(actual, expected));
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}
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@Test
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void multiply() {
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final BigDecimal[][] matrix1 = {
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{BigDecimal.ONE, BigDecimal.TWO, new BigDecimal(3)},
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{new BigDecimal(4), new BigDecimal(5), new BigDecimal(6)},
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{new BigDecimal(7), new BigDecimal(8), new BigDecimal(9)},
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};
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final BigDecimal[][] matrix2 = {
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{BigDecimal.ONE, BigDecimal.TWO},
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{new BigDecimal(3), new BigDecimal(4)},
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{new BigDecimal(5), new BigDecimal(6)},
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};
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final BigDecimal[][] actual = MatrixUtil.multiply(matrix1, matrix2).orElseThrow(() -> new AssertionError("Could not compute matrix!"));
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final BigDecimal[][] expected = {
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{new BigDecimal(22), new BigDecimal(28)},
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{new BigDecimal(49), new BigDecimal(64)},
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{new BigDecimal(76), new BigDecimal(100)},
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};
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assertTrue(Objects.deepEquals(actual, expected));
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}
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}
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