@Test(timeout = 100)
public void validDataMatrixMultiply() throws Exception {
int[][] matrix1 = {
{0, 0, -1},
{-5, 3, 1}
};
int[][] matrix2 = {
{2, 1},
{9, 9},
{1, 3}
};
int m = matrix1.length;
int n = matrix2[0].length;
int l = matrix2.length;
int[][] expectedResultMatrix = new int[m][n];
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++) {
for (int k = 0; k < l; k++) {
expectedResultMatrix[i][j] += matrix1[i][k] * matrix2[k][j];
}
}
}
Assert.assertArrayEquals(
expectedResultMatrix, MatrixOperationsUtil.matrixMultiply(matrix1, matrix2));
}
@Test(timeout = 100)
public void testMatrixMultiplyToNumber() throws Exception {
int[][] matrix = {
{0, 0, -1},
{-5, 3, 1}
};
int digit = -2;
int[][] expectedResultMatrix = new int[matrix.length][matrix[0].length];
for (int i = 0; i < expectedResultMatrix.length; i++) {
for (int j = 0; j < expectedResultMatrix[i].length; j++) {
expectedResultMatrix[i][j] = matrix[i][j] * digit;
}
}
Assert.assertArrayEquals(
expectedResultMatrix, MatrixOperationsUtil.matrixMultiplyToNumber(matrix, digit));
}
@Test(timeout = 100)
public void validDataMatrixAddition() throws Exception {
int[][] matrix1 = {
{0, 0, -1, 5},
{-5, 3, 1, 4}
};
int[][] matrix2 = {
{-2, -1, 1, 7},
{-9, 9, -1, 3}
};
int[][] expectedResultMatrix = new int[matrix1.length][matrix1[0].length];
for (int i = 0; i < expectedResultMatrix.length; i++) {
for (int j = 0; j < expectedResultMatrix[i].length; j++) {
expectedResultMatrix[i][j] = matrix1[i][j] + matrix2[i][j];
}
}
Assert.assertArrayEquals(
expectedResultMatrix, MatrixOperationsUtil.matrixAddition(matrix1, matrix2));
}
@Test(timeout = 100, expected = InappropriateMatrixDimensionException.class)
public void invalidDataMatrixSubtraction() throws Exception {
int[][] matrix1 = {
{0, 0, -1},
{-5, 3, 1, 4}
};
int[][] matrix2 = {
{-2, -1, 1, 7},
{-9, 9, -1, 3}
};
int[][] expectedResultMatrix = new int[matrix1.length][matrix1[0].length];
for (int i = 0; i < expectedResultMatrix.length; i++) {
for (int j = 0; j < expectedResultMatrix[i].length; j++) {
expectedResultMatrix[i][j] = matrix1[i][j] - matrix2[i][j];
}
}
Assert.assertArrayEquals(
expectedResultMatrix, MatrixOperationsUtil.matrixSubtraction(matrix1, matrix2));
}