InverseOfMatrixTest.java

packagecom.thealgorithms.matrix;
importstaticorg.junit.jupiter.api.Assertions.assertArrayEquals;

importjava.util.stream.Stream;
importorg.junit.jupiter.params.ParameterizedTest;
importorg.junit.jupiter.params.provider.Arguments;
importorg.junit.jupiter.params.provider.MethodSource;

classInverseOfMatrixTest {

@ParameterizedTest
@MethodSource("provideTestCases")
voidtestInvert(double[][] matrix, double[][] expectedInverse) {
double[][] result = InverseOfMatrix.invert(matrix);
assertMatrixEquals(expectedInverse, result);
 }

privatestaticStream<Arguments> provideTestCases() {
returnStream.of(Arguments.of(newdouble[][] {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}, newdouble[][] {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}), Arguments.of(newdouble[][] {{4, 7}, {2, 6}}, newdouble[][] {{0.6, -0.7}, {-0.2, 0.4}}));
 }

privatevoidassertMatrixEquals(double[][] expected, double[][] actual) {
for (inti = 0; i < expected.length; i++) {
assertArrayEquals(expected[i], actual[i], 1.0E-10, "Row " + i + " is not equal");
 }
 }
}