ConvolutionTest.java

packagecom.thealgorithms.maths;

importstaticorg.junit.jupiter.api.Assertions.assertArrayEquals;

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

publicclassConvolutionTest {

recordConvolutionTestCase(Stringdescription, double[] signalA, double[] signalB, double[] expected) {
 }

@ParameterizedTest(name = "{0}")
@MethodSource("provideTestCases")
voidtestConvolution(ConvolutionTestCasetestCase) {
double[] result = Convolution.convolution(testCase.signalA, testCase.signalB);
assertArrayEquals(testCase.expected, result, 1e-9, testCase.description);
 }

privatestaticStream<ConvolutionTestCase> provideTestCases() {
returnStream.of(newConvolutionTestCase("Basic convolution", newdouble[] {1, 2, 3}, newdouble[] {4, 5, 6}, newdouble[] {4, 13, 28, 27, 18}), newConvolutionTestCase("Convolution with zero elements", newdouble[] {0, 0, 0}, newdouble[] {1, 2, 3}, newdouble[] {0, 0, 0, 0, 0}),
newConvolutionTestCase("Convolution with single element", newdouble[] {2}, newdouble[] {3}, newdouble[] {6}), newConvolutionTestCase("Convolution with different sizes", newdouble[] {1, 2}, newdouble[] {3, 4, 5}, newdouble[] {3, 10, 13, 10}),
newConvolutionTestCase("Convolution with negative values", newdouble[] {1, -2, 3}, newdouble[] {-1, 2, -3}, newdouble[] {-1, 4, -10, 12, -9}),
newConvolutionTestCase("Convolution with large numbers", newdouble[] {1e6, 2e6}, newdouble[] {3e6, 4e6}, newdouble[] {3e12, 1e13, 8e12}));
 }
}