FindMaxTest.java

packagecom.thealgorithms.maths;

importstaticorg.junit.jupiter.api.Assertions.assertThrows;

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

publicclassFindMaxTest {

@ParameterizedTest
@MethodSource("inputStream")
voidnumberTests(intexpected, int[] input) {
Assertions.assertEquals(expected, FindMax.findMax(input));
 }

privatestaticStream<Arguments> inputStream() {
returnStream.of(Arguments.of(10, newint[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}), Arguments.of(5, newint[] {5, 5, 5, 5, 5}), Arguments.of(0, newint[] {-1, 0}), Arguments.of(-1, newint[] {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1}), Arguments.of(9, newint[] {3, -2, 3, 9, -4, -4, 8}));
 }

@Test
publicvoidtestFindMaxThrowsExceptionForEmptyInput() {
assertThrows(IllegalArgumentException.class, () -> FindMax.findMax(newint[] {}));
 }
}