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Dev: Added NumberPersistence utility class to find multiplicative and additive persistance (#6612)

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* Add NumberPersistence utility class with multiplicative and additive persistence methods

* Fixed identified style issues
This commit is contained in:
Banula Kumarage
2025-10-04 16:25:26 +05:30
committed by GitHub
parent 7e29be3ad8
commit 6d5170999a
2 changed files with 121 additions and 0 deletions
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42
src/test/java/com/thealgorithms/maths/NumberPersistenceTest.java Normal file
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package com.thealgorithms.maths;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.junit.jupiter.params.provider.ValueSource;
class NumberPersistenceTest {
@ParameterizedTest(name = "multiplicativePersistence({0}) = {1}")
@CsvSource({"0, 0", "7, 0", "217, 2", "39, 3", "999, 4"})
@DisplayName("Test multiplicative persistence with valid inputs")
void testMultiplicativePersistenceValid(int input, int expected) {
assertEquals(expected, NumberPersistence.multiplicativePersistence(input));
}
@ParameterizedTest(name = "multiplicativePersistence({0}) throws IllegalArgumentException")
@ValueSource(ints = {-1, -100, -9999})
@DisplayName("Test multiplicative persistence with negative numbers")
void testMultiplicativePersistenceNegative(int input) {
Exception exception = assertThrows(IllegalArgumentException.class, () -> NumberPersistence.multiplicativePersistence(input));
assertEquals("multiplicativePersistence() does not accept negative values", exception.getMessage());
}
@ParameterizedTest(name = "additivePersistence({0}) = {1}")
@CsvSource({"0, 0", "5, 0", "199, 3", "999, 2", "1234, 2"})
@DisplayName("Test additive persistence with valid inputs")
void testAdditivePersistenceValid(int input, int expected) {
assertEquals(expected, NumberPersistence.additivePersistence(input));
}
@ParameterizedTest(name = "additivePersistence({0}) throws IllegalArgumentException")
@ValueSource(ints = {-1, -100, -9999})
@DisplayName("Test additive persistence with negative numbers")
void testAdditivePersistenceNegative(int input) {
Exception exception = assertThrows(IllegalArgumentException.class, () -> NumberPersistence.additivePersistence(input));
assertEquals("additivePersistence() does not accept negative values", exception.getMessage());
}
}