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61fbb1855c
* Add Zeller's Congruence utility class and unit tests * fixed identified bugs * fixed pmd failure
37 lines
1.9 KiB
Java
37 lines
1.9 KiB
Java
package com.thealgorithms.maths;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import java.util.stream.Stream;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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class ZellersCongruenceTest {
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static Stream<Arguments> validDates() {
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return Stream.of(Arguments.of("01-01-2000", "Saturday"), Arguments.of("12-25-2021", "Saturday"), Arguments.of("07-04-1776", "Thursday"), Arguments.of("02-29-2020", "Saturday"), Arguments.of("03-01-1900", "Thursday"), Arguments.of("03/01/1900", "Thursday"));
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}
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static Stream<Arguments> invalidDates() {
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return Stream.of(Arguments.of("13-01-2000", "Month must be between 1 and 12."), Arguments.of("02-30-2020", "Invalid date."), Arguments.of("00-15-2020", "Month must be between 1 and 12."), Arguments.of("01-01-0000", "Year must be between 46 and 8499."),
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Arguments.of("01/01/200", "Input date must be 10 characters long in the format MM-DD-YYYY or MM/DD/YYYY."), Arguments.of("01@01>2000", "Date separator must be '-' or '/'."), Arguments.of("aa-01-1900", "Invalid numeric part: aa"),
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Arguments.of(null, "Input date must be 10 characters long in the format MM-DD-YYYY or MM/DD/YYYY."));
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}
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@ParameterizedTest
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@MethodSource("validDates")
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void testValidDates(String inputDate, String expectedDay) {
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String result = ZellersCongruence.calculateDay(inputDate);
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assertEquals("The date " + inputDate + " falls on a " + expectedDay + ".", result);
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}
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@ParameterizedTest
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@MethodSource("invalidDates")
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void testInvalidDates(String inputDate, String expectedErrorMessage) {
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Exception exception = assertThrows(IllegalArgumentException.class, () -> ZellersCongruence.calculateDay(inputDate));
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assertEquals(expectedErrorMessage, exception.getMessage());
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}
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}
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