Add tests for RomanNumerals and clarify their uses in javadocs

1 files changed, 35 insertions, 0 deletions

diff --git a/src/test/java/de/hysky/skyblocker/utils/RomanNumeralsTest.java b/src/test/java/de/hysky/skyblocker/utils/RomanNumeralsTest.java
new file mode 100644
index 00000000..35bd76ee
--- /dev/null
+++ b/src/test/java/de/hysky/skyblocker/utils/RomanNumeralsTest.java
@@ -0,0 +1,35 @@
+package de.hysky.skyblocker.utils;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class RomanNumeralsTest {
+	@Test
+	void testToRoman() {
+		// Test the first 50 numbers
+		String[] expected = new String[]{"I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII", "XIII", "XIV", "XV", "XVI", "XVII", "XVIII", "XIX", "XX", "XXI", "XXII", "XXIII", "XXIV", "XXV", "XXVI", "XXVII", "XXVIII", "XXIX", "XXX", "XXXI", "XXXII", "XXXIII", "XXXIV", "XXXV", "XXXVI", "XXXVII", "XXXVIII", "XXXIX", "XL", "XLI", "XLII", "XLIII", "XLIV", "XLV", "XLVI", "XLVII", "XLVIII", "XLIX", "L"};
+		for (int i = 1; i <= 50; i++) {
+			Assertions.assertEquals(i, RomanNumerals.romanToDecimal(expected[i-1]));
+		}
+		Assertions.assertEquals(100, RomanNumerals.romanToDecimal("C"));
+		Assertions.assertEquals(400, RomanNumerals.romanToDecimal("CD"));
+		Assertions.assertEquals(500, RomanNumerals.romanToDecimal("D"));
+		Assertions.assertEquals(900, RomanNumerals.romanToDecimal("CM"));
+		Assertions.assertEquals(1000, RomanNumerals.romanToDecimal("M"));
+		Assertions.assertEquals(1999, RomanNumerals.romanToDecimal("MCMXCIX"));
+	}
+
+	@Test
+	void isValidRoman() {
+		Assertions.assertTrue(RomanNumerals.isValidRomanNumeral("I"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral("AI"));
+		Assertions.assertTrue(RomanNumerals.isValidRomanNumeral("CMI"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral(" CMI"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral("XI I"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral("A"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral("15"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral("MCMLXXXAIV"));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral(null));
+		Assertions.assertFalse(RomanNumerals.isValidRomanNumeral(""));
+	}
+}