Added program to check Lucky number (#6962)

added program for lucky number

src/test/java/com/thealgorithms/maths/LuckyNumberTest.java

@@ -0,0 +1,32 @@
+package com.thealgorithms.maths;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+class LuckyNumberTest {
+
+    @ParameterizedTest
+    @CsvSource({"1", "3", "13", "49", "109", "459", "949"})
+    void luckyNumbersTest(int n) {
+        assertTrue(LuckyNumber.isLucky(n));
+        assertTrue(LuckyNumber.isLuckyNumber(n));
+    }
+
+    @ParameterizedTest
+    @CsvSource({"2", "17", "100", "300", "700"})
+    void nonLuckyNumbersTest(int n) {
+        assertFalse(LuckyNumber.isLucky(n));
+        assertFalse(LuckyNumber.isLuckyNumber(n));
+    }
+
+    @ParameterizedTest
+    @CsvSource({"0", "-1"})
+    void throwsNegativeNumbersNotAllowed(int n) {
+        assertThrows(IllegalArgumentException.class, () -> LuckyNumber.isLucky(n));
+        assertThrows(IllegalArgumentException.class, () -> LuckyNumber.isLuckyNumber(n));
+    }
+}