refactor: DecimalToAnyBase (#5343)

src/test/java/com/thealgorithms/conversions/DecimalToAnyBaseTest.java

@@ -0,0 +1,23 @@
+package com.thealgorithms.conversions;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+public class DecimalToAnyBaseTest {
+
+    @ParameterizedTest
+    @CsvSource({"0, 2, 0", "0, 16, 0", "0, 36, 0", "10, 2, 1010", "255, 16, FF", "100, 8, 144", "42, 2, 101010", "1234, 16, 4D2", "1234, 36, YA"})
+    void testConvertToAnyBase(int decimal, int base, String expected) {
+        assertEquals(expected, DecimalToAnyBase.convertToAnyBase(decimal, base));
+    }
+
+    @Test
+    void testBaseOutOfRange() {
+        assertThrows(IllegalArgumentException.class, () -> DecimalToAnyBase.convertToAnyBase(10, 1));
+        assertThrows(IllegalArgumentException.class, () -> DecimalToAnyBase.convertToAnyBase(10, 37));
+    }
+}