refactor: AnyBaseToDecimal (#5357)

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

@@ -0,0 +1,22 @@
+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 AnyBaseToDecimalTest {
+    @ParameterizedTest
+    @CsvSource({"1010, 2, 10", "777, 8, 511", "999, 10, 999", "ABCDEF, 16, 11259375", "XYZ, 36, 44027", "0, 2, 0", "A, 16, 10", "Z, 36, 35"})
+    void testConvertToDecimal(String input, int radix, int expected) {
+        assertEquals(expected, AnyBaseToDecimal.convertToDecimal(input, radix));
+    }
+
+    @Test
+    void testIncorrectInput() {
+        assertThrows(NumberFormatException.class, () -> AnyBaseToDecimal.convertToDecimal("G", 16));
+        assertThrows(NumberFormatException.class, () -> AnyBaseToDecimal.convertToDecimal("XYZ", 10));
+    }
+}