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Commit 27ada8a

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Migrate recursive reverse string method and tests to ReverseString (#6504)
* Migrate recursive reverse string method and tests to ReverseString - Moved recursive reverse method from ReverseStringRecursive.java to ReverseString.java - Moved tests from ReverseStringRecursiveTest.java to ReverseStringTest.java - Deleted old ReverseStringRecursive files * Fix formatting for ReverseStringTest.java as per clang-format linter
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+22
-37
lines changed

4 files changed

+22
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‎src/main/java/com/thealgorithms/strings/ReverseString.java

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@@ -86,4 +86,17 @@ public static String reverseStringUsingStack(String str) {
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}
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return reversedString.toString();
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}
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/**
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* Reverse the String using Recursion
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* @param str string to be reversed
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* @return reversed string
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*/
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public static String reverseStringUsingRecursion(String str) {
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if (str.isEmpty()) {
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return str;
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} else {
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return reverseStringUsingRecursion(str.substring(1)) + str.charAt(0);
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}
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}
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}

‎src/main/java/com/thealgorithms/strings/ReverseStringRecursive.java

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‎src/test/java/com/thealgorithms/strings/ReverseStringRecursiveTest.java

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‎src/test/java/com/thealgorithms/strings/ReverseStringTest.java

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@@ -7,6 +7,7 @@
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import org.junit.jupiter.api.Test;
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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.CsvSource;
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import org.junit.jupiter.params.provider.MethodSource;
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public class ReverseStringTest {
@@ -44,4 +45,12 @@ public void testReverseStringUsingStack(String input, String expectedOutput) {
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public void testReverseStringUsingStackWithNullInput() {
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assertThrows(IllegalArgumentException.class, () -> ReverseString.reverseStringUsingStack(null));
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}
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@ParameterizedTest
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@CsvSource({"'Hello World', 'dlroW olleH'", "'helloworld', 'dlrowolleh'", "'123456789', '987654321'", "'', ''", "'A', 'A'", "'!123 ABC xyz!', '!zyx CBA 321!'", "'Abc 123 Xyz', 'zyX 321 cbA'", "'12.34,56;78:90', '09:87;65,43.21'", "'abcdEFGHiJKL', 'LKJiHGFEdcba'",
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"'MixOf123AndText!', '!txeTdnA321fOxiM'"})
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public void
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testReverseStringUsingRecursion(String input, String expectedOutput) {
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assertEquals(expectedOutput, ReverseString.reverseStringUsingRecursion(input));
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}
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}

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