Rename Recursion package (#6081)

src/test/java/com/thealgorithms/recursion/FibonacciSeriesTest.java

@@ -0,0 +1,27 @@
+package com.thealgorithms.recursion;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class FibonacciSeriesTest {
+
+    @Test
+    public void testFibonacci() {
+        assertEquals(0, FibonacciSeries.fibonacci(0));
+        assertEquals(1, FibonacciSeries.fibonacci(1));
+        assertEquals(1, FibonacciSeries.fibonacci(2));
+        assertEquals(2, FibonacciSeries.fibonacci(3));
+        assertEquals(3, FibonacciSeries.fibonacci(4));
+        assertEquals(5, FibonacciSeries.fibonacci(5));
+        assertEquals(8, FibonacciSeries.fibonacci(6));
+        assertEquals(13, FibonacciSeries.fibonacci(7));
+        assertEquals(21, FibonacciSeries.fibonacci(8));
+        assertEquals(34, FibonacciSeries.fibonacci(9));
+        assertEquals(55, FibonacciSeries.fibonacci(10));
+        assertEquals(89, FibonacciSeries.fibonacci(11));
+        assertEquals(144, FibonacciSeries.fibonacci(12));
+        assertEquals(233, FibonacciSeries.fibonacci(13));
+        assertEquals(377, FibonacciSeries.fibonacci(14));
+    }
+}

src/test/java/com/thealgorithms/recursion/GenerateSubsetsTest.java

@@ -0,0 +1,36 @@
+package com.thealgorithms.recursion;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+public final class GenerateSubsetsTest {
+
+    @Test
+    void subsetRecursionTestOne() {
+        String str = "abc";
+        String[] expected = new String[] {"abc", "ab", "ac", "a", "bc", "b", "c", ""};
+
+        List<String> ans = GenerateSubsets.subsetRecursion(str);
+        assertArrayEquals(ans.toArray(), expected);
+    }
+
+    @Test
+    void subsetRecursionTestTwo() {
+        String str = "cbf";
+        String[] expected = new String[] {"cbf", "cb", "cf", "c", "bf", "b", "f", ""};
+
+        List<String> ans = GenerateSubsets.subsetRecursion(str);
+        assertArrayEquals(ans.toArray(), expected);
+    }
+
+    @Test
+    void subsetRecursionTestThree() {
+        String str = "aba";
+        String[] expected = new String[] {"aba", "ab", "aa", "a", "ba", "b", "a", ""};
+
+        List<String> ans = GenerateSubsets.subsetRecursion(str);
+        assertArrayEquals(ans.toArray(), expected);
+    }
+}