Implemented Binary Search Tree Data Structure with Iterator.

tests/DataStructures/BSTreeTest.php

@@ -571,89 +571,4 @@ public function testIteratorWithTraversalTypes(string $traversalType, array $exp
         }
         $this->assertEquals(count($expected), $index, "Tree iteration did not visit the expected number of nodes.");
     }
-
-    /**
-     * Test: Iterating over the tree (default In-Order)
-     */
-    public function testIteratorInOrder(): void
-    {
-        $expectedInOrder = $this->getExpectedInOrder();
-
-        $expectedKeys = array_keys($expectedInOrder);
-        $expectedValues = array_values($expectedInOrder);
-
-        $index = 0;
-
-        foreach ($this->tree as $node) {
-            $this->assertEquals(
-                $expectedKeys[$index],
-                $node->key,
-                "Did not match the expected inOrder key. Failed tree iteration."
-            );
-            $this->assertEquals(
-                $expectedValues[$index],
-                $node->value,
-                "Did not match the expected inOrder value. Failed tree iteration."
-            );
-            $index++;
-        }
-    }
-
-    /**
-     * Test: Iterating over the tree with Pre-Order traversal
-     */
-    public function testIteratorPreOrder(): void
-    {
-        $this->tree = new BSTree([], 'preOrder');
-
-        $expectedPreOrder = $this->getExpectedPreOrder();
-
-        $expectedKeys = array_keys($expectedPreOrder);
-        $expectedValues = array_values($expectedPreOrder);
-
-        $index = 0;
-
-        foreach ($this->tree as $node) {
-            $this->assertEquals(
-                $expectedKeys[$index],
-                $node->key,
-                "Did not match the expected preOrder key. Failed tree iteration."
-            );
-            $this->assertEquals(
-                $expectedValues[$index],
-                $node->value,
-                "Did not match the expected preOrder value. Failed tree iteration."
-            );
-            $index++;
-        }
-    }
-
-    /**
-     * Test: Iterating over the tree with Post-Order traversal
-     */
-    public function testIteratorPostOrder(): void
-    {
-        $this->tree->setTraversalType('postOrder');
-
-        $expectedPostOrder = $this->getExpectedPostOrder();
-
-        $expectedKeys = array_keys($expectedPostOrder);
-        $expectedValues = array_values($expectedPostOrder);
-
-        $index = 0;
-
-        foreach ($this->tree as $node) {
-            $this->assertEquals(
-                $expectedKeys[$index],
-                $node->key,
-                "Did not match the expected inOrder key. Failed tree iteration."
-            );
-            $this->assertEquals(
-                $expectedValues[$index],
-                $node->value,
-                "Did not match the expected inOrder value. Failed tree iteration."
-            );
-            $index++;
-        }
-    }
 }