test: add test case for reverting more depth tree string

Author: aprilandjan

fixtures/more-depth-reverted.txt

@@ -0,0 +1,12 @@
+.
+# a
+## b
+### b
+#### b
+##### b
+###### b
+####### b
+######## b
+######### b
+########## b
+## b

fixtures/more-depth.txt

@@ -0,0 +1,12 @@
+.
+└── a
+    ├── b
+    │   └── b
+    │       └── b
+    │           └── b
+    │               └── b
+    │                   └── b
+    │                       └── b
+    │                           └── b
+    │                               └── b
+    └── b

src/test/extension.test.ts

@@ -25,4 +25,12 @@ suite('Extension Tests', function () {
     });
     assert(reverted.trim() === rootReverted.trim());
   });
+
+  // https://github.com/aprilandjan/ascii-tree-generator/pull/11
+  test('revert more-depth tree string to text', function () {
+    const origin = fs.readFileSync(path.join(__dirname, '../../fixtures/more-depth-reverted.txt'), 'utf8');
+    const treeString = fs.readFileSync(path.join(__dirname, '../../fixtures/more-depth.txt'), 'utf8');
+    const reverted = revertTreeString(treeString);
+    assert(origin.trim() === reverted.trim());
+  });
 });