making Yaml and BFS of QNDTree work

src/net/torvald/terrarum/tests/QNDTreeTest.kt

@@ -0,0 +1,78 @@
+package net.torvald.terrarum.tests
+
+import net.torvald.terrarum.Yaml
+import net.torvald.terrarum.modulebasegame.ui.UITitleRemoConYaml
+
+/**
+ * Created by minjaesong on 2018-12-08.
+ */
+class QNDTreeTest {
+
+    val treeStr = """
+- File
+ - New : Ctrl-N
+ - Open : Ctrl-O
+ - Open Recent
+  - yaml_example.yaml
+  - Yaml.kt
+ - Close : Ctrl-W
+ - Settings
+ - Line Separators
+  - CRLF
+  - CR
+  - LF
+- Edit
+ - Undo : Ctrl-Z
+ - Redo : Shift-Ctrl-Z
+ - Cut : Ctrl-X
+ - Copy : Ctrl-C
+ - Paste : Ctrl-V
+ - Find
+  - Find : Ctrl-F
+  - Replace : Shift-Ctrl-F
+ - Convert Indents
+  - To Spaces
+   - Set Project Indentation
+  - To Tabs
+- Refactor
+ - Refactor This
+ - Rename : Shift-Ctrl-R
+ - Extract
+  - Variable
+  - Property
+  - Function
+"""
+
+    operator fun invoke() {
+        val treeYaml = Yaml(treeStr)
+        val tree = treeYaml.parse()
+
+        println("\nTest traversePreorder()\n")
+        tree.traversePreorder { qndTreeNode, i ->
+            print("-".repeat(i))
+            print(" ")
+            println("$qndTreeNode <- ${qndTreeNode.parent}")
+        }
+
+        println("\nTest traversePostOrder()\n")
+        tree.traversePostorder { qndTreeNode, i ->
+            print("-".repeat(i))
+            print(" ")
+            println("$qndTreeNode <- ${qndTreeNode.parent}")
+        }
+
+        println("\nTest traverseLevelOrder()\n")
+        tree.traverseLevelorder { qndTreeNode, i ->
+            print("-".repeat(i))
+            print(" ")
+            println("$qndTreeNode <- ${qndTreeNode.parent}")
+        }
+        println("\nLevel 1 nodes:\n")
+        println(tree.getLevelData(1))
+    }
+
+}
+
+fun main(args: Array<String>) {
+    QNDTreeTest().invoke()
+}