Initial commit

test/tree_view_controller_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_treeview/src/models/node.dart';
+import 'package:flutter_treeview/src/tree_view_controller.dart';
+
+void main() {
+  List<Node> nodes = [
+    Node(label: 'documents', key: 'docs', children: [
+      Node(label: 'personal', key: 'd3', children: [
+        Node(label: 'Resume.docx', key: 'pd1'),
+        Node(label: 'Cover Letter.docx', key: 'pd2'),
+      ]),
+      Node(label: 'Inspection.docx', key: 'd1'),
+      Node(label: 'Invoice.docx', key: 'd2'),
+    ]),
+    Node(
+      label: 'MeetingReport.xls',
+      key: 'mrxls',
+    ),
+    Node(
+      label: 'MeetingReport.pdf',
+      key: 'mrpdf',
+    ),
+    Node(
+      label: 'Demo.zip',
+      key: 'demo',
+    ),
+  ];
+  group('TreeViewController Tests', () {
+    test('...get node', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      Node? validNode = controller.getNode('pd1');
+      Node? invalidNode = controller.getNode('xpd1');
+      expect(controller.children.length, 4);
+      expect(validNode.runtimeType, Node);
+      expect(validNode!.label, 'Resume.docx');
+      expect(invalidNode.runtimeType, Null);
+    });
+    test('...get parent', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      Node? nodeParent = controller.getParent('pd1');
+      Node? rootParent = controller.getParent('docs');
+      Node? noParent = controller.getParent('xpd1');
+      expect(nodeParent.runtimeType, Node);
+      expect(nodeParent!.key, 'd3');
+      expect(rootParent.runtimeType, Node);
+      expect(rootParent!.key, 'docs');
+      expect(noParent.runtimeType, Null);
+    });
+    test('...update node', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      Node? node = controller.getNode('pd1');
+      Node updatedNode = node!.copyWith(
+        key: 'pdf1',
+        label: 'My Resume.pdf',
+      );
+      List<Node> newChildren = controller.updateNode(node.key, updatedNode);
+      controller = TreeViewController(children: newChildren);
+      Node? validNode = controller.getNode('pdf1');
+      Node? invalidNode = controller.getNode('pd1');
+      expect(validNode.runtimeType, Node);
+      expect(validNode!.key, updatedNode.key);
+      expect(validNode.label, updatedNode.label);
+      expect(invalidNode.runtimeType, Null);
+    });
+    test('...delete child node', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      List<Node> newChildren = controller.deleteNode('pd1');
+      controller = TreeViewController(children: newChildren);
+      Node? invalidNode = controller.getNode('pd1');
+      expect(invalidNode.runtimeType, Null);
+    });
+    test('...delete parent node', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      List<Node> newChildren = controller.deleteNode('docs');
+      controller = TreeViewController(children: newChildren);
+      expect(controller.getNode('docs'), null);
+      expect(controller.getNode('pd1'), null);
+      expect(controller.getNode('pd2'), null);
+      expect(controller.getNode('d3'), null);
+      expect(controller.getNode('d1'), null);
+      expect(controller.getNode('d2'), null);
+    });
+    test('...add child node', () {
+      TreeViewController controller = TreeViewController(children: nodes);
+      Node? invalidNode = controller.getNode('pd3');
+      expect(invalidNode.runtimeType, Null);
+      Node newNode = Node(label: 'References.docx', key: 'pd3');
+      List<Node> newChildren = controller.addNode('d3', newNode);
+      controller = TreeViewController(children: newChildren);
+      Node? validNode = controller.getNode('pd3');
+      expect(validNode.runtimeType, Node);
+      expect(validNode!.label, newNode.label);
+    });
+  });
+}