Move simple_render_tree into tests as render_flex

sky/tests/raw/render_flex.dart

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../resources/third_party/unittest/unittest.dart';
+import '../resources/unit.dart';
+import 'dart:sky' as sky;
+import 'package:sky/framework/app.dart';
+import 'package:sky/framework/layout2.dart';
+
+class RenderSolidColor extends RenderDecoratedBox {
+  final sky.Size desiredSize;
+  final int backgroundColor;
+
+  RenderSolidColor(int backgroundColor, { this.desiredSize: const sky.Size.infinite() })
+      : backgroundColor = backgroundColor,
+        super(new BoxDecoration(backgroundColor: backgroundColor)) {
+  }
+
+  BoxDimensions getIntrinsicDimensions(BoxConstraints constraints) {
+    return new BoxDimensions.withConstraints(constraints,
+                                             width: desiredSize.width,
+                                             height: desiredSize.height);
+  }
+
+  void performLayout() {
+    size = constraints.constrain(desiredSize);
+  }
+
+  void handlePointer(sky.PointerEvent event) {
+    if (event.type == 'pointerdown')
+      decoration = new BoxDecoration(backgroundColor: 0xFFFF0000);
+    else if (event.type == 'pointerup')
+      decoration = new BoxDecoration(backgroundColor: backgroundColor);
+  }
+}
+
+AppView app;
+
+void main() {
+  initUnit();
+
+  test("should flex", () {
+    var root = new RenderFlex(
+        direction: FlexDirection.Vertical,
+        decoration: new BoxDecoration(backgroundColor: 0xFF000000));
+
+    void addFlexChild(RenderFlex parent, int backgroundColor, { int flex: 0 }) {
+      RenderNode child = new RenderSolidColor(backgroundColor);
+      parent.add(child);
+      child.parentData.flex = flex;
+    }
+
+    // Yellow bar at top
+    addFlexChild(root, 0xFFFFFF00, flex: 1);
+
+    // Turquoise box
+    root.add(new RenderSolidColor(0x7700FFFF, desiredSize: new sky.Size(100.0, 100.0)));
+
+    // Green and cyan render block with padding
+    var renderBlock = new RenderBlock(decoration: new BoxDecoration(backgroundColor: 0xFFFFFFFF));
+
+    renderBlock.add(new RenderSolidColor(0xFF00FF00, desiredSize: new sky.Size(100.0, 50.0)));
+    renderBlock.add(new RenderSolidColor(0x7700FFFF, desiredSize: new sky.Size(50.0, 100.0)));
+
+    root.add(new RenderPadding(const EdgeDims(10.0, 10.0, 10.0, 10.0), renderBlock));
+
+    var row = new RenderFlex(
+      direction: FlexDirection.Horizontal,
+      decoration: new BoxDecoration(backgroundColor: 0xFF333333));
+
+    // Purple and blue cells
+    addFlexChild(row, 0x77FF00FF, flex: 1);
+    addFlexChild(row, 0xFF0000FF, flex: 2);
+
+    root.add(row);
+    row.parentData.flex = 3;
+
+    app = new AppView(root);
+
+    expect(root.size.width, equals(sky.view.width));
+    expect(root.size.height, equals(sky.view.height));
+    expect(renderBlock.size.width, equals(sky.view.width - 20.0));
+  });
+}