[新增]wxmlToCanvas

node_modules/widget-ui/test/css-layout.test.ts

@@ -0,0 +1,183 @@
+
+import Element from "../src/element";
+
+test("layout", () => {
+  const container = new Element({
+    width: 100,
+    height: 100,
+    padding: 10,
+    borderWidth: 2
+  })
+
+  const div1 = new Element({
+    left: 5,
+    top: 5,
+    width: 14,
+    height: 14
+  })
+
+  container.add(div1);
+  container.layout();
+  // css-layout 是 border-box
+  expect(container.layoutBox.left).toBe(0);
+  expect(container.layoutBox.top).toBe(0);
+  expect(container.layoutBox.width).toBe(100);
+  expect(container.layoutBox.height).toBe(100);
+
+  expect(div1.layoutBox.left).toBe(10 + 2 + 5);
+  expect(div1.layoutBox.top).toBe(10 + 2 + 5);
+  expect(div1.layoutBox.width).toBe(14);
+  expect(div1.layoutBox.height).toBe(14);
+});
+
+test("overflow", () => {
+  const container = new Element({
+    width: 100,
+    height: 100,
+    padding: 10,
+    borderWidth: 2
+  })
+
+  const div1 = new Element({
+    width: 114,
+    height: 114,
+  })
+
+  container.add(div1);
+  container.layout();
+
+  // 写死尺寸的情况下子元素不收缩父元素不撑开
+  expect(container.layoutBox.width).toBe(100);
+  expect(container.layoutBox.height).toBe(100);
+
+  expect(div1.layoutBox.left).toBe(10 + 2);
+  expect(div1.layoutBox.top).toBe(10 + 2);
+  expect(div1.layoutBox.width).toBe(114);
+  expect(div1.layoutBox.height).toBe(114);
+});
+
+test("right bottom", () => {
+  const container = new Element({
+    width: 100,
+    height: 100,
+    padding: 10,
+    borderWidth: 2
+  })
+
+  const div1 = new Element({
+    width: 14,
+    height: 14,
+    right: 13,
+    bottom: 9,
+    position: "absolute"
+  })
+
+  container.add(div1);
+  container.layout();
+
+  // right bottom 只有在 position 为 absolute 的情况下才有用
+  expect(container.layoutBox.width).toBe(100);
+  expect(container.layoutBox.height).toBe(100);
+
+  // 但这时就是以整个父元素为边界，而不是 border + padding 后的边界
+  expect(div1.layoutBox.left).toBe(100 - 13 - 14);
+  expect(div1.layoutBox.top).toBe(100 - 9 - 14);
+});
+
+test("flex center", () => {
+  const container = new Element({
+    width: 100,
+    height: 100,
+    padding: 10,
+    borderWidth: 2,
+    flexDirection: "row",
+    justifyContent: "center",
+    alignItems: "center"
+  })
+
+  const div1 = new Element({
+    width: 14,
+    height: 14
+  })
+
+  container.add(div1);
+  container.layout();
+  // 使用 flex 水平垂直居中
+  expect(div1.layoutBox.left).toBe((100 - 14)/2);
+  expect(div1.layoutBox.top).toBe((100 - 14)/2);
+})
+
+test("flex top bottom", () => {
+  const container = new Element({
+    width: 100,
+    height: 100,
+    padding: 10,
+    borderWidth: 2,
+    flexDirection: "column",
+    justifyContent: "space-between",
+    alignItems: "stretch"
+  })
+
+  // flex 实现一上一下两行水平填满
+  const div1 = new Element({
+    height: 10
+  })
+
+  const div2 = new Element({
+    height: 20
+  })
+
+  container.add(div1);
+  container.add(div2);
+  container.layout();
+
+  expect(div1.layoutBox.left).toBe(10 + 2);
+  expect(div1.layoutBox.top).toBe(10 + 2);
+  expect(div1.layoutBox.width).toBe(100 - 10*2 - 2*2);
+
+  expect(div2.layoutBox.left).toBe(10 + 2);
+  expect(div2.layoutBox.top).toBe(100 - 10 - 2 - 20);
+  expect(div2.layoutBox.width).toBe(100 - 10*2 - 2*2);
+})
+
+test("rewrite uuid", () => {
+  // 小程序为了保证 webview 和 service 侧的 coverview 不冲突，所以设置了不同的自增起点
+  // uuid 静态方法就是为了根据不同的需求去覆写
+  let uuid = 79648527;
+  Element.uuid = () =>  uuid++;
+  const container = new Element();
+  expect(container.id).toEqual(79648527);
+  const div = new Element();
+  expect(div.id).toEqual(79648528);
+});
+
+test("absolute left top", () => {
+  const container = new Element({
+    width: 300,
+    height: 200,
+    flexDirection: 'row',
+    justifyContent: 'center',
+    alignItems: 'center'
+  })
+  
+
+  const div1 = new Element({
+    width: 80,
+    height: 60
+  })
+  
+  const div2 = new Element({
+    width: 40,
+    height: 30
+  })
+
+  div1.add(div2)
+  container.add(div1)
+  container.layout()
+
+  expect(div1.layoutBox.left).toBe(110)
+  expect(div1.layoutBox.top).toBe(70)
+
+  expect(div2.layoutBox.left).toBe(110)
+  expect(div2.layoutBox.top).toBe(70)
+})