test(attribute): add testcase file for attribute

__tests__/unit/geometry/attribute/color-spec.ts

@@ -0,0 +1,13 @@
+import {
+  Color,
+} from '../../../../src/geometry/attribute';
+
+describe('attribute color', () => {
+  it('value', () => {
+    expect(Color).toBeDefined();
+  });
+
+  it('callback', () => {
+    expect(Color).toBeDefined();
+  });
+});

__tests__/unit/geometry/attribute/index-spec.ts

@@ -0,0 +1,20 @@
+import {
+  Attribute,
+  Color,
+  Position,
+  Shape,
+  Size,
+} from '../../../../src/geometry/attribute';
+
+// TODO 单测 100%
+describe('attribute', () => {
+  it('export', () => {
+    expect([Attribute,
+      Color,
+      Position,
+      Shape,
+      Size,
+    ].every(e => !!e)).toBe(true);
+  });
+});
+

__tests__/unit/geometry/attribute/position-spec.ts

@@ -0,0 +1,13 @@
+import {
+  Position,
+} from '../../../../src/geometry/attribute';
+
+describe('attribute position', () => {
+  it('value', () => {
+    expect(Position).toBeDefined();
+  });
+
+  it('callback', () => {
+    expect(Position).toBeDefined();
+  });
+});

__tests__/unit/geometry/attribute/shape-spec.ts

@@ -0,0 +1,13 @@
+import {
+  Shape,
+} from '../../../../src/geometry/attribute';
+
+describe('attribute shape', () => {
+  it('value', () => {
+    expect(Shape).toBeDefined();
+  });
+
+  it('callback', () => {
+    expect(Shape).toBeDefined();
+  });
+});

__tests__/unit/geometry/attribute/size-spec.ts

@@ -0,0 +1,13 @@
+import {
+  Size,
+} from '../../../../src/geometry/attribute';
+
+describe('attribute color', () => {
+  it('value', () => {
+    expect(Size).toBeDefined();
+  });
+
+  it('callback', () => {
+    expect(Size).toBeDefined();
+  });
+});