test: wip tests for inheritance and mixins

packages/core/__tests__/inheritance.spec.ts

@@ -0,0 +1,44 @@
+import { Component, createInstance } from '@vue/renderer-test'
+
+describe('class inheritance', () => {
+  it('should merge data', () => {
+    class Base extends Component {
+      foo = 1
+      data() {
+        return {
+          bar: 2
+        }
+      }
+    }
+
+    class Child extends Base {
+      foo: number
+      bar: number
+      baz: number
+      qux: number = 4
+
+      data(): any {
+        return {
+          baz: 3
+        }
+      }
+    }
+
+    const child = createInstance(Child)
+
+    expect(child.foo).toBe(1)
+    expect(child.bar).toBe(2)
+    expect(child.baz).toBe(3)
+    expect(child.qux).toBe(4)
+  })
+
+  it('should merge props', () => {})
+
+  it('should merge lifecycle hooks', () => {})
+
+  it('should merge watchers', () => {})
+
+  it('should inherit methods', () => {})
+
+  it('should inherit computed properties', () => {})
+})

packages/core/__tests__/mixins.spec.ts

@@ -0,0 +1,7 @@
+describe('mixins', () => {
+  it('should work with classes', () => {})
+
+  it('should work with objects', () => {})
+
+  it('should work with a mix of objects and classes', () => {})
+})