test: test for scheduler

jest.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+  preset: 'ts-jest',
+  coverageDirectory: 'coverage',
+  coverageReporters: ['html', 'lcov', 'text'],
+  collectCoverageFrom: ['packages/*/src/**/*.ts'],
+  moduleFileExtensions: ['ts', 'js', 'json'],
+  moduleNameMapper: {
+    '^@vue/(.*?)$': '<rootDir>/packages/$1/src'
+  },
+  rootDir: __dirname,
+  testMatch: ['<rootDir>/packages/**/__tests__/**/*spec.(t|j)s']
+}