add proxy and test

tests/unit/example.spec.js

@@ -1,4 +1,4 @@
-import { expect } from 'chai'
+/* import { expect } from 'chai'
 import { shallowMount } from '@vue/test-utils'
 import HelloWorld from '@/components/HelloWorld.vue'
 
@@ -11,3 +11,29 @@ describe('HelloWorld.vue', () => {
     expect(wrapper.text()).to.include(msg)
   })
 })
+ */
+import { expect } from 'chai'
+import initSqlJs from 'sql.js'
+import db from '@/dataBase.js'
+
+describe('dataBase.js', () => {
+  it('creates schema', () => {
+    const config = {
+      locateFile: filename => `js/sql-wasm.wasm`
+    }
+    return initSqlJs(config)
+    .then(SQL => {
+      const dataBase = new SQL.Database()
+      dataBase.run("CREATE TABLE test (col1, col2);")
+
+      const data = dataBase.export()
+      const buffer = new Blob([data])
+      return db.loadDb(buffer)
+    })
+    .then(schema => {
+      expect(schema.length).to.equal(1)
+      expect(schema[0][0]).to.equal('test') 
+      expect(schema[0][1]).to.equal('CREATE TABLE test (col1, col2)') 
+    })
+  })
+})