!101 add statfs js api mock

Merge pull request !101 from shuzhouhao/OpenHarmony-3.1-Beta

runtime/main/extend/systemplugin/napi/index.js

@@ -34,6 +34,7 @@ import { mockWifi } from './wifi'
 import { mockSettings } from './settings'
 import { mockUri } from './uri'
 import { mockXml } from './xml'
+import { mockStatfs } from './statfs'
 
 export function mockRequireNapiFun() {
   global.requireNapi = function (...args) {
@@ -110,6 +111,8 @@ export function mockRequireNapiFun() {
         return mockUri();
       case "xml":
         return mockXml();
+      case "statfs":
+        return mockStatfs();
       default:
         return global.requireNapiPreview(...args);
     }

runtime/main/extend/systemplugin/napi/statfs.js

@@ -0,0 +1,31 @@
+import { paramMock } from "../utils"
+
+export function mockStatfs() {
+  const statfs = {
+    getFreeBytes: function (...args) {
+      console.warn("statfs.getFreeBytes interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramNumberMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve(paramMock.paramNumberMock);
+        })
+      }
+    },
+    getTotalBytes: function (...args) {
+      console.warn("statfs.getTotalBytes interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramNumberMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve(paramMock.paramNumberMock);
+        })
+      }
+    },
+  }
+  return statfs;
+}