/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Test the basic functionality of async-storage.
// Adapted from https://github.com/mozilla-b2g/gaia/blob/f09993563fb5fec4393eb71816ce76cb00463190/apps/sharedtest/test/unit/async_storage_test.js.

const asyncStorage = require("devtools/toolkit/shared/async-storage");
add_task(function*() {
  is(typeof asyncStorage.length, 'function', "API exists.");
  is(typeof asyncStorage.key, 'function', "API exists.");
  is(typeof asyncStorage.getItem, 'function', "API exists.");
  is(typeof asyncStorage.setItem, 'function', "API exists.");
  is(typeof asyncStorage.removeItem, 'function', "API exists.");
  is(typeof asyncStorage.clear, 'function', "API exists.");
});

add_task(function*() {
  yield asyncStorage.setItem('foo', 'bar');
  let value = yield asyncStorage.getItem('foo');
  is(value, 'bar', 'value is correct');
  yield asyncStorage.setItem('foo', 'overwritten');
  value = yield asyncStorage.getItem('foo');
  is(value, 'overwritten', 'value is correct');
  yield asyncStorage.removeItem('foo');
  value = yield asyncStorage.getItem('foo');
  is(value, null, 'value is correct');
});

add_task(function*() {
  var object = {
    x: 1,
    y: 'foo',
    z: true
  };

  yield asyncStorage.setItem('myobj', object);
  let value = yield asyncStorage.getItem('myobj');
  is(object.x, value.x, 'value is correct');
  is(object.y, value.y, 'value is correct');
  is(object.z, value.z, 'value is correct');
  yield asyncStorage.removeItem('myobj');
  value = yield asyncStorage.getItem('myobj');
  is(value, null, 'value is correct');
});

add_task(function*() {
  yield asyncStorage.clear();
  let len = yield asyncStorage.length();
  is(len, 0, 'length is correct');
  yield asyncStorage.setItem('key1', 'value1');
  len = yield asyncStorage.length();
  is(len, 1, 'length is correct');
  yield asyncStorage.setItem('key2', 'value2');
  len = yield asyncStorage.length();
  is(len, 2, 'length is correct');
  yield asyncStorage.setItem('key3', 'value3');
  len = yield asyncStorage.length();
  is(len, 3, 'length is correct');

  let key = yield asyncStorage.key(0);
  is(key, 'key1', 'key is correct');
  key = yield asyncStorage.key(1);
  is(key, 'key2', 'key is correct');
  key = yield asyncStorage.key(2);
  is(key, 'key3', 'key is correct');
  key = yield asyncStorage.key(3);
  is(key, null, 'key is correct');
  yield asyncStorage.clear();
  key = yield asyncStorage.key(0);
  is(key, null, 'key is correct');

  len = yield asyncStorage.length();
  is(len, 0, 'length is correct');
});
