本文整理汇总了TypeScript中@jupyterlab/coreutils/src.StateDB类的典型用法代码示例。如果您正苦于以下问题：TypeScript StateDB类的具体用法？TypeScript StateDB怎么用？TypeScript StateDB使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了StateDB类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: it
it('should resolve a nonexistent key fetch with undefined', async () => {
let { localStorage } = window;
let db = new StateDB({ namespace: 'test-namespace' });
let key = 'foo:bar';
expect(localStorage.length).to.equal(0);
const fetched = await db.fetch(key);
expect(fetched).to.be.undefined;
});示例2: it
it('should allow an overwrite data transformation', async () => {
const transform = new PromiseDelegate<StateDB.DataTransform>();
const db = new StateDB({
namespace: 'test',
transform: transform.promise
});
const prepopulate = new StateDB({ namespace: 'test' });
const key = 'foo';
const correct = 'bar';
const incorrect = 'baz';
const transformation: StateDB.DataTransform = {
type: 'overwrite',
contents: { [key]: correct }
};
// By sharing a namespace, the two databases will share data.
await prepopulate.save(key, incorrect);
let value = await prepopulate.fetch(key);
expect(value).to.equal(incorrect);
transform.resolve(transformation);
await transform.promise;
value = await db.fetch(key);
expect(value).to.equal(correct);
await db.clear();
});