本文整理汇总了TypeScript中@jupyterlab/coreutils/src.StateDB.fetch方法的典型用法代码示例。如果您正苦于以下问题：TypeScript StateDB.fetch方法的具体用法？TypeScript StateDB.fetch怎么用？TypeScript StateDB.fetch使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类@jupyterlab/coreutils/src.StateDB的用法示例。
在下文中一共展示了StateDB.fetch方法的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 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();
});示例2: it
it('should allow a merge data transformation', async () => {
let transform = new PromiseDelegate<StateDB.DataTransform>();
let db = new StateDB({ namespace: 'test', transform: transform.promise });
let prepopulate = new StateDB({ namespace: 'test' });
let key = 'baz';
let value = 'qux';
// By sharing a namespace, the two databases will share data.
await prepopulate.save('foo', 'bar');
transform.resolve({ type: 'merge', contents: { [key]: value } });
let saved = await db.fetch('foo');
expect(saved).to.equal('bar');
saved = await db.fetch(key);
expect(saved).to.equal(value);
await db.clear();
});