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@this-dot/cypress-indexeddb
Advanced tools
A Cypress.io helper library for reading and manipulating data inside IndexedDB
Cypress IndexedDB helpers are a set of custom cypress commands that helps you handle indexedDB related operations in your Cypress tests.
It supports:
✅ Creating new IndexedDB databases and Object Stores
✅ Making CRUD operations on the above-mentioned stores
✅ Read data out of indexedDB and assert the results
Install the package:
npm install @this-dot/cypress-indexeddb
or
yarn install @this-dot/cypress-indexeddb
Import the plugin in your cypress/support/commands.js
or cypress/support/commands.ts
file:
import '@this-dot/cypress-indexeddb';
If you use typescript, set up typings in the same support
folder
cypress-indexeddb-namespace.ts
filedeclare namespace Cypress {
interface Chainable<Subject> {
clearIndexedDb(databaseName: string): void;
openIndexedDb(databaseName: string, version?: number): Chainable<IDBDatabase>;
createObjectStore(storeName: string): Chainable<IDBObjectStore>;
getStore(storeName: string): Chainable<IDBObjectStore>;
createItem(key: string, value: unknown): Chainable<IDBObjectStore>;
readItem<T = unknown>(key: IDBValidKey | IDBKeyRange): Chainable<T>;
updateItem(key: string, value: unknown): Chainable<IDBObjectStore>;
deleteItem(key: string): Chainable<IDBObjectStore>;
}
}
In order to make your tests reliable, before every test it is recommended to clear the existing database. You can do it by using the cy.clearIndexedDb('databaseName')
command.
beforeEach(() => {
cy.clearIndexedDb('EXAMPLE_DATABASE');
// ...
cy.visit('/');
});
In order to create an object store, first, you need to initiate a database connection by calling the cy.openIndexedDb('databaseName')
command and use the as
chainer to store it with an alias.
cy.openIndexedDb('EXAMPLE_DATABASE').as('database');
The openIndexedDb
command supports providing a database version number optionally
cy.openIndexedDb('EXAMPLE_DATABASE', 12) // initiate with database version 12
.as('database');
You can access the aliased database with the getIndexedDb('@yourAlias')
command.
You can chain off the createObjectStore('storeName')
method from methods that yield an IDBDatabase
instance (openIndexedDb
or getIndexedDb
). You can use the as
chainer to save the store using an alias.
cy.getIndexedDb('@database').createObjectStore('example_store').as('exampleStore');
You can retrieve the saved object store using the cy.getStore('@exampleStore')
;
You can chain off CRUD operation methods from methods that yield an IDBObjectStore
instance (createObjectStore
or getStore
).
The createItem
, updateItem
and the deleteItem
methods yield the store, therefore, you can chain these methods to save multiple entries into the target Object Store.
cy.getStore('@exampleStore')
.createItem('example', { test: 'test' }) // creates the 'example' key and saves the second parameter as the value.
.updateItem('example', { test: 'replace' }) // updates the 'example' key's value with the second parameter.
.deleteItem('example') // deletes the 'example' key
.createItem('example2', ['testValue', 'testValue2'])
.createItem('example3', { exampleKey: 1337 });
The readItem
method yields the value of the provided key, or undefined if it does not exist. You can chain assertions from this method. If you use TypeScript, you can set the type of the returned value.
cy.getStore('@exampleStore').readItem<string[]>('example2').should('have.length', 2);
cy.getStore('@exampleStore')
.readItem<number>('example3')
.should('have.property', 'exampleKey', 1337);
Feel free to check our cypress tests in our git repository for some examples.
FAQs
A Cypress.io helper library for reading and manipulating data inside IndexedDB
The npm package @this-dot/cypress-indexeddb receives a total of 2,783 weekly downloads. As such, @this-dot/cypress-indexeddb popularity was classified as popular.
We found that @this-dot/cypress-indexeddb demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 6 open source maintainers collaborating on the project.
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