### Install and build with pnpm

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/CONTRIBUTING.md

Run these commands to install dependencies and build the project. Requires pnpm to be installed.

```sh
pnpm i
pnpm build
```

--------------------------------

### Polyfill structuredClone with core-js

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Install core-js and import the polyfill before fake-indexeddb to resolve structuredClone issues in environments like jsdom.

```js
import "core-js/stable/structured-clone";
import "fake-indexeddb/auto";
```

--------------------------------

### Install fake-indexeddb via npm

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Use this command to add fake-indexeddb as a development dependency to your project.

```sh
npm install --save-dev fake-indexeddb
```

--------------------------------

### Use fake-indexeddb with Dexie via auto-import

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Importing the auto-setup script before Dexie allows Dexie to use the fake-indexeddb implementation globally.

```js
import "fake-indexeddb/auto";
import Dexie from "dexie";

const db = new Dexie("MyDatabase");
```

--------------------------------

### Polyfill old environments with core-js

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Import core-js before fake-indexeddb to provide necessary polyfills for legacy environments like PhantomJS.

```js
import "core-js/stable";
import "fake-indexeddb/auto";
```

--------------------------------

### Configure Jest setupFiles

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Add fake-indexeddb/auto to the setupFiles array in your Jest configuration to enable it for all tests.

```json
{
    "setupFiles": [
        "fake-indexeddb/auto"
    ]
}
```

--------------------------------

### Run all WPT tests

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Executes the full suite of Web Platform Tests using pnpm.

```sh
pnpm run test-w3c
```

--------------------------------

### Lint and test commands

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/CONTRIBUTING.md

Run linting and various test suites. The commands include running all tests, W3C tests, and Mocha tests.

```sh
pnpm run lint
pnpm test # run all the tests
pnpm run test-w3c # run just the W3C tests
pnpm run test-mocha # run just the Mocha tests
```

--------------------------------

### Run conversion script

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Executes the conversion script to process the updated tests.

```sh
node src/test/web-platform-tests/convert.js
```

--------------------------------

### Use fake-indexeddb with auto-import

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Importing fake-indexeddb/auto populates the global scope with IndexedDB variables, allowing standard IndexedDB usage.

```js
import "fake-indexeddb/auto";

var request = indexedDB.open("test", 3);
request.onupgradeneeded = function () {
    var db = request.result;
    var store = db.createObjectStore("books", {keyPath: "isbn"});
    store.createIndex("by_title", "title", {unique: true});

    store.put({title: "Quarry Memories", author: "Fred", isbn: 123456});
    store.put({title: "Water Buffaloes", author: "Fred", isbn: 234567});
    store.put({title: "Bedrock Nights", author: "Barney", isbn: 345678});
}
request.onsuccess = function (event) {
    var db = event.target.result;

    var tx = db.transaction("books");

    tx.objectStore("books").index("by_title").get("Quarry Memories").addEventListener("success", function (event) {
        console.log("From index:", event.target.result);
    });
    tx.objectStore("books").openCursor(IDBKeyRange.lowerBound(200000)).onsuccess = function (event) {
        var cursor = event.target.result;
        if (cursor) {
            console.log("From cursor:", cursor.value);
            cursor.continue();
        }
    };
    tx.oncomplete = function () {
        console.log("All done!");
    };
};
```

--------------------------------

### Release version command

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/CONTRIBUTING.md

Run pnpm version (e.g., pnpm version patch) to trigger the update-wpt-results script, which updates browser WPT results and fake-indexeddb's results in the README.

```sh
pnpm version patch
```

--------------------------------

### Update IDL files

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Copies necessary IDL files from the WPT repository to the local idlharness directory.

```sh
cp path/to/wpt/interfaces/{IndexedDB,html,dom}.idl \
  path/to/fakeIndexedDB/src/test/web-platform-tests/idlharness
```

--------------------------------

### Run a subset of WPT tests

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Runs specific tests by matching a name pattern using the Node.js test runner.

```sh
node --test --test-name-pattern="name of test" \
    ./src/test/web-platform-tests/run-all.js
```

--------------------------------

### Update all manifest files

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Regenerates test expectation manifests based on current test results.

```sh
GENERATE_MANIFESTS=1 pnpm run test-w3c
```

--------------------------------

### Explicitly import IndexedDB variables

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Import specific IndexedDB classes directly from the package instead of modifying the global scope.

```js
import {
    indexedDB,
    IDBCursor,
    IDBCursorWithValue,
    IDBDatabase,
    IDBFactory,
    IDBIndex,
    IDBKeyRange,
    IDBObjectStore,
    IDBOpenDBRequest,
    IDBRequest,
    IDBTransaction,
    IDBVersionChangeEvent,
} from "fake-indexeddb";

// The rest is the same as above.
```

--------------------------------

### Simulate close event with forceCloseDatabase

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Use the non-standard forceCloseDatabase function to trigger a close event on an IDBDatabase instance for testing purposes.

```js
import { forceCloseDatabase } from "fake-indexeddb";

db.addEventListener("close", () => {
    console.log("Forcibly closed!");
});
forceCloseDatabase(db); // invokes the event listener
```

--------------------------------

### Reset IndexedDB state

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Create a new instance of IDBFactory to obtain a fresh IndexedDB state for test isolation.

```js
import "fake-indexeddb/auto";
import { IDBFactory } from "fake-indexeddb";

// Whenever you want a fresh indexedDB
indexedDB = new IDBFactory();
```

--------------------------------

### Use fake-indexeddb with Dexie via explicit injection

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Pass the fake-indexeddb objects directly to the Dexie constructor to avoid modifying the global scope.

```js
import Dexie from "dexie";
import { indexedDB, IDBKeyRange } from "fake-indexeddb";

const db = new Dexie("MyDatabase", { indexedDB: indexedDB, IDBKeyRange: IDBKeyRange });
```

--------------------------------

### Fix jsdom environment for Jest

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Create a custom JSDOM environment to inject the Node.js structuredClone implementation and configure it in jest.config.js.

```ts
// FixJSDOMEnvironment.ts

import JSDOMEnvironment from 'jest-environment-jsdom';

// https://github.com/facebook/jest/blob/v29.4.3/website/versioned_docs/version-29.4/Configuration.md#testenvironment-string
export default class FixJSDOMEnvironment extends JSDOMEnvironment {
  constructor(...args: ConstructorParameters<typeof JSDOMEnvironment>) {
    super(...args);

    // FIXME https://github.com/jsdom/jsdom/issues/3363
    this.global.structuredClone = structuredClone;
  }
}
```

```js
// jest.config.js

/** @type {import('jest').Config} */
const config = {
  testEnvironment: './FixJSDOMEnvironment.ts',
};

module.exports = config;
```

--------------------------------

### Update IndexedDB test files

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/src/test/web-platform-tests/README.md

Removes existing tests and copies the latest IndexedDB tests from the WPT repository.

```sh
rm -fr path/to/fakeIndexedDB/src/test/web-platform-tests/IndexedDB
cp -R path/to/wpt/IndexedDB path/to/fakeIndexedDB/src/test/web-platform-tests/IndexedDB
rm -fr path/to/fakeIndexedDB/src/test/web-platform-tests/converted
```

--------------------------------

### Rename imported IndexedDB variables

Source: https://github.com/dumbmatter/fakeindexeddb/blob/master/README.md

Rename imports to avoid conflicts with built-in IndexedDB variables.

```js
import {
    indexedDB as fakeIndexedDB,
} from "fake-indexeddb";
```

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