snapshotEnvironment

Type: string

Path to a custom snapshot environment implementation. This is useful if you are running your tests in an environment that doesn't support Node.js APIs. This option doesn't have any effect on a browser runner.

This object should have the shape of SnapshotEnvironment and is used to resolve and read/write snapshot files:

export interface SnapshotEnvironment {
  getVersion: () => string
  getHeader: () => string
  resolvePath: (filepath: string) => Promise<string>
  resolveRawPath: (testPath: string, rawPath: string) => Promise<string>
  saveSnapshotFile: (filepath: string, snapshot: string) => Promise<void>
  readSnapshotFile: (filepath: string) => Promise<string | null>
  removeSnapshotFile: (filepath: string) => Promise<void>
}

You can extend default VitestSnapshotEnvironment from vitest/snapshot entry point if you need to overwrite only a part of the API.

WARNING

This is a low-level option and should be used only for advanced cases where you don't have access to default Node.js APIs.

If you just need to configure snapshots feature, use snapshotFormat or resolveSnapshotPath options.

snapshotEnvironment ​

snapshotEnvironment