Method updateSnapshot

packages/vitest/src/node/core.ts:1299–1314

* Update snapshots in specified files. If no files are provided, it will update files with failed tests and obsolete snapshots. * @param files The list of files on the file system

(files?: string[])

   * @param files The list of files on the file system
   */
  async updateSnapshot(files?: string[]): Promise<TestRunResult> {
    // default to failed files
    files = files || [
      ...this.state.getFailedFilepaths(),
      ...this.snapshot.summary.uncheckedKeysByFile.map(s => s.filePath),
    ]

    this.enableSnapshotUpdate()

    try {
      return await this.rerunFiles(files, 'update snapshot', false)
    }
    finally {
      this.resetSnapshotUpdate()
    }
  }

  /**
   * Enable the mode that allows updating snapshots when running tests.