import { describe, it, expect, expectTypeOf } from 'vitest'import {  notebookEnvironmentApplicationCommandContracts,  parseNotebookLanguage,  parseOptionalNotebookLanguage,  type NotebookOutput,  type NotebookWorkingFile,  type NotebookWorkingFileKind,  type NotebookCell} from './notebook' describe('shared notebook types', () => {  it('advertises only the unclassified working-file kind emitted by the runtime', () => {    expectTypeOf<NotebookWorkingFileKind>().toEqualTypeOf<'other'>()    expectTypeOf<NotebookWorkingFile['kind']>().toEqualTypeOf<'other'>()  })   it('parses only python and r as NotebookLanguage', () => {    expect(parseNotebookLanguage('python')).toBe('python')    expect(parseNotebookLanguage('r')).toBe('r')    expect(parseOptionalNotebookLanguage(undefined)).toBeUndefined()    expect(parseOptionalNotebookLanguage(null)).toBeUndefined()    expect(() => parseNotebookLanguage('julia')).toThrow(/python or r/i)    expect(() => parseNotebookLanguage('R')).toThrow(/python or r/i)    expect(() => parseNotebookLanguage(null)).toThrow(/python or r/i)    expect(() => parseOptionalNotebookLanguage('julia')).toThrow(/python or r/i)  })   it('rejects an unknown Environment command language before the owner runs', () => {    expect(notebookEnvironmentApplicationCommandContracts.provision.args.parse(['python'])).toEqual(      ['python']    )    expect(      notebookEnvironmentApplicationCommandContracts.provision.args.parse(['r', 'op-1'])    ).toEqual(['r', 'op-1'])    expect(notebookEnvironmentApplicationCommandContracts.cancel.args.parse([])).toEqual([])    expect(notebookEnvironmentApplicationCommandContracts.cancel.args.parse(['python'])).toEqual([      'python'    ])    expect(notebookEnvironmentApplicationCommandContracts.cancel.args.parse([null])).toEqual([])    expect(      notebookEnvironmentApplicationCommandContracts.provision.args.parse(['python', null])    ).toEqual(['python'])    expect(      notebookEnvironmentApplicationCommandContracts.repair.args.parse(['r', 'default-r', null])    ).toEqual(['r', 'default-r'])    expect(      notebookEnvironmentApplicationCommandContracts.repair.args.parse([        'python',        '/runtime/default-python/python',        'repair-1'      ])    ).toEqual(['python', '/runtime/default-python/python', 'repair-1'])    expect(() =>      notebookEnvironmentApplicationCommandContracts.repair.args.parse(['python', ''])    ).toThrow()    expect(() =>      notebookEnvironmentApplicationCommandContracts.provision.args.parse([null])    ).toThrow()    expect(() =>      notebookEnvironmentApplicationCommandContracts.provision.args.parse(['julia'])    ).toThrow()    expect(() =>      notebookEnvironmentApplicationCommandContracts.repair.args.parse(['julia'])    ).toThrow()    expect(() =>      notebookEnvironmentApplicationCommandContracts.cancel.args.parse(['julia'])    ).toThrow()  })   it('NotebookOutput supports a display (mime bundle) variant', () => {    const output: NotebookOutput = {      type: 'display',      data: { 'text/plain': '42', 'image/png': 'iVBORw0KGgo=' }    }    expect(output.type).toBe('display')    // data is a string→string mime bundle    expect(output.data['text/plain']).toBe('42')  })   it('NotebookCell.language is a NotebookLanguage', () => {    const cell: NotebookCell = { id: 'c1', language: 'r', code: '1+1', status: 'idle' }    expect(cell.language).toBe('r')  })})