Update IJupyterKernelSpec to reflect that language may be undefined (microsoft#14421)

Author: joyceerhl

src/client/datascience/jupyter/kernels/kernelService.ts

@@ -111,7 +111,7 @@ export class KernelService {
  const specs = await this.getKernelSpecs(sessionManager, cancelToken);
  if (isInterpreter(option)) {
  return specs.find((item) => {
- if (item.language.toLowerCase() !== PYTHON_LANGUAGE.toLowerCase()) {
+ if (item.language?.toLowerCase() !== PYTHON_LANGUAGE.toLowerCase()) {
  return false;
  }
  return (

src/client/datascience/kernel-launcher/kernelFinder.ts

@@ -144,7 +144,7 @@ export class KernelFinder implements IKernelFinder {
 
  private async findKernelSpecBasedOnLanguage(resource: Resource, language: string) {
  const specs = await this.listKernelSpecs(resource);
- return specs.find((item) => item.language.toLowerCase() === language.toLowerCase());
+ return specs.find((item) => item.language?.toLowerCase() === language.toLowerCase());
  }
 
  private async findResourceKernelSpecs(resource: Resource): Promise<IJupyterKernelSpec[]> {

src/client/datascience/types.ts

@@ -412,9 +412,9 @@ export interface IJupyterKernelSpec {
  */
  id?: string;
  name: string;
- language: string;
+ language?: string;
  path: string;
- env: NodeJS.ProcessEnv | undefined;
+ env?: NodeJS.ProcessEnv | undefined;
  /**
  * Kernel display name.
  *

src/test/datascience/notebook/helper.ts

@@ -197,7 +197,7 @@ export async function waitForKernelToGetAutoSelected(expectedLanguage?: string)
  if (vscodeNotebook.activeNotebookEditor.kernel instanceof VSCodeNotebookKernelMetadata) {
  if (vscodeNotebook.activeNotebookEditor.kernel.selection.kind === 'startUsingKernelSpec') {
  return (
- vscodeNotebook.activeNotebookEditor.kernel.selection.kernelSpec.language.toLowerCase() ===
+ vscodeNotebook.activeNotebookEditor.kernel.selection.kernelSpec.language?.toLowerCase() ===
  expectedLanguage.toLowerCase()
  );
  }