fix data to string from buffer for output channel (#21821)

fix #21820

Author: eleanorjboyd

src/client/testing/testController/common/server.ts

@@ -213,10 +213,10 @@ export class PythonTestServer implements ITestServer, Disposable {
  // Take all output from the subprocess and add it to the test output channel. This will be the pytest output.
  // Displays output to user and ensure the subprocess doesn't run into buffer overflow.
  result?.proc?.stdout?.on('data', (data) => {
- spawnOptions?.outputChannel?.append(data);
+ spawnOptions?.outputChannel?.append(data.toString());
  });
  result?.proc?.stderr?.on('data', (data) => {
- spawnOptions?.outputChannel?.append(data);
+ spawnOptions?.outputChannel?.append(data.toString());
  });
  result?.proc?.on('exit', () => {
  traceLog('Exec server closed.', uuid);

src/client/testing/testController/pytest/pytestDiscoveryAdapter.ts

@@ -89,10 +89,10 @@ export class PytestTestDiscoveryAdapter implements ITestDiscoveryAdapter {
  // Take all output from the subprocess and add it to the test output channel. This will be the pytest output.
  // Displays output to user and ensure the subprocess doesn't run into buffer overflow.
  result?.proc?.stdout?.on('data', (data) => {
- spawnOptions.outputChannel?.append(data);
+ spawnOptions.outputChannel?.append(data.toString());
  });
  result?.proc?.stderr?.on('data', (data) => {
- spawnOptions.outputChannel?.append(data);
+ spawnOptions.outputChannel?.append(data.toString());
  });
  result?.proc?.on('exit', () => {
  deferredExec.resolve({ stdout: '', stderr: '' });

src/client/testing/testController/pytest/pytestExecutionAdapter.ts

@@ -169,10 +169,10 @@ export class PytestTestExecutionAdapter implements ITestExecutionAdapter {
  // Take all output from the subprocess and add it to the test output channel. This will be the pytest output.
  // Displays output to user and ensure the subprocess doesn't run into buffer overflow.
  result?.proc?.stdout?.on('data', (data) => {
- this.outputChannel?.append(data);
+ this.outputChannel?.append(data.toString());
  });
  result?.proc?.stderr?.on('data', (data) => {
- this.outputChannel?.append(data);
+ this.outputChannel?.append(data.toString());
  });
 
  result?.proc?.on('exit', () => {