Function getReplRunOutput

test/parallel/test-repl-custom-eval-previews.js:15–34

(inputStr, replOptions)

// Processes some input in a REPL instance and returns a promise that
// resolves to the produced output (as a string).
function getReplRunOutput(inputStr, replOptions) {
  return new Promise((resolve) => {
    const { replServer, input, output } = startNewREPLServer({ prompt: testingReplPrompt, ...replOptions });

    output.accumulator = '';

    output.write = (chunk) => {
      output.accumulator += chunk;
      // The prompt appears after the input has been processed
      if (output.accumulator.includes(testingReplPrompt)) {
        replServer.close();
        resolve(output.accumulator);
      }
    };

    input.emit('data', inputStr);

    input.run(['']);
  });
}

describe('with previews', () => {
  it("doesn't show previews by default", async () => {