Function testCommandLineAPI

test/parallel/test-inspector.js:167–292

(session)

}

async function testCommandLineAPI(session) {
  const testModulePath = require.resolve('../fixtures/empty.js');
  const testModuleStr = JSON.stringify(testModulePath);
  const printAModulePath = require.resolve('../fixtures/printA.js');
  const printAModuleStr = JSON.stringify(printAModulePath);
  const printBModulePath = require.resolve('../fixtures/printB.js');
  const printBModuleStr = JSON.stringify(printBModulePath);

  // We can use `require` outside of a callframe with require in scope
  let result = await session.send(
    {
      'method': 'Runtime.evaluate', 'params': {
        'expression': 'typeof require("fs").readFile === "function"',
        'includeCommandLineAPI': true
      }
    });
  checkException(result);
  assert.strictEqual(result.result.value, true);

  // The global require has the same properties as a normal `require`
  result = await session.send(
    {
      'method': 'Runtime.evaluate', 'params': {
        'expression': [
          'typeof require.resolve === "function"',
          'typeof require.extensions === "object"',
          'typeof require.cache === "object"',
        ].join(' && '),
        'includeCommandLineAPI': true
      }
    });
  checkException(result);
  assert.strictEqual(result.result.value, true);
  // `require` twice returns the same value
  result = await session.send(
    {
      'method': 'Runtime.evaluate', 'params': {
        // 1. We require the same module twice
        // 2. We mutate the exports so we can compare it later on
        'expression': `
          Object.assign(
            require(${testModuleStr}),
            { old: 'yes' }
          ) === require(${testModuleStr})`,
        'includeCommandLineAPI': true
      }
    });
  checkException(result);
  assert.strictEqual(result.result.value, true);
  // After require the module appears in require.cache
  result = await session.send(
    {
      'method': 'Runtime.evaluate', 'params': {
        'expression': `JSON.stringify(
          require.cache[${testModuleStr}].exports
        )`,
        'includeCommandLineAPI': true
      }