Function spawn

vscode-ng-language-service/syntaxes/test/driver.ts:28–37

Wraps node's spawn in a Promise.

(...args: Parameters<typeof cp.spawn>)

/** Wraps node's spawn in a Promise. */
function spawn(...args: Parameters<typeof cp.spawn>): Promise<number> {
  const child = cp.spawn(...args);

  return new Promise((resolve, reject) => {
    child.on('exit', (code: number) => {
      if (code === 0) resolve(0);
      else reject(code);
    });
  });
}

async function snapshotTest({scopeName, grammarFiles, testFile}: TestCase): Promise<number> {
  grammarFiles.push(...DUMMY_GRAMMARS);