index.js 1.0 KB

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  1. 'use strict';
  2. var test = require('tape');
  3. var getProto = require('get-proto');
  4. var semver = require('semver');
  5. var getAsyncFunction = require('../');
  6. test('getAsyncFunction', function (t) {
  7. var result = getAsyncFunction();
  8. /* eslint-env browser */
  9. if (typeof window === 'undefined' && typeof process !== 'undefined') {
  10. t.equal(
  11. !!result,
  12. semver.satisfies(process.version, '>= 7.6'),
  13. 'result is present or absent as expected for node ' + process.version
  14. );
  15. }
  16. t.test('exists', { skip: !result }, function (st) {
  17. if (result && getProto) { // TS can't infer `skip`, or that getProto definitely exists if AsyncFunction exists
  18. st.equal(typeof result, 'function', 'is a function');
  19. st.equal(getProto(result), Function, 'extends Function');
  20. return result('a', 'return a')(42).then(function (a) {
  21. st.equal(a, 42, 'returns an async function');
  22. });
  23. }
  24. return st.fail('should never get here');
  25. });
  26. t.test('does not exist', { skip: !!result }, function (st) {
  27. st.equal(result, false, 'is false');
  28. st.end();
  29. });
  30. t.end();
  31. });