How to use the exists function from should

client.test.js

GitHub: alibaba-archive/restful-client

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describe('RESTfulClient', function () {
  describe('request()', function () {
    it('should return status 200 results', function (done) {
      gitlab.projects.list(function (err, result) {
        should.not.exists(err);
        should.exists(result);
        result.length.should.above(1);
        result[0].should.have.property('id');
        lastId = result[result.length - 1].id;
        done();

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+ 53 other calls in file

emoji.js

GitHub: sottiz/solidity_tp

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  umbrella1.should.equal(umbrella2);
});

it("should work for flags", function() {
  var mexico = emoji.which('🇲🇽');
  should.exists(mexico);
  mexico.should.be.exactly('flag-mx');

  var marocco = emoji.which('🇲🇦');
  should.exists(marocco);

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+ 6 other calls in file