conditional/lib/test/not_null_test.js

A preconditions package based on Google's Preconditions library

(function() {
  var IllegalValueError, checkNotNull, checkNull;

  require('./helpers/test_helper');

  checkNull = preconditions.checkNull, checkNotNull = preconditions.checkNotNull, IllegalValueError = preconditions.IllegalValueError;

  describe('not null precondition test', function() {
    it('undefined is null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull({}.x, 'not expecting null');
      };
      assert.throws(wrapper, IllegalValueError, 'not expecting null');
      wrapper = function() {
        return checkNull({}.x, 'null expected');
      };
      return assert.doesNotThrow(wrapper);
    });
    it('empty string is not null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull('');
      };
      return assert.doesNotThrow(wrapper);
    });
    it('empty array is not null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull([]);
      };
      return assert.doesNotThrow(wrapper);
    });
    it('empty object is not null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull({});
      };
      return assert.doesNotThrow(wrapper);
    });
    it('boolean is not null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull(false);
      };
      assert.doesNotThrow(wrapper);
      wrapper = function() {
        return checkNull(true);
      };
      return assert.throws(wrapper, IllegalValueError, "'true' is not null");
    });
    return it('0 (zero) is not null', function() {
      var wrapper;
      wrapper = function() {
        return checkNotNull(0);
      };
      assert.doesNotThrow(wrapper);
      wrapper = function() {
        return checkNull(0);
      };
      return assert.throws(wrapper, IllegalValueError, "'0' is not null");
    });
  });

}).call(this);