import grade from '../source/grade';
import { canonical } from '../source/gradation';
describe('grade', function () {
  it('should return nothing if no time units are applicable', function () {
    expect(grade(0, null, ['femtosecond'], canonical)).to.be.undefined;
  });
  it('should throw if a non-first step does not have a threshold', function () {
    expect(grade(2, null, ['second'], [{
      unit: 'second'
    }])).to.deep.equal({
      unit: 'second'
    });
    expect(function () {
      grade(2, null, ['second', 'minute'], [{
        unit: 'second'
      }, {
        unit: 'minute'
      }]);
    }).to.throw('Each step of a gradation must have a threshold defined except for the first one. Got "undefined", undefined. Step: {"unit":"minute"}');
  });
  it('should fall back to previous grading scale step if granularity is too high', function () {
    var gradation = canonical.slice();
    gradation[1].unit.should.equal('second');
    gradation[1].granularity = 3;
    grade(1.49, null, ['now', 'second'], gradation).unit.should.equal('now'); // And if there's no previous step, then use the current one.

    gradation.splice(0, 1);
    grade(1.49, null, ['now', 'second'], gradation).unit.should.equal('second');
  });
});
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