是否可以在mocha的it（）函数中单独使用if-else语句？

Question

我最近从mocha开始，想知道我们是否可以使用if else语句进行条件测试。我希望能够在everit（）函数中使用条件，以便对响应该getprojection（）函数调用而接收到的Json数据置入断言。

我已经发布了一个代码作为示例，以说明我要实现的目标。任何帮助，将不胜感激。谢谢！

var assert = require('chai').assert;
var expect = require('chai').expect;
var should = require('chai').should();
// var projection = require('');
var projectionsTest = require('./getProjection')



    describe("Annual Tax Projection", function () {
        describe("Current Year Tax - #2018", function () {
            it("should return correct taxable Income", function (done) {
                projectionsTest.getProjection('params', 'params', function (projections) {
                    if (grossIncome <= deductions){
                        assert.deepEqual(projections[2018].taxableIncome, 0)
                    }else throw new Error("There is something wrong with tax calculation")
                    done(Error);
                });
            });
            it("should check federal tax is calculated correctly", function (done) {
                projectionsTest.getProjection('params', 'params', function (projections) {
                    if (taxableIncome === 0 || taxBracket ===10){
                        assert.deepEqual(projections[2018]. )
                    }else
                    done(Error);
                });
            });
        });
    })