Angular 2单元测试

Question

我正在尝试使用jasmine在Angular 2中对服务进行单元测试，并且需要在Response Options类的body参数中添加一个JSON数据数组，我尝试了各种方法，但都失败了，请参阅下面的代码片段：

it('returns a list of employees with correct first-employee data', done => {
        //Arrange
        mockBackend.connections.subscribe((c: any) => {
            let response = new ResponseOptions({
                body: `[
                            {
                                travelReasonId:1,
                                name:'Operator visit'
                            },
                            {
                                travelReasonId:2,
                                name:'3rd Party visit'
                            },
                            {
                                travelReasonId:3,
                                name:'MGS visit'
                            }
                        ]`
            });
            c.mockRespond(new Response(response));
        });
        // Act   
        let result: any;
        travelReasonService.getAllTravelReasons()
            .subscribe((_result) => { result = _result; });
        // Assert
          let firstValue = {
            travelReasonId: 1,
            name: 'Operator visit'
         };
        console.log(result);
        expect(result[0]).toEqual(firstValue);
        expect(result.length).toEqual(3);
    });

测试结果表明: SyntaxError: JSON Parse error: Expected '}‘(第321行)当为有问题的代码运行测试时，如果有任何帮助，将不胜感激。

Answer 1

关于JB Nizet建议的我实现的解决方案，请参阅以下内容

 it('returns a list with two employees', done => {
        //Arrange
        let travelReasons: TravelReason[];
        travelReasons = [];
        let travelReason_1 = new TravelReason();
        let travelReason_2 = new TravelReason();
        travelReason_1.name = 'Operator visit';
        travelReason_1.travelReasonId = 1;
        travelReason_2.name = '3rd Party visit';
        travelReason_2.travelReasonId = 2;
        travelReasons.push(travelReason_1);
        travelReasons.push(travelReason_2);

        mockBackend.connections.subscribe((c: any) => {
            let response = new ResponseOptions({
                body: JSON.stringify(travelReasons)
            });
            c.mockRespond(new Response(response));
        });
        // Act           
        let result: any;
        travelReasonService.getAllTravelReasons()
            .subscribe((_result) => { result = _result; });

        // Assert
        let firstValue = {
            travelReasonId: 1,
            name: 'Operator visit'
        };

        let secondValue = {
            'travelReasonId': 2,
            'name': '3rd Party visit'
        };

        expect(result[0]).toEqual(firstValue);
        expect(result[1]).toEqual(secondValue);
        expect(result.length).toEqual(2);
        done();
    });