Angular 测试以角度返回FormGroup的函数时出错

我的服务文件中有以下功能。它返回一个FormGroup，我们需要在多个位置动态返回该FormGroup，因此将其放入服务中

createBaseForm（）{
返回此.fb.group({
标题：[''[Validators.required，Validators.maxLength（200）]，
说明：[
'',
[
需要验证器，
验证程序.最大长度（2000），
这个.whitespaceValidator，
],
],
});
}

我为这个函数编写的测试如下。我只是调用该函数并将其与预期结果匹配，但它失败了

it（'createBaseForm'，（）=>{
const服务：CompareService=TestBed.get（CompareService）；
const baseform=新表单组({
标题：新表单控件([
'',
[Validators.required，Validators.maxLength（200）]，
]),
描述：新表单控件([
'',
[
需要验证器，
验证程序.最大长度（2000），
这个.whitespaceValidator，
],
]),
});
expect（service.createBaseForm（））.toEqual（baseform）；
});

我得到以下错误

 CompareService createBaseForm FAILED
        Error: Expected $._onCollectionChange = Function to equal Function.
        Expected $.controls.title.validator = Function to equal null.
        Expected $.controls.title._onCollectionChange = Function to equal Function.
        Expected $.controls.title._pendingValue = '' to equal [ '', [ Function, Function ] ].
        Expected $.controls.title.value = '' to equal [ '', [ Function, Function ] ].
        Expected $.controls.title.status = 'INVALID' to equal 'VALID'.
        Expected $.controls.title.errors = Object({ required: true }) to equal null.
        Expected $.controls.description.validator = Function to equal null.
        Expected $.controls.description._onCollectionChange = Function to equal Function.
        Expected $.controls.description._pendingValue = '' to equal [ '', [ Function, Function, undefined ] ].
        Expected $.controls.description.value = '' to equal [ '', [ Function, Function, undefined ] ].
        Expected $.controls.description.status = 'INVALID' to equal 'VALID'.
        Expected $.controls.description.errors = Object({ required: true, whitespace: true }) to equal null.
        Expected $.status = 'INVALID' to equal 'VALID'.
        Expected $.value.title = '' to equal [ '', [ Function, Function ] ].
        Expected $.value.description = '' to equal [ '', [ Function, Function, undefined ] ].

我不知道如何继续进行。我是否应该测试每个表单字段以检查其是否有效？有人能帮忙吗