I am receiving a json response in an Angular 11 app and I have created an interface corresponding to that json object.The json object is
{
"division": {
"uid": "f5a10d90-60d6-4937-b917-1d809bd180b4",
"name": "Sales Division",
"title": "Sales",
"type": "Form",
"formFields": [
{
"id": 1,
"name": "firstName",
"label": "First Name",
"value": "John"
},
{
"id": 2,
"name": "lastName",
"label": "Last Name",
"value": "Smith"
}
]
}
}
The typescript interface I created for this json object is
export interface FormField {
id: number;
name: string;
label: string;
value: string;
}
export interface Division {
uid: string;
name: string;
title: string;
type: string;
formFields: FormField[];
}
export interface Division {
division: Division;
}
I am using a service division.sevice.ts to fetch the above json response from API and everything works fine. I am trying to write unit tests for the this service in the division.service.spec.ts file. I created a mockDivisionObj inside this file for testing purpose which is shown below.
mockDivisionObj = {
"division": {
"uid": "f5a10d90-60d6-4937-b917-1d809bd180b4",
"name": "Sales Division",
"title": "Sales",
"type": "Form",
"formFields": [
{
"id": 1,
"name": "firstName",
"label": "First Name",
"value": "John"
},
{
"id": 2,
"name": "lastName",
"label": "Last Name",
"value": "Smith"
}
]
}
}
An error is shown which says
Property 'division' is missing in type '{ uid: string; name: string; title: string; type:
string; formFields: { id: number; name: string; label: string; value: string; }[]; }' but
required in type 'Division'.
I think the way I created the interface may be wrong but I couldn't figure out what exactly is causing the issue. Please help me out with this.
I was able to fix the issue by changing the name of one of the interfaces in the file to 'AppDivision' as shown below.
export interface FormField {
id: number;
name: string;
label: string;
value: string;
}
export interface Division {
uid: string;
name: string;
title: string;
type: string;
formFields: FormField[];
}
export interface AppDivision {
division: Division;
}
The same name for two interfaces caused the error in the unit test mock object.
Your code is fine.To solve this error you can try the code below =>
this.division = this.mockDivisionObj.division as Division;
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