Typescript file reading in the wrong variable type

In my spec.ts file it reads this error "Argument of type 'string' is not assignable to parameter of type 'number'." for the value unitPrice, which doesn't make sense because in my .ts file unitPrice is the type number. These properties are supposed to store the values coming from my api made using springboot and unitPrice is assigned as BigDecimal in my api. So I don't know where it's getting that unitPrice is an "Argument of type 'string'".

This is my .spec.ts file:

import { Product } from './product';

describe('Product', () => {
  it('should create an instance', () => {
    expect(new Product('sku', 'name', 'description', 'unitPrice', 'imageUrl', 'active', 'unitsInStock', 'dateCreated', 'lastUpdated')).toBeTruthy();
  });
});

This is my .ts file

export class Product {
    constructor(public sku: string,
                public name: string,
                public description: string,
                public unitPrice: number,
                public imageUrl: string,
                public active: boolean,
                public unitsInStock: number,
                public dateCreated: Date,
                public lastUpdated: Date
    ) {
        
    }
}

This is a snippet of my json from the api

"_embedded" : {
    "products" : [ {
      "sku" : "BOOK-TECH-1000",
      "name" : "JavaScript - The Fun Parts",
      "description" : "Learn JavaScript",
      "price" : 19.99,
      "imageUrl" : "assets/images/products/placeholder.png",
      "active" : true,
      "unitsInStock" : 100,
      "dateCreated" : "2024-12-19T14:44:23.000+00:00",
      "lastUpdated" : null,
      "_links" : {
        "self" : {
          "href" : "http://localhost:8080/api/products/1"
        },
        "product" : {
          "href" : "http://localhost:8080/api/products/1"
        },
        "category" : {
          "href" : "http://localhost:8080/api/products/1/category"
        }
      }
    }

If the unitPrice is of type number, just pass a number value (1) instead of a string ('unitPrice').

Same logic to be applied for active, dateCreated and lastUpdated.

import { Product } from './product';

describe('Product', () => {
  it('should create an instance', () => {
    expect(new Product('sku', 'name', 'description', 1, 'imageUrl', true, 'unitsInStock', new Date(), new Date())).toBeTruthy();
  });
});