Barcode

class Barcode {
  private value: string;
 
  constructor(value: string) {
    if (!this.isValidBarcode(value)) {
      throw new Error("Invalid barcode value. Please provide a valid barcode.");
    }
    this.value = value;
  }
 
  equals(other: Barcode): boolean {
    return this.value === other.value;
  }
 
  toString(): string {
    return this.value;
  }
 
  private isValidBarcode(value: string): boolean {
    // You can implement your barcode validation logic here.
    // For simplicity, we're not checking the barcode format in this example.
    // In a real application, you might use a specific pattern or library to validate barcodes.
    return true;
  }
}
 
// Example usage
const barcode1 = new Barcode("1234567890");
const barcode2 = new Barcode("1234567890");
console.log(barcode1.equals(barcode2)); // true
console.log(barcode1.toString()); // 1234567890

import { Barcode } from "./Barcode"; // Adjust the import path as per your project structure
 
describe("Barcode", () => {
  describe("constructor", () => {
    it("should create a Barcode instance with a valid barcode value", () => {
      const barcode = new Barcode("1234567890");
      expect(barcode).toBeDefined();
    });
 
    it("should throw an error for an invalid barcode value", () => {
      expect(() => new Barcode("invalid_barcode")).toThrow();
    });
  });
 
  describe("equals", () => {
    it("should return true when comparing two Barcode instances with the same barcode value", () => {
      const barcode1 = new Barcode("1234567890");
      const barcode2 = new Barcode("1234567890");
      expect(barcode1.equals(barcode2)).toBe(true);
    });
 
    it("should return false when comparing two Barcode instances with different barcode values", () => {
      const barcode1 = new Barcode("1234567890");
      const barcode2 = new Barcode("0987654321");
      expect(barcode1.equals(barcode2)).toBe(false);
    });
  });
 
  describe("toString", () => {
    it("should return the string representation of the Barcode", () => {
      const barcode = new Barcode("1234567890");
      expect(barcode.toString()).toBe("1234567890");
    });
  });
});