import { Hashpower } from './hashpower.vo';

describe('Hashpower', () => {
  describe('create', () => {
    it('should create Hashpower with value', () => {
      const hp = Hashpower.create(100);
      expect(hp.value).toBe(100);
    });
  });

  describe('zero', () => {
    it('should create zero Hashpower', () => {
      const hp = Hashpower.zero();
      expect(hp.value).toBe(0);
      expect(hp.isZero()).toBe(true);
    });
  });

  describe('fromTreeCount', () => {
    it('should calculate hashpower from tree count and percent', () => {
      // 10 trees at 2% = 20 hashpower
      const hp = Hashpower.fromTreeCount(10, 2);
      expect(hp.value).toBe(20);
    });

    it('should return zero for zero percent', () => {
      const hp = Hashpower.fromTreeCount(10, 0);
      expect(hp.value).toBe(0);
    });
  });

  describe('validation', () => {
    it('should throw error for negative value', () => {
      expect(() => Hashpower.create(-10)).toThrow('算力不能为负数');
    });
  });

  describe('add', () => {
    it('should add two Hashpower values', () => {
      const a = Hashpower.create(100);
      const b = Hashpower.create(50);
      const result = a.add(b);
      expect(result.value).toBe(150);
    });
  });

  describe('subtract', () => {
    it('should subtract Hashpower values', () => {
      const a = Hashpower.create(100);
      const b = Hashpower.create(30);
      const result = a.subtract(b);
      expect(result.value).toBe(70);
    });

    it('should return zero when subtracting larger value', () => {
      const a = Hashpower.create(50);
      const b = Hashpower.create(100);
      const result = a.subtract(b);
      expect(result.value).toBe(0);
    });
  });

  describe('equals', () => {
    it('should return true for equal values', () => {
      const a = Hashpower.create(100);
      const b = Hashpower.create(100);
      expect(a.equals(b)).toBe(true);
    });

    it('should return false for different values', () => {
      const a = Hashpower.create(100);
      const b = Hashpower.create(50);
      expect(a.equals(b)).toBe(false);
    });
  });
});