describe('Services - Hex Conversion', () => {
  let services: Services;

  beforeEach(() => {
    services = new Services();
  });

  describe('hexToBlob', () => {
    it('should convert hex string to blob correctly', () => {
      const hexString = '48656c6c6f20576f726c64'; // "Hello World" in hex
      const blob = services.hexToBlob(hexString);
      
      expect(blob).toBeInstanceOf(Blob);
      expect(blob.type).toBe('application/octet-stream');
      expect(blob.size).toBe(11); // "Hello World" is 11 bytes
    });

    it('should handle empty hex string', () => {
      const hexString = '';
      const blob = services.hexToBlob(hexString);
      
      expect(blob).toBeInstanceOf(Blob);
      expect(blob.size).toBe(0);
    });

    it('should handle single byte hex string', () => {
      const hexString = '41'; // 'A' in hex
      const blob = services.hexToBlob(hexString);
      
      expect(blob).toBeInstanceOf(Blob);
      expect(blob.size).toBe(1);
    });
  });

  describe('hexToUInt8Array', () => {
    it('should convert hex string to Uint8Array correctly', () => {
      const hexString = '48656c6c6f20576f726c64'; // "Hello World" in hex
      const uint8Array = services.hexToUInt8Array(hexString);
      
      expect(uint8Array).toBeInstanceOf(Uint8Array);
      expect(uint8Array.length).toBe(11);
      expect(uint8Array[0]).toBe(72); // 'H' ASCII
      expect(uint8Array[10]).toBe(100); // 'd' ASCII
    });

    it('should throw error for odd length hex string', () => {
      const hexString = '48656c6c6f20576f726c6'; // Odd length
      
      expect(() => {
        services.hexToUInt8Array(hexString);
      }).toThrow('Invalid hex string: length must be even');
    });

    it('should handle empty hex string', () => {
      const hexString = '';
      const uint8Array = services.hexToUInt8Array(hexString);
      
      expect(uint8Array).toBeInstanceOf(Uint8Array);
      expect(uint8Array.length).toBe(0);
    });
  });

  describe('blobToHex', () => {
    it('should convert blob to hex string correctly', async () => {
      const testData = new Uint8Array([72, 101, 108, 108, 111]); // "Hello"
      const blob = new Blob([testData], { type: 'text/plain' });
      
      const hexString = await services.blobToHex(blob);
      
      expect(hexString).toBe('48656c6c6f');
    });

    it('should handle empty blob', async () => {
      const blob = new Blob([], { type: 'text/plain' });
      
      const hexString = await services.blobToHex(blob);
      
      expect(hexString).toBe('');
    });
  });
});