import * as assert from 'assert';
import { describe, it } from 'mocha';
import * as types from '../src/types';
const typeforce = require('typeforce');

describe('types', () => {
  describe('Buffer Hash160/Hash256', () => {
    const buffer20byte = Buffer.alloc(20);
    const buffer32byte = Buffer.alloc(32);

    it('return true for valid size', () => {
      assert(types.Hash160bit(buffer20byte));
      assert(types.Hash256bit(buffer32byte));
    });

    it('return true for oneOf', () => {
      assert.doesNotThrow(() => {
        typeforce(
          types.oneOf(types.Hash160bit, types.Hash256bit),
          buffer32byte,
        );
      });

      assert.doesNotThrow(() => {
        typeforce(
          types.oneOf(types.Hash256bit, types.Hash160bit),
          buffer32byte,
        );
      });
    });

    it('throws for invalid size', () => {
      assert.throws(() => {
        types.Hash160bit(buffer32byte);
      }, /Expected Buffer\(Length: 20\), got Buffer\(Length: 32\)/);

      assert.throws(() => {
        types.Hash256bit(buffer20byte);
      }, /Expected Buffer\(Length: 32\), got Buffer\(Length: 20\)/);
    });
  });

  describe('Satoshi', () => {
    [
      { value: -1, result: false },
      { value: 0, result: true },
      { value: 1, result: true },
      { value: 20999999 * 1e8, result: true },
      { value: 21000000 * 1e8, result: true },
      { value: 21000001 * 1e8, result: false },
    ].forEach(f => {
      it('returns ' + f.result + ' for valid for ' + f.value, () => {
        assert.strictEqual(types.Satoshi(f.value), f.result);
      });
    });
  });
});