// http://tddbin.com/#?kata=es6/language/symbol/for

// 35: Symbol.for - retrieves or creates a runtime-wide symbol
// To do: make all tests pass, leave the assert lines unchanged!

describe('`Symbol.for` for registering Symbols globally', function() {
  
  it('creates a new symbol (check via `typeof`)', function() {
    const symbolType = typeof Symbol.for('symbol name');
    assert.equal(symbolType, 'symbol');
  });
  
  it('stores the symbol in a runtime-wide registry and retrieves it from it', function() {
    const sym = Symbol.for('new symbol');
    const sym1 = Symbol.for('new symbol');
    
    assert.equal(sym, sym1);
  });
  
  it('is different to `Symbol()` which creates a symbol every time and does not store it', function() {
    var localSymbol = Symbol.for('new symbol');
    var globalSymbol = Symbol('new symbol');
    
    assert.notEqual(globalSymbol, localSymbol);
  });
  
  describe('`.toString()` on a Symbol', function() {
    
    const localSymbol = Symbol('new symbol');
    const symbolFromRegistry = Symbol.for('new symbol');
    
    it('also contains the key given to `Symbol.for()`', function() {
      const description = symbolFromRegistry.toString();
      assert.equal(description, 'Symbol(new symbol)');
    });
  
    describe('NOTE: the description of two different symbols', function() {
      it('might be the same', function() {
        const localDescription = localSymbol.toString();
        const fromRegistryDescription = symbolFromRegistry.toString();
        
        assert.equal(localDescription, fromRegistryDescription);
      });
      
      it('but the symbols are not the same!', function() {
        assert.notEqual(localSymbol, symbolFromRegistry);
      });
    });    
  });
  
});