public void BySymbol_returnsExistingInstance()
{
//Arrange
Mock <ITimeframeService> mockService = new Mock <ITimeframeService>();
Timeframe expectedTimeframe = new Timeframe(DEFAULT_ID, DEFAULT_NAME, DEFAULT_UNIT_TYPE, DEFAULT_UNITS_COUNTER);
mockService.Setup(s => s.GetTimeframeByName(DEFAULT_NAME)).Returns(expectedTimeframe);
Timeframe.injectService(mockService.Object);
//Act.
Timeframe timeframe = Timeframe.ByName(DEFAULT_NAME);
//Assert.
Assert.AreSame(expectedTimeframe, timeframe);
}