public void ById_returnsExistingInstance()
{
//Arrange
Mock <ICurrencyService> mockService = new Mock <ICurrencyService>();
FxPair expectedPair = defaultFxPair();
mockService.Setup(c => c.GetFxPairById(DEFAULT_ID)).Returns(expectedPair);
FxPair.injectService(mockService.Object);
//Act.
FxPair pair = FxPair.ById(DEFAULT_ID);
//Assert.
Assert.AreSame(pair, expectedPair);
}
public void ById_returnsNull_ifNotExistInRepository()
{
//Arrange
Mock <ICurrencyService> mockService = new Mock <ICurrencyService>();
FxPair nullFxPair = null;
mockService.Setup(c => c.GetFxPairById(DEFAULT_ID)).Returns(nullFxPair);
FxPair.injectService(mockService.Object);
//Act.
FxPair pair = FxPair.ById(DEFAULT_ID);
//Assert.
Assert.IsNull(pair);
}
public void ById_returnsTheSameInstance_afterAddingNewItem()
{
//Arrange
Mock <ICurrencyService> mockService = new Mock <ICurrencyService>();
FxPair expectedPair = defaultFxPair();
mockService.Setup(c => c.GetFxPairById(DEFAULT_ID)).Returns(expectedPair);
FxPair.injectService(mockService.Object);
//Act
FxPair pair1 = FxPair.ById(1);
FxPair pair2 = FxPair.ById(1);
//Assert
Assert.AreSame(pair1, pair2);
}
