public void Should_ThrowArgumentException_When_GivingANullChange()
{
// Arrange
string change = null;
// Act & Assert
Assert.Throws <ArgumentException>(() => FrequencyChange.FromStringInput(change));
}
public void Should_ThrowArgumentException_When_GivingANonIntegerString()
{
// Arrange
const string change = "adasad";
// Act & Assert
Assert.Throws <ArgumentException>(() => FrequencyChange.FromStringInput(change));
}
public void Should_GiveTheIntegerFormOfTheChange_When_GivingCorrectNegativeIntegerString()
{
// Arrange
var changeInt = -123;
var change = changeInt.ToString();
// Act
var frequencyChange = FrequencyChange.FromStringInput(change);
// Assert
Assert.NotNull(frequencyChange);
Assert.Equal(changeInt, frequencyChange.Change);
}
public void Should_GiveTheIntegerFormOfTheChange_When_GivingCorrectPositiveIntegerStringWithPlusSign()
{
// Arrange
var changeInt = 123;
var change = $"+{changeInt}";
// Act
var frequencyChange = FrequencyChange.FromStringInput(change);
// Assert
Assert.NotNull(frequencyChange);
Assert.Equal(changeInt, frequencyChange.Change);
}
public void Should_HaveFrequencyNumberThatIsEqualToStartPlusChange_When_ApplyingOneChange()
{
// Arrange
var start = 7683;
var change = FrequencyChange.FromStringInput("+5");
var frequency = Frequency.StartFromInteger(start);
// Act
frequency.Add(change);
// Assert
Assert.Equal(start + change.Change, frequency.FrequencyNumber);
}