public void WhenALargeNumberIsCalculated_ThenACorrectResultShouldbeReturned()
{
// Arrange
var expected = "MMMCMXCIX";
var service = new RomanNumeralGeneratorService();
// Act
var actual = service.Generate(3999);
// Assert
Assert.Equal(actual, expected);
}
public void WhenALargerNumberIsSubstituted_ThenTheNextSymbolReplacesTheFourth()
{
// Arrange
var expected = "IX";
var service = new RomanNumeralGeneratorService();
// Act
var actual = service.Generate(9);
// Assert
Assert.Equal(actual, expected);
}
public void WhenAValueCanContainFourOfTheSameSymbol_ThenTheNextSymbolReplacesTheFourth()
{
// Arrange
var expected = "IV";
var service = new RomanNumeralGeneratorService();
// Act
var actual = service.Generate(4);
// Assert
Assert.Equal(actual, expected);
}
public void WhenOneIsProvided_ThenTheCorrectSymbolIsReturned()
{
// Arrange
var expected = "I";
var service = new RomanNumeralGeneratorService();
// Act
var actual = service.Generate(1);
// Assert
Assert.Equal(actual, expected);
}
public void WhenANumberOver3999IsProvided_ThenAnErrorMessageIsReturned()
{
// Arrange
var expected = "Please enter a number less than 3999";
var service = new RomanNumeralGeneratorService();
// Act
var actual = service.Generate(4000);
// Assert
Assert.Equal(actual, expected);
}