public void Compute_NoMatchRule_ShouldReturnInput(int input)
{
var ruleProvider = Substitute.For <IRuleProvider>();
ruleProvider.Match(input).Returns(Enumerable.Empty <IRule>());
var formatter = new FizzBuzzFormatter(ruleProvider);
var output = formatter.Compute(input);
Assert.Equal(input.ToString(), output);
}
public void Compute_MatchSingleRule_ShouldReturnRuleLabel()
{
var i = 11;
var expected = "Fizz";
var ruleProvider = Substitute.For <IRuleProvider>();
var fizzRule = Substitute.For <IRule>();
fizzRule.Label.Returns(expected);
ruleProvider.Match(i).Returns(new[] { fizzRule });
var formatter = new FizzBuzzFormatter(ruleProvider);
var output = formatter.Compute(i);
Assert.Equal(expected, output);
}
public void Compute_MatchMultipleRuleWithSameLabel_ShouldReturnSingleRuleLabel()
{
var i = 11;
var expected = "Fizz";
var ruleProvider = Substitute.For <IRuleProvider>();
var fizzRules = new List <IRule> {
Substitute.For <IRule>(), Substitute.For <IRule>()
};
fizzRules.ForEach(rule => rule.Label.Returns(expected));
ruleProvider.Match(i).Returns(fizzRules);
var formatter = new FizzBuzzFormatter(ruleProvider);
var output = formatter.Compute(i);
Assert.Equal(expected, output);
}
public void Compute_MatchMultipleRuleWithDifferentLabel_ShouldReturnAggregateRuleLabel()
{
var i = 11;
var expected1 = "Fizz";
var expected2 = "Buzz";
var expected = expected1 + expected2;
var ruleProvider = Substitute.For <IRuleProvider>();
var fizzRule1 = Substitute.For <IRule>();
fizzRule1.Label.Returns(expected1);
var fizzRule2 = Substitute.For <IRule>();
fizzRule2.Label.Returns(expected2);
ruleProvider.Match(i).Returns(new[] { fizzRule1, fizzRule2 });
var formatter = new FizzBuzzFormatter(ruleProvider);
var output = formatter.Compute(i);
Assert.Equal(expected, output);
}