public void GetPrimes_NoExistingList_ReturnsExpectedPrimes()
{
var expectedPrimes = new List <int> {
2, 3, 5, 7
};
var cachedPrimes = new PrimeNumberCache().GetPrimesTo(10);
CollectionAssert.AreEqual(expectedPrimes, cachedPrimes);
}
public void GetPrimes_NoExistingList_CallsGenerateTo()
{
var localTestGenerator = TestGenerator;
var testCache = new PrimeNumberCache(localTestGenerator);
testCache.GetPrimesTo(10);
A.CallTo(() => localTestGenerator.GeneratePrimesTo(A <int> ._)).MustHaveHappened(Repeated.Exactly.Once);
}
public void GetPrimes_ExistingList_TargetLess_ReturnsExpectedPrimes()
{
var initialPrimes = new List <int> {
2, 3, 5, 7, 11, 13, 17, 19
};
var expectedPrimes = new List <int> {
2, 3, 5, 7
};
var cachedPrimes = new PrimeNumberCache(initialPrimes).GetPrimesTo(10);
CollectionAssert.AreEqual(expectedPrimes, cachedPrimes);
}
public void GetPrimes_ExisitngList_TargetLess_DoesNotCallGenerator()
{
var initialPrimes = new List <int> {
2, 3, 5, 7, 11
};
var localTestGenerator = TestGenerator;
var testCache = new PrimeNumberCache(initialPrimes, localTestGenerator);
testCache.GetPrimesTo(5);
A.CallTo(() => localTestGenerator.GeneratePrimesBetween(A <int> ._, A <int> ._)).MustNotHaveHappened();
A.CallTo(() => localTestGenerator.GeneratePrimesTo(A <int> ._)).MustNotHaveHappened();
}
public void GetPrimes_ExistingList_TargetGreater_CallsGenerateBetween()
{
var primes = new List <int> {
2, 3, 5
};
var localTestGenerator = TestGenerator;
var testCache = new PrimeNumberCache(primes, localTestGenerator);
testCache.GetPrimesTo(10);
A.CallTo(() => localTestGenerator.GeneratePrimesBetween(A <int> ._, A <int> ._)).MustHaveHappened(Repeated.Exactly.Once);
A.CallTo(() => localTestGenerator.GeneratePrimesTo(A <int> ._)).MustNotHaveHappened();
}
