public void WhenMinIsLessThanMax_ThenReturnRandomLength()
{
var createdLen2 = false;
var createdLen3 = false;
using (var sut = new CryptoRandomString("A"))
{
for (var i = 0; i < 100; i++)
{
var result = sut.GenerateArray(2, 3);
if (result.Length == 2)
{
createdLen2 = true;
Assert.That(result.First(), Is.EqualTo('A'));
Assert.That(result.Second(), Is.EqualTo('A'));
}
else if (result.Length == 3)
{
createdLen3 = true;
Assert.That(result.First(), Is.EqualTo('A'));
Assert.That(result.Second(), Is.EqualTo('A'));
Assert.That(result.Third(), Is.EqualTo('A'));
}
else
{
Assert.Fail($"Array was length {result.Length}.");
}
}
}
Assert.That(createdLen2, Is.True);
Assert.That(createdLen3, Is.True);
}
public void WhenMinIsGreaterThanMax_ThenThrowException()
{
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
Assert.Throws <ArgumentOutOfRangeException>(() => sut.GenerateArray(2, 1));
}
}
public void WhenValidChars_ThenReturnOnlyValidChars()
{
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
var result = sut.GenerateArray(100);
Assert.That(result.IsDigitsOnly, Is.True);
}
}
public void WhenOnlyOneValidChar_AndLengthOne_ThenReturnChar()
{
using (var sut = new CryptoRandomString("A"))
{
var result = sut.GenerateArray(1);
Assert.That(result.Single(), Is.EqualTo('A'));
}
}
public void WhenLengthIsLessThanOne_ThenReturnEmptyArray(int length)
{
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
var result = sut.GenerateArray(length);
Assert.That(result, Is.Empty);
}
}
public void WhenMinIsMinusAndMaxIsZero_ThenReturnEmpty()
{
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
var result = sut.GenerateArray(-1, 0);
Assert.That(result, Is.Empty);
}
}
public void WhenLongEnoughLength_ThenUsesValidCharsEdgeCases()
{
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
var result = sut.GenerateArray(1000);
Assert.That(result.Contains(CharacterSets.Digits.First()), Is.True);
Assert.That(result.Contains(CharacterSets.Digits.Last()), Is.True);
}
}
public void WhenValidLength_ThenReturnCorrectLength()
{
const int length = 50;
using (var sut = new CryptoRandomString(CharacterSets.Digits))
{
var result = sut.GenerateArray(length);
Assert.That(result.Length, Is.EqualTo(length));
}
}
public void WhenOnlyOneValidChar_ThenReturnSequenceOfChar()
{
using (var sut = new CryptoRandomString("A"))
{
var result = sut.GenerateArray(3);
Assert.That(result.First(), Is.EqualTo('A'));
Assert.That(result.Second(), Is.EqualTo('A'));
Assert.That(result.Third(), Is.EqualTo('A'));
}
}