public void TestToString()
{
var inc = new Incrementor(0, 10);
inc.ToString().Should().Be("0");
for (int i = 1; i <= 10; i++)
{
inc = inc.IncrementValue();
inc.ToString().Should().Be(i.ToString());
}
}
public void TestIncrementBy1()
{
var inc = new Incrementor(0, 10);
inc.Value.Should().Be(0);
for (int i = 1; i <= 10; i++)
{
inc = inc.IncrementValue();
inc.Value.Should().Be(i);
}
}
public void TestIncrementBy2()
{
var inc = new Incrementor(10, 20, 2);
inc.Value.Should().Be(10);
for (int i = 1; i <= 5; i++)
{
inc = inc.IncrementValue();
inc.Value.Should().Be(10 + 2 * i);
}
}
public void TestNoParentIncrementor()
{
var inc1 = new Incrementor(0, 3);
inc1.CanIncrement.Should().BeTrue();
var maxInc = inc1.IncrementValue().IncrementValue().IncrementValue();
maxInc.CanIncrement.Should().BeFalse();
Action act = () => maxInc.IncrementValue();
act.ShouldThrow <InvalidOperationException>();
}
public void TestLongCombined()
{
int incrementorCount = _random.Next(3, 10);
Incrementor[] incrementors = Enumerable.Range(1, incrementorCount).Select(i => CreateRandomIncrementor()).ToArray();
Incrementor combined = Incrementor.CreateCombined(incrementors);
int count = 0;
while (combined.CanIncrement)
{
count++;
combined = combined.IncrementValue();
}
int expectedPossibilities = (incrementors.Select(i => i.Maximum).Aggregate(1, (a, i) => a * (i + 1)) - 1);
count.Should().Be(expectedPossibilities);
string expectedFinalString = string.Join("", incrementors.Select(i => i.Maximum.ToString()));
combined.ToString().Should().Be(expectedFinalString);
}
