private static FirewallLayer[] _getLayersFromString(string input)
{
IEnumerable <string> lines = input.Split("\n", StringSplitOptions.RemoveEmptyEntries);
Dictionary <int, int> parsed = lines
.Select(x => x.Trim().Split(": ", StringSplitOptions.RemoveEmptyEntries))
.Select(pairs => (Int32.Parse(pairs[0]), Int32.Parse(pairs[1])))
.ToDictionary(x => x.Item1, x => x.Item2);
var lastIndex = parsed.Last().Key;
List <FirewallLayer> layers = new List <FirewallLayer>();
for (int i = 0; i < lastIndex + 1; i++)
{
FirewallLayer layer;
if (parsed.ContainsKey(i))
{
layer = new FirewallLayer(parsed[i], true);
}
else
{
layer = new FirewallLayer(1, false);
}
layers.Add(layer);
}
return(layers.ToArray());
}
public void MoveScannerCorrectly()
{
FirewallLayer layer = new FirewallLayer(3, true);
Assert.False(layer.SafeAtTime(0));
Assert.True(layer.SafeAtTime(1));
Assert.False(layer.SafeAtTime(4));
}
public void MoveScannerWhenLengthIsTwo()
{
FirewallLayer layer = new FirewallLayer(2, true);
Assert.False(layer.SafeAtTime(0));
Assert.True(layer.SafeAtTime(1));
Assert.False(layer.SafeAtTime(2));
}
public void CaclculateSafetyAtGivenTime()
{
FirewallLayer layer = new FirewallLayer(4, true);
Assert.False(layer.SafeAtTime(0));
Assert.True(layer.SafeAtTime(1));
Assert.True(layer.SafeAtTime(2));
Assert.True(layer.SafeAtTime(3));
Assert.True(layer.SafeAtTime(4));
Assert.True(layer.SafeAtTime(5));
Assert.False(layer.SafeAtTime(6));
Assert.True(layer.SafeAtTime(7));
FirewallLayer layerWithoutScanner = new FirewallLayer(2, false);
Assert.True(layerWithoutScanner.SafeAtTime(0));
Assert.True(layerWithoutScanner.SafeAtTime(100));
}
