public void RemoveRandom()
{
var rd = new RouletteDictionary <string, int>();
for (int i = 0; i < 10; i++)
{
rd[i.ToString()] = i;
}
bool removed = rd.RemoveRandom();
Assert.True(removed);
Assert.Equal(9, rd.Count);
}
public void RemoveRandomWithCondition()
{
var rd = new RouletteDictionary <string, int>();
for (int i = 0; i < 10; i++)
{
rd[i.ToString()] = i;
}
// remove all 5 even numbers using RemoveRandom
for (int i = 0; i < 5; i++)
{
bool removed = rd.RemoveRandom((val) => val % 2 == 0);
Assert.True(removed);
}
// make sure everything left is odd.
Assert.Equal(5, rd.Count);
foreach (int val in rd.Values)
{
Assert.True(val % 2 == 1);
}
}