/// <summary>Returns a string representation of the contents of the <see cref="Cache"/> object.</summary>
/// <returns>A string representation of the contents of the cache and the number of items in the cache.</returns>
public override string ToString()
{
StringBuilder sb = new StringBuilder();
int cacheItemCount = Purge();
if (cacheItemCount > 0)
{
sb.AppendFormat("Total items in cache = {0:d}, contents:", cacheItemCount);
// manually iterate over enumerator because our implementation of GetEnumerator() first calls Purge() which
// we've already done at this point...
CacheEnumerator enumerator = new CacheEnumerator(_data.GetEnumerator());
try
{
while (enumerator.MoveNext())
{
sb.AppendFormat("\r\n{0}", enumerator.Current);
}
}
finally
{
enumerator.Dispose();
}
}
else
{
sb.Append("Cache is empty.");
}
return(sb.ToString());
}
public void EnumeratorDisposeTest()
{
var head = CreateTestList();
var enumerator = new CacheEnumerator <int, int>(head);
enumerator.Dispose();
bool thrown = false;
try
{
enumerator.MoveNext();
}
catch (ObjectDisposedException)
{
thrown = true;
}
Assert.IsTrue(thrown, "Exception should have thrown on MoveNext");
thrown = false;
try
{
var current = enumerator.Current;
}
catch (ObjectDisposedException)
{
thrown = true;
}
Assert.IsTrue(thrown, "Exception should have thrown on Current");
}
public void EnumeratorGetCurrent()
{
var head = CreateTestList();
var enumerator = new CacheEnumerator <int, int>(head);
var plainEnumerator = (IEnumerator)enumerator;
enumerator.MoveNext();
var current = enumerator.Current;
var plainCurrent = plainEnumerator.Current;
Assert.AreEqual(current, plainCurrent);
}
public void EnumeratorNullList()
{
bool thrown = false;
try
{
var enumerator = new CacheEnumerator <int, int>(null);
}
catch (ArgumentException)
{
thrown = true;
}
Assert.IsTrue(thrown, "Exception should be thrown");
}
public void EnumeratorList()
{
var head = CreateTestList();
var enumerator = new CacheEnumerator <int, int>(head);
int index = 0;
while (enumerator.MoveNext())
{
var current = enumerator.Current;
Assert.IsNotNull(current, "Node shouldn't be null");
Assert.AreEqual(index, current.Key, "Incorrect key");
Assert.AreEqual(index, current.Value, "Incorrect value");
++index;
}
}
/// <summary>Returns a string representation of the contents of the <see cref="Cache"/> object.</summary>
/// <returns>A string representation of the contents of the cache and the number of items in the cache.</returns>
public override string ToString()
{
StringBuilder sb = new StringBuilder();
int cacheItemCount = Purge();
if (cacheItemCount > 0)
{
sb.AppendFormat("Total items in cache = {0:d}, contents:", cacheItemCount);
// manually iterate over enumerator because our implementation of GetEnumerator() first calls Purge() which
// we've already done at this point...
CacheEnumerator enumerator = new CacheEnumerator(_data.GetEnumerator());
try
{
while (enumerator.MoveNext())
{
sb.AppendFormat("\r\n{0}", enumerator.Current);
}
}
finally
{
enumerator.Dispose();
}
}
else
{
sb.Append("Cache is empty.");
}
return sb.ToString();
}
