public void RemoveOneInstance()
{
ProjectStringCache cache = new ProjectStringCache();
XmlDocument document = new XmlDocument();
string stringToAdd = "Test1";
string return1 = cache.Add(stringToAdd, document);
Assert.AreEqual(1, cache.Count);
XmlDocument document2 = new XmlDocument();
string return2 = cache.Add(stringToAdd, document2);
Assert.AreEqual(1, cache.Count);
cache.Clear(document2);
// Since there is still one document referencing the string, it should remain.
Assert.AreEqual(1, cache.Count);
// Build a new string guaranteed not to be optimized by the compiler into the same instance.
StringBuilder builder = new StringBuilder();
builder.Append("Test");
builder.Append("1");
XmlDocument document3 = new XmlDocument();
string return3 = cache.Add(builder.ToString(), document3);
// Returned references should be the same
Assert.AreSame(return1, return3);
// Still should only be one cached instance.
Assert.AreEqual(1, cache.Count);
}
public void RemoveLastInstanceDeallocatesEntry()
{
ProjectStringCache cache = new ProjectStringCache();
XmlDocument document = new XmlDocument();
string stringToAdd = "Test1";
string return1 = cache.Add(stringToAdd, document);
cache.Clear(document);
// Should be no instances left.
Assert.AreEqual(0, cache.Count);
// Build a new string guaranteed not to be optimized by the compiler into the same instance.
StringBuilder builder = new StringBuilder();
builder.Append("Test");
builder.Append("1");
XmlDocument document2 = new XmlDocument();
string return2 = cache.Add(builder.ToString(), document2);
// Returned references should NOT be the same
Assert.AreNotSame(return1, return2);
}