/// <summary>
/// Gets the keys of a weak map using reflection
/// </summary>
/// <param name="weakMap">The WeakMapInstance</param>
/// <returns>Keys</returns>
public static IEnumerable <ObjectInstance> GetKeys(this ConditionalWeakTable <ObjectInstance, object> weakMap)
{
IEnumerable <ObjectInstance> keys = weakMap.GetType().InvokeMember(
"Keys",
BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.NonPublic,
null,
weakMap,
new object[] { }) as IEnumerable <ObjectInstance>;
return(keys);
}
public static void Clear_AllValuesRemoved(int numObjects)
{
var cwt = new ConditionalWeakTable <object, object>();
MethodInfo clear = cwt.GetType().GetMethod("Clear", BindingFlags.NonPublic | BindingFlags.Instance);
if (clear == null)
{
// Couldn't access the Clear method; skip the test.
return;
}
object[] keys = Enumerable.Range(0, numObjects).Select(_ => new object()).ToArray();
object[] values = Enumerable.Range(0, numObjects).Select(_ => new object()).ToArray();
for (int iter = 0; iter < 2; iter++)
{
// Add the objects
for (int i = 0; i < numObjects; i++)
{
cwt.Add(keys[i], values[i]);
Assert.Same(values[i], cwt.GetValue(keys[i], _ => new object()));
}
// Clear the table
clear.Invoke(cwt, null);
// Verify the objects are removed
for (int i = 0; i < numObjects; i++)
{
object ignored;
Assert.False(cwt.TryGetValue(keys[i], out ignored));
}
// Do it a couple of times, to make sure the table is still usable after a clear.
}
}
public static void Clear_AllValuesRemoved(int numObjects)
{
var cwt = new ConditionalWeakTable<object, object>();
MethodInfo clear = cwt.GetType().GetMethod("Clear", BindingFlags.NonPublic | BindingFlags.Instance);
if (clear == null)
{
// Couldn't access the Clear method; skip the test.
return;
}
object[] keys = Enumerable.Range(0, numObjects).Select(_ => new object()).ToArray();
object[] values = Enumerable.Range(0, numObjects).Select(_ => new object()).ToArray();
for (int iter = 0; iter < 2; iter++)
{
// Add the objects
for (int i = 0; i < numObjects; i++)
{
cwt.Add(keys[i], values[i]);
Assert.Same(values[i], cwt.GetValue(keys[i], _ => new object()));
}
// Clear the table
clear.Invoke(cwt, null);
// Verify the objects are removed
for (int i = 0; i < numObjects; i++)
{
object ignored;
Assert.False(cwt.TryGetValue(keys[i], out ignored));
}
// Do it a couple of times, to make sure the table is still usable after a clear.
}
}