public void UsageBadVariableActionContext()
{
int numExceptionsCaught = 0;
int numExceptionsExpected = 5;
var tryCatchArgumentException = (Action <Action>)((action) => {
try
{
action();
}
catch (ArgumentException ex)
{
if (ex.ParamName.ToLower() == "ctx")
{
numExceptionsCaught++;
}
}
});
tryCatchArgumentException(() => {
var mwt = new MwtExplorer <TestContext>("test", new TestRecorder <TestContext>());
var policy = new TestPolicy <TestContext>();
var explorer = new EpsilonGreedyExplorer <TestContext>(policy, 0.2f);
mwt.ChooseAction(explorer, "key", new TestContext());
});
tryCatchArgumentException(() =>
{
var mwt = new MwtExplorer <TestContext>("test", new TestRecorder <TestContext>());
var policy = new TestPolicy <TestContext>();
var explorer = new TauFirstExplorer <TestContext>(policy, 10);
mwt.ChooseAction(explorer, "key", new TestContext());
});
tryCatchArgumentException(() =>
{
var mwt = new MwtExplorer <TestContext>("test", new TestRecorder <TestContext>());
var policies = new TestPolicy <TestContext> [2];
for (int i = 0; i < 2; i++)
{
policies[i] = new TestPolicy <TestContext>(i * 2);
}
var explorer = new BootstrapExplorer <TestContext>(policies);
mwt.ChooseAction(explorer, "key", new TestContext());
});
tryCatchArgumentException(() =>
{
var mwt = new MwtExplorer <TestContext>("test", new TestRecorder <TestContext>());
var scorer = new TestScorer <TestContext>(10);
var explorer = new SoftmaxExplorer <TestContext>(scorer, 0.5f);
mwt.ChooseAction(explorer, "key", new TestContext());
});
tryCatchArgumentException(() =>
{
var mwt = new MwtExplorer <TestContext>("test", new TestRecorder <TestContext>());
var scorer = new TestScorer <TestContext>(10);
var explorer = new GenericExplorer <TestContext>(scorer);
mwt.ChooseAction(explorer, "key", new TestContext());
});
Assert.AreEqual(numExceptionsExpected, numExceptionsCaught);
}
public void EndToEndGeneric()
{
uint numActions = 10;
TestRecorder <SimpleContext> recorder = new TestRecorder <SimpleContext>();
TestScorer <SimpleContext> scorer = new TestScorer <SimpleContext>(numActions);
MwtExplorer <SimpleContext> mwtt = new MwtExplorer <SimpleContext>("mwt", recorder);
var explorer = new GenericExplorer <SimpleContext>(scorer, numActions);
EndToEnd(mwtt, explorer, recorder);
}
public void EndToEndSoftmax()
{
uint numActions = 10;
float lambda = 0.5f;
TestRecorder <SimpleContext> recorder = new TestRecorder <SimpleContext>();
TestScorer <SimpleContext> scorer = new TestScorer <SimpleContext>(numActions);
MwtExplorer <SimpleContext> mwtt = new MwtExplorer <SimpleContext>("mwt", recorder);
var explorer = new SoftmaxExplorer <SimpleContext>(scorer, lambda, numActions);
EndToEnd(mwtt, explorer, recorder);
}
public void GenericFixedActionUsingVariableActionInterface()
{
uint numActions = 10;
var scorer = new TestScorer <TestVarContext>(numActions);
var testContext = new TestVarContext(numActions)
{
Id = 100
};
var explorer = new GenericExplorer <TestVarContext>(scorer);
GenericWithContext(numActions, testContext, explorer);
}
public void Generic()
{
uint numActions = 10;
TestScorer <TestContext> scorer = new TestScorer <TestContext>(numActions);
TestContext testContext = new TestContext()
{
Id = 100
};
var explorer = new GenericExplorer <TestContext>(scorer, numActions);
GenericWithContext(numActions, testContext, explorer);
}
public void Softmax()
{
uint numActions = 10;
float lambda = 0.5f;
uint numActionsCover = 100;
float C = 5;
TestRecorder <TestContext> recorder = new TestRecorder <TestContext>();
TestScorer <TestContext> scorer = new TestScorer <TestContext>(numActions);
MwtExplorer <TestContext> mwtt = new MwtExplorer <TestContext>("mwt", recorder);
var explorer = new SoftmaxExplorer <TestContext>(scorer, lambda, numActions);
uint numDecisions = (uint)(numActions * Math.Log(numActions * 1.0) + Math.Log(numActionsCover * 1.0 / numActions) * C * numActions);
uint[] actions = new uint[numActions];
Random rand = new Random();
for (uint i = 0; i < numDecisions; i++)
{
uint chosenAction = mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = (int)i
});
actions[chosenAction - 1]++; // action id is one-based
}
for (uint i = 0; i < numActions; i++)
{
Assert.IsTrue(actions[i] > 0);
}
var interactions = recorder.GetAllInteractions();
Assert.AreEqual(numDecisions, (uint)interactions.Count);
for (int i = 0; i < numDecisions; i++)
{
Assert.AreEqual(i, interactions[i].Context.Id);
}
}
public void Generic()
{
uint numActions = 10;
string uniqueKey = "ManagedTestId";
TestRecorder <TestContext> recorder = new TestRecorder <TestContext>();
TestScorer <TestContext> scorer = new TestScorer <TestContext>(numActions);
MwtExplorer <TestContext> mwtt = new MwtExplorer <TestContext>("mwt", recorder);
var explorer = new GenericExplorer <TestContext>(scorer, numActions);
TestContext testContext = new TestContext()
{
Id = 100
};
uint chosenAction = mwtt.ChooseAction(explorer, uniqueKey, testContext);
var interactions = recorder.GetAllInteractions();
Assert.AreEqual(1, interactions.Count);
Assert.AreEqual(testContext.Id, interactions[0].Context.Id);
}
public void Softmax()
{
uint numActions = 10;
float lambda = 0.5f;
uint numActionsCover = 100;
float C = 5;
var scorer = new TestScorer <TestContext>(numActions);
var explorer = new SoftmaxExplorer <TestContext>(scorer, lambda, numActions);
uint numDecisions = (uint)(numActions * Math.Log(numActions * 1.0) + Math.Log(numActionsCover * 1.0 / numActions) * C * numActions);
var contexts = new TestContext[numDecisions];
for (int i = 0; i < numDecisions; i++)
{
contexts[i] = new TestContext {
Id = i
};
}
SoftmaxWithContext(numActions, explorer, contexts);
}
public void SoftmaxScores()
{
uint numActions = 10;
float lambda = 0.5f;
TestRecorder <TestContext> recorder = new TestRecorder <TestContext>();
TestScorer <TestContext> scorer = new TestScorer <TestContext>(numActions, uniform: false);
MwtExplorer <TestContext> mwtt = new MwtExplorer <TestContext>("mwt", recorder);
var explorer = new SoftmaxExplorer <TestContext>(scorer, lambda, numActions);
Random rand = new Random();
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 100
});
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 101
});
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 102
});
var interactions = recorder.GetAllInteractions();
Assert.AreEqual(3, interactions.Count);
for (int i = 0; i < interactions.Count; i++)
{
// Scores are not equal therefore probabilities should not be uniform
Assert.AreNotEqual(interactions[i].Probability, 1.0f / numActions);
Assert.AreEqual(100 + i, interactions[i].Context.Id);
}
}
public void SoftmaxScores()
{
uint numActions = 10;
float lambda = 0.5f;
var recorder = new TestRecorder <TestContext>();
var scorer = new TestScorer <TestContext>(numActions, uniform: false);
var mwtt = new MwtExplorer <TestContext>("mwt", recorder);
var explorer = new SoftmaxExplorer <TestContext>(scorer, lambda, numActions);
Random rand = new Random();
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 100
});
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 101
});
mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = 102
});
var interactions = recorder.GetAllInteractions();
Assert.AreEqual(3, interactions.Count);
for (int i = 0; i < interactions.Count; i++)
{
// Scores are not equal therefore probabilities should not be uniform
Assert.AreNotEqual(interactions[i].Probability, 1.0f / numActions);
Assert.AreEqual(100 + i, interactions[i].Context.Id);
}
// Verify that policy action is chosen all the time
TestContext context = new TestContext {
Id = 100
};
List <float> scores = scorer.ScoreActions(context);
float maxScore = 0;
uint highestScoreAction = 0;
for (int i = 0; i < scores.Count; i++)
{
if (maxScore < scores[i])
{
maxScore = scores[i];
highestScoreAction = (uint)i + 1;
}
}
explorer.EnableExplore(false);
for (int i = 0; i < 1000; i++)
{
uint chosenAction = mwtt.ChooseAction(explorer, rand.NextDouble().ToString(), new TestContext()
{
Id = (int)i
});
Assert.AreEqual(highestScoreAction, chosenAction);
}
}