public static void PredictInput()
{
const string Input = "Hello world";
MyPredictor slow = MyPredictor.SlowPredictor;
MyPredictor fast = MyPredictor.FastPredictor;
Ast ast = Parser.ParseInput(Input, out Token[] tokens, out _);
// Returns null when no predictor implementation registered
List <PredictionResult> results = CommandPrediction.PredictInput(Client, ast, tokens).Result;
Assert.Null(results);
try
{
// Register 2 predictor implementations
SubsystemManager.RegisterSubsystem <ICommandPredictor, MyPredictor>(slow);
SubsystemManager.RegisterSubsystem(SubsystemKind.CommandPredictor, fast);
// Expect the results from 'fast' predictor only b/c the 'slow' one
// cannot finish before the specified timeout.
// The specified timeout is exaggerated to make the test reliable.
// xUnit must spin up a lot tasks, which makes the test unreliable when the time difference between 'delay' and 'timeout' is small.
results = CommandPrediction.PredictInput(Client, ast, tokens, millisecondsTimeout: 1000).Result;
Assert.Single(results);
PredictionResult res = results[0];
Assert.Equal(fast.Id, res.Id);
Assert.Equal(Session, res.Session);
Assert.Equal(2, res.Suggestions.Count);
Assert.Equal($"'{Input}' from '{Client}' - TEST-1 from {fast.Name}", res.Suggestions[0].SuggestionText);
Assert.Equal($"'{Input}' from '{Client}' - TeSt-2 from {fast.Name}", res.Suggestions[1].SuggestionText);
// Expect the results from both 'slow' and 'fast' predictors
// Same here -- the specified timeout is exaggerated to make the test reliable.
// xUnit must spin up a lot tasks, which makes the test unreliable when the time difference between 'delay' and 'timeout' is small.
results = CommandPrediction.PredictInput(Client, ast, tokens, millisecondsTimeout: 4000).Result;
Assert.Equal(2, results.Count);
PredictionResult res1 = results[0];
Assert.Equal(slow.Id, res1.Id);
Assert.Equal(Session, res1.Session);
Assert.Equal(2, res1.Suggestions.Count);
Assert.Equal($"'{Input}' from '{Client}' - TEST-1 from {slow.Name}", res1.Suggestions[0].SuggestionText);
Assert.Equal($"'{Input}' from '{Client}' - TeSt-2 from {slow.Name}", res1.Suggestions[1].SuggestionText);
PredictionResult res2 = results[1];
Assert.Equal(fast.Id, res2.Id);
Assert.Equal(Session, res2.Session);
Assert.Equal(2, res2.Suggestions.Count);
Assert.Equal($"'{Input}' from '{Client}' - TEST-1 from {fast.Name}", res2.Suggestions[0].SuggestionText);
Assert.Equal($"'{Input}' from '{Client}' - TeSt-2 from {fast.Name}", res2.Suggestions[1].SuggestionText);
}
finally
{
SubsystemManager.UnregisterSubsystem <ICommandPredictor>(slow.Id);
SubsystemManager.UnregisterSubsystem(SubsystemKind.CommandPredictor, fast.Id);
}
}
Task <List <PredictionResult> > IPSConsoleReadLineMockableMethods.PredictInput(Ast ast, Token[] tokens)
{
return(CommandPrediction.PredictInput(PSReadLine, ast, tokens));
}