public async Task LldbEvalWithContextVarsAsync()
{
_optionPageGrid.ExpressionEvaluationEngine =
ExpressionEvaluationEngineFlag.LLDB_EVAL_WITH_FALLBACK;
RemoteValue mockVariable = CreateMockVariable();
var natvisScope = new NatvisScope();
var contextVar = RemoteValueFakeUtil.CreateSimpleInt("var", 14);
natvisScope.AddScopedName("var", "$var_0");
natvisScope.AddContextVariable("$var_0", contextVar);
await _evaluator.EvaluateExpressionAsync(
"2 + var", _varInfoFactory.Create(mockVariable), natvisScope, "result");
await mockVariable.Received(1).EvaluateExpressionLldbEvalAsync(
Arg.Is("2 + $var_0"), Arg.Is(natvisScope.ContextVariables));
Assert.That(natvisScope.ContextVariables.Count, Is.EqualTo(1));
Assert.That(natvisScope.ContextVariables.ContainsKey("$var_0"));
Assert.That(natvisScope.ContextVariables["$var_0"], Is.EqualTo(contextVar));
await mockVariable.DidNotReceive().EvaluateExpressionAsync(Arg.Any <string>());
}