DataFactoryTestingFrameworkExpressionsEvaluator adds status property even if None is set. #164
Description
We have scenarios where certain Activity outputs (like status as described in #162 ) are not present on the Activity Outputs.
Currently neither functional tests nor activity tests can capture these scenarios because we add the status always to the activity results (see https://github.com/microsoft/data-factory-testing-framework/blob/main/src/data_factory_testing_framework/_pythonnet/data_factory_testing_framework_expressions_evaluator.py#L40).
The expression evaluator returns a error we can handle to mimic the behaviour:
> raise Exception(f"Unknown error: {e}") from e
E Exception: Unknown error: The template language expression 'contains(
E createArray(
E activity('Fail').status,
E activity('Notebook').status
E ),
E 'Failed'
E )' cannot be evaluated because property 'status' doesn't exist, available properties are 'output, error'. Please see https://aka.ms/logicexpressions for usage details.
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionTextExpression.SelectObjectProperty(JObject root, JToken property, Boolean safeDereference)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionTextExpression.SelectProperty(JToken root, TemplateDereferenceExpression[] dereferences, TemplateExpressionEvaluationContext context, Boolean failOnError)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionTextExpression.EvaluateRootExpression(TemplateExpressionEvaluationContext context, Boolean failOnError, ISkippableEnumerator`1 parameterValues, Int32 parametersCount)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionExpression.EvaluateExpression(TemplateExpressionEvaluationContext context, Boolean failOnError)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionExpression.LazyParameterEnumerator.MoveNext(Int32 skip)
E at Microsoft.Azure.Workflows.Templates.ISkippableEnumeratorExtensions.ToEnumerable[T](ISkippableEnumerator`1 enumerator)+MoveNext()
E at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
E at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateExpressionBuiltInFunctions.EvaluateFunction(String functionName, ISkippableEnumerator`1 parameters, Int32 parametersCount, Boolean preserveAnnotations)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateExpressionEvaluationHelper.EvaluateFunction(String functionName, ISkippableEnumerator`1 parameters, Int32 parametersCount)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionTextExpression.EvaluateRootExpression(TemplateExpressionEvaluationContext context, Boolean failOnError, ISkippableEnumerator`1 parameterValues, Int32 parametersCount)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionExpression.EvaluateExpression(TemplateExpressionEvaluationContext context, Boolean failOnError)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionExpression.LazyParameterEnumerator.MoveNext(Int32 skip)
E at Microsoft.Azure.Workflows.Templates.ISkippableEnumeratorExtensions.ToEnumerable[T](ISkippableEnumerator`1 enumerator)+MoveNext()
E at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
E at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateExpressionBuiltInFunctions.EvaluateFunction(String functionName, ISkippableEnumerator`1 parameters, Int32 parametersCount, Boolean preserveAnnotations)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateExpressionEvaluationHelper.EvaluateFunction(String functionName, ISkippableEnumerator`1 parameters, Int32 parametersCount)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionTextExpression.EvaluateRootExpression(TemplateExpressionEvaluationContext context, Boolean failOnError, ISkippableEnumerator`1 parameterValues, Int32 parametersCount)
E at Microsoft.Azure.Workflows.Templates.Expressions.TemplateFunctionExpression.EvaluateExpression(TemplateExpressionEvaluationContext context, Boolean failOnError)
E at Microsoft.Azure.Workflows.Templates.Helpers.TemplateExpressionsHelper.EvaluateTemplateLanguageExpression(String expression, TemplateExpressionEvaluationContext evaluationContext)
E at Microsoft.Azure.DataFactoryTestingFramework.Expressions.Evaluator.EvaluateExpression(String expression, String parametersJson, String variablesJson, String itemValueJson, String activityValuesJson)
E at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
E at System.Reflection.MethodBaseInvoker.InvokeWithManyArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
Proposed solution:
Only add the add properties if they are set to anything other than None.