public void TestEvaluateCancel()
{
// Arrange
var aFixture = new Fixture();
var expressionContent = aFixture.Create<string>();
var expression = new Expression("not", expressionContent);
var evaluator = new Mock<IExpressionEvaluator>();
var registry = Mock.Of<IEvaluatorSelector>(x => x.GetEvaluator(It.IsAny<Expression>()) == evaluator.Object);
evaluator
.Setup(x => x.Evaluate(It.Is<Expression>(e => e.ToString() == expressionContent),
It.IsAny<RenderingContext>(),
It.IsAny<TalesModel>()))
.Returns(new ExpressionResult(ZptConstants.CancellationToken));
var model = new TalesModel(registry);
var sut = new NotExpressionEvaluator();
// Act
var result = sut.Evaluate(expression, Mock.Of<RenderingContext>(), model);
// Assert
Assert.NotNull(result, "Result nullability");
Assert.AreEqual(true, result.Value, "Correct result");
}
/// <summary>
/// Create an expression from the content of another expression.
/// </summary>
/// <param name="expression">The expression from which to create another expression.</param>
public Expression Create(Expression expression)
{
if(expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
return Create(expression.Content);
}
public void TestSimpleString(string supplied, string expected)
{
// Arrange
var expression = new Expression("string", supplied);
// Act
var result = _sut.Evaluate(expression, Mock.Of<RenderingContext>(), _model);
// Assert
Assert.AreEqual(expected, result.Value);
}
public void Create_FromExpression()
{
// Arrange
var expression = new Expression("foo", "bar:baz");
// Act
var result = _sut.Create(expression);
// Assert
Assert.AreEqual("bar", result.Prefix);
Assert.AreEqual("baz", result.Content);
}
public void TestEvaluate_Five()
{
// Arrange
var expression = new Expression(null, "bar/?prop/ToString");
object expectedResult = _autofixture.Create<DateTime>(), propName = "Day";
_model.Setup(x => x.TryGetRootObject("foo", _element, out expectedResult)).Returns(true);
_model.Setup(x => x.TryGetRootObject("prop", _element, out propName)).Returns(true);
// Act
_sut.Evaluate(expression, _element, _model.Object);
// Assert (by observing an exception)
}
public void GetEvaluator_for_expression_without_prefix_returns_default()
{
// Arrange
var expression = new Expression(null, _autofixture.Create<string>());
_registry.Setup(x => x.GetDefaultEvaluator()).Returns(_evaluator);
// Act
var result = _sut.GetEvaluator(expression);
// Assert
Assert.AreSame(_evaluator, result, "Evaluator returned");
_registry.Verify(x => x.GetDefaultEvaluator(), Times.Once());
}
public void GetEvaluator_for_expression_uses_prefix()
{
// Arrange
var expression = new Expression("foo", _autofixture.Create<string>());
_registry.Setup(x => x.GetEvaluator("foo")).Returns(_evaluator);
// Act
var result = _sut.GetEvaluator(expression);
// Assert
Assert.AreSame(_evaluator, result, "Evaluator returned");
_registry.Verify(x => x.GetEvaluator("foo"), Times.Once());
}
public void TestEvaluate_Four()
{
// Arrange
var expression = new Expression(null, "foo/?prop/ToString");
object expectedResult = _autofixture.Create<DateTime>(), propName = "Day";
_model.Setup(x => x.TryGetRootObject("foo", _element, out expectedResult)).Returns(true);
_model.Setup(x => x.TryGetRootObject("prop", _element, out propName)).Returns(true);
// Act
var result = _sut.Evaluate(expression, _element, _model.Object);
// Assert
Assert.NotNull(result, "Result nullability");
Assert.AreEqual(((DateTime) expectedResult).Day.ToString(), result.Value, "Result value");
}
/// <summary>
/// Evaluate the specified expression, for the given element and model.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <param name="context">The rendering context for the expression being evaluated.</param>
/// <param name="model">The ZPT model, providing the context for evaluation.</param>
public override ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model)
{
object result;
try
{
result = _host.Evaluate(expression.Content, model.GetAllDefinitions());
}
catch(Exception ex)
{
string message = String.Format(Resources.ExceptionMessages.EvaluationFailureFormat, expression.Content);
throw new ModelEvaluationException(message, ex);
}
return new ExpressionResult(result);
}
/// <summary>
/// Evaluate the specified expression, for the given element and model.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <param name="context">The rendering context for the expression being evaluated.</param>
/// <param name="model">The ZPT model, providing the context for evaluation.</param>
public override ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model)
{
if(expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if(context == null)
{
throw new ArgumentNullException(nameof(context));
}
if(model == null)
{
throw new ArgumentNullException(nameof(model));
}
var trimmedContent = expression.Content.TrimStart();
var result = model.Evaluate(ExpressionCreator.Create(trimmedContent), context);
bool booleanResult = this.CoerceToBoolean(result);
return new ExpressionResult(!booleanResult);
}
/// <summary>
/// Evaluate the specified expression, for the given element and model.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <param name="context">The rendering context for the expression being evaluated.</param>
/// <param name="model">The ZPT model, providing the context for evaluation.</param>
public override ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model)
{
if(expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if(context == null)
{
throw new ArgumentNullException(nameof(context));
}
if(model == null)
{
throw new ArgumentNullException(nameof(model));
}
string source = expression.Content, output;
var escapeSequenceIndices = this.FindAndUnescapePlaceholders(source, out output);
output = this.ApplyPlaceholderReplacements(output, escapeSequenceIndices, context, model);
return new ExpressionResult(output);
}
/// <summary>
/// Evaluate the specified expression, for the given element and model.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <param name="context">The rendering context for the expression being evaluated.</param>
/// <param name="model">The ZPT model, providing the context for evaluation.</param>
public override ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model)
{
if(expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if(context == null)
{
throw new ArgumentNullException(nameof(context));
}
if(model == null)
{
throw new ArgumentNullException(nameof(model));
}
var expressionText = expression.Content;
var allDefinitions = model.GetAllDefinitions();
var csharpExpression = _expressionService.GetExpression(expressionText, allDefinitions.Keys);
return new ExpressionResult(csharpExpression.Evaluate(allDefinitions));
}
public void TestWithEscapedDollarsAndReplacements()
{
// Arrange
string content = "Hello $$$name, how are $$$$ you this fine $$${current_state/time_of_day}?";
var expression = new Expression("string", content);
_pathEvaluator
.Setup(x => x.Evaluate(It.Is<Expression>(exp => exp.ToString() == "name"),
It.IsAny<RenderingContext>(),
It.IsAny<TalesModel>()))
.Returns(new ExpressionResult("Fred Bloggs"));
_pathEvaluator
.Setup(x => x.Evaluate(It.Is<Expression>(exp => exp.ToString() == "current_state/time_of_day"),
It.IsAny<RenderingContext>(),
It.IsAny<TalesModel>()))
.Returns(new ExpressionResult("evening"));
// Act
var result = _sut.Evaluate(expression, Mock.Of<RenderingContext>(), _model);
// Assert
Assert.AreEqual("Hello $Fred Bloggs, how are $$ you this fine $evening?", result.Value);
}
/// <summary>
/// Evaluate the specified expression, for the given element and model.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <param name="context">The rendering context for the expression being evaluated.</param>
/// <param name="model">The ZPT model, providing the context for evaluation.</param>
public override ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model)
{
if(expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if(context == null)
{
throw new ArgumentNullException(nameof(context));
}
if(model == null)
{
throw new ArgumentNullException(nameof(model));
}
var expressionText = expression.Content;
var path = Path.Create(expressionText);
var walker = new PathWalker(path);
object output;
try
{
output = this.WalkPath(walker, context, model);
}
catch(TraversalException ex)
{
string message = String.Format(Resources.ExceptionMessages.CouldNotWalkAnyPathsWithExpression,
expressionText,
context?.Element?.Name);
throw new ModelEvaluationException(message, ex) {
ExpressionText = expressionText,
ElementName = context?.Element?.Name
};
}
return new ExpressionResult(output);
}
public void TestEvaluate_One()
{
// Arrange
var expression = new Expression(null, "foo/ToString");
object expectedResult = _autofixture.Create<int>();
_model.Setup(x => x.TryGetRootObject("foo", _element, out expectedResult)).Returns(true);
// Act
var result = _sut.Evaluate(expression, _element, _model.Object);
// Assert
Assert.NotNull(result, "Result nullability");
Assert.AreEqual(expectedResult.ToString(), result.Value, "Result value");
}
/// <summary> /// Evaluate the specified expression, for the given element and model. /// </summary> /// <param name="expression">The expression to evaluate.</param> /// <param name="context">The rendering context for the expression being evaluated.</param> /// <param name="model">The ZPT model, providing the context for evaluation.</param> public abstract ExpressionResult Evaluate(Expression expression, IRenderingContext context, ITalesModel model);
/// <summary>
/// Evaluate the specified TALES expression and return the result.
/// </summary>
/// <param name="talesExpression">The TALES expression to evaluate.</param>
/// <param name="context">The rendering context for which we are evaluating a result.</param>
public virtual ExpressionResult Evaluate(Expression talesExpression, IRenderingContext context)
{
if(talesExpression == null)
{
throw new ArgumentNullException(nameof(talesExpression));
}
if(context == null)
{
throw new ArgumentNullException(nameof(context));
}
var evaluator = EvaluatorRegistry.GetEvaluator(talesExpression);
var output = evaluator.Evaluate(talesExpression, context, this);
ZptConstants.TraceSource.TraceEvent(System.Diagnostics.TraceEventType.Verbose,
4,
Resources.LogMessageFormats.ExpressionEvaluated,
talesExpression.ToString(),
output.Value?? "<null>",
nameof(TalesModel),
nameof(Evaluate));
return output;
}
public void TestEvaluateTalesConvertible(bool conversionValue, bool expectedResult)
{
// Arrange
var aFixture = new Fixture();
var expressionContent = aFixture.Create<string>();
var expression = new Expression("not", expressionContent);
var evaluator = new Mock<IExpressionEvaluator>();
var registry = Mock.Of<IEvaluatorSelector>(x => x.GetEvaluator(It.IsAny<Expression>()) == evaluator.Object);
var convertible = Mock.Of<ITalesConvertible>(x => x.AsBoolean() == conversionValue);
evaluator
.Setup(x => x.Evaluate(It.Is<Expression>(e => e.ToString() == expressionContent),
It.IsAny<RenderingContext>(),
It.IsAny<TalesModel>()))
.Returns(new ExpressionResult(convertible));
var model = new TalesModel(registry);
var sut = new NotExpressionEvaluator();
// Act
var result = sut.Evaluate(expression, Mock.Of<RenderingContext>(), model);
// Assert
Assert.NotNull(result, "Result nullability");
Assert.AreEqual(expectedResult, result.Value, "Correct result");
}