private static bool RunAssertions <T>(TypedSpecification <T> spec, RunResult result, object fromWhen)
{
bool allOk = true;
foreach (var exp in spec.GetAssertions())
{
var partiallyApplied = PartialApplicationVisitor.Apply(exp, fromWhen);
try
{
PAssert.IsTrue(partiallyApplied);
result.Expectations.Add(new ExpectationResult
{
Passed = true,
Text = PAssert.CreateSimpleFormatFor(partiallyApplied),
OriginalExpression = exp
});
}
catch (Exception ex)
{
allOk = false;
result.Expectations.Add(new ExpectationResult
{
Passed = false,
Text = PAssert.CreateSimpleFormatFor(partiallyApplied),
OriginalExpression = exp,
Exception = ex
});
}
}
return(allOk);
}
public static Expression <Func <bool> > Apply <T>(Expression <Func <T, bool> > expr, object value)
{
var paramExprToReplace = expr.Parameters[0];
var valueToApply = Expression.Constant(value, value.GetType());
var visitor = new PartialApplicationVisitor(paramExprToReplace, valueToApply);
var oldBody = expr.Body;
var newBody = visitor.Visit(oldBody);
return(Expression.Lambda <Func <bool> >(newBody));
}
private RunResult Run <T>(TypedSpecification <T> spec)
{
var result = new RunResult {
SpecificationName = spec.GetName()
};
try
{
var before = spec.GetBefore();
before.InvokeIfNotNull();
}
catch (Exception ex)
{
result.MarkFailure("Before Failed", ex.InnerException);
return(result);
}
object sut = null;
try
{
var given = spec.GetOn();
sut = given.DynamicInvoke();
result.On = given;
}
catch (Exception ex)
{
result.MarkFailure("On Failed", ex.InnerException);
}
object whenResult = null;
Delegate when;
try
{
when = spec.GetWhen();
if (when == null)
{
return new RunResult {
SpecificationName = spec.GetName(), Passed = false, Message = "No when on specification"
}
}
;
if (when.Method.GetParameters().Length == 1)
{
whenResult = when.DynamicInvoke(new[] { sut });
}
else
{
whenResult = when.DynamicInvoke();
}
if (when.Method.ReturnType != typeof(void))
{
result.Result = whenResult;
}
else
{
result.Result = sut;
}
}
catch (Exception ex)
{
result.MarkFailure("When Failed", ex.InnerException);
return(result);
}
var fromWhen = when.Method.ReturnType == typeof(void) ? sut : whenResult;
bool allOk = true;
foreach (var exp in spec.GetAssertions())
{
var partiallyApplied = PartialApplicationVisitor.Apply(exp, fromWhen);
try
{
PAssert.IsTrue(partiallyApplied);
result.Expectations.Add(new ExpectationResult {
Passed = true, Text = PAssert.CreateSimpleFormatFor(partiallyApplied), OriginalExpression = exp
});
}
catch (Exception ex)
{
allOk = false;
result.Expectations.Add(new ExpectationResult {
Passed = false, Text = PAssert.CreateSimpleFormatFor(partiallyApplied), OriginalExpression = exp, Exception = ex
});
}
}
try
{
var Finally = spec.GetFinally();
Finally.InvokeIfNotNull();
}
catch (Exception ex)
{
allOk = false;
result.Message = "Finally failed";
result.Thrown = ex.InnerException;
}
result.Passed = allOk;
return(result);
}