SmartTestErrorCaseTParam, T Method (ExpressionFuncTParam, EnumTypeHelperPlaceHolderT, T)

Creates an instance of Case class for a specific parameter path to manage errors.

Namespace: SmartTests
Assembly: SmartTests (in SmartTests.dll) Version: 1.12.0

Syntax

public static Case ErrorCase<TParam, T>(
	Expression<Func<TParam, EnumTypeHelperPlaceHolder<T>>> path,
	out T value
)
where T : struct, new(), IComparable

Public Shared Function ErrorCase(Of TParam, T As {Structure, New, IComparable}) ( 
	path As Expression(Of Func(Of TParam, EnumTypeHelperPlaceHolder(Of T))),
	<OutAttribute> ByRef value As T
) As Case

public:
generic<typename TParam, typename T>
where T : value class, gcnew(), IComparable
static Case^ ErrorCase(
	Expression<Func<TParam, EnumTypeHelperPlaceHolder<T>^>^>^ path, 
	[OutAttribute] T% value
)

static member ErrorCase : 
        path : Expression<Func<'TParam, EnumTypeHelperPlaceHolder<'T>>> * 
        value : 'T byref -> Case  when 'T : struct, new() and IComparable

Parameters

path: Type: System.Linq.ExpressionsExpressionFuncTParam, EnumTypeHelperPlaceHolderT
An Expression of the path and the criteria for the parameter of the method to test.
value: Type: T
One random value from the provided values in the equivalence class.

Type Parameters

TParam: The type of the parameter of the method to test.
T: The type of the parameter

Return Value

Type: Case
The newly created Case.

Remarks

Warning: Not all lambda can be used.

It has to have 2 constraints:

Valid Parameter Name -
Valid Parameter Type -
Valid Path -

Examples

Copy

static class DateTimeHelper
{
    public static bool IsWeekEnd(DateTime date)
    {
        return date.DayOfWeek == DayOfWeek.Saturday ||
               date.DayOfWeek == DayOfWeek.Sunday;
    }
}

...

private static DateTime GenerateDateOnWeekDay( DayOfWeek day )
{
    var result = DateTime.Now;
    return result.AddDays( day - result.DayOfWeek );
}

[Test]
public void WeekEndTest()
{
    // You will have a warning because you do not test other days of the week
    var result = RunTest( ErrorCase( (DateTime date) => date.DayOfWeek.Values( DayOfWeek.Saturday, DayOfWeek.Sunday ), out var value ),
                          () => DateTimeHelper.IsWeekEnd( GenerateDateOnWeekDay( value ) ) );

    Assert.IsTrue( result );
}

Reference

SmartTest Class

ErrorCase Overload

SmartTests Namespace

SmartTestCaseTParam, T(ExpressionFuncTParam, EnumTypeHelperPlaceHolderT, T, T)

SmartTestCaseTParam, T(ExpressionFuncTParam, INumericTypeT, T, T)

SmartTestCaseT(ExpressionFuncT, Object, Criteria)

SmartTestCase(Criteria)

SmartTestCase(String, Criteria)

SmartTestsCase