/// <summary>
/// Starts a chain of assertions on <paramref name="value"/>.
/// Asserts that <paramref name="value"/> is not `null`.
/// </summary>
public static Assertable <T> HasValue <T>(T value, string name = null)
where T : class
{
var parameter = DebugValueExpressionVisitor.GetDebugExpresssion(name ?? "value", value);
if (value == null)
{
TestFrameworkProvider.Fail(GetDiagnosticMessage(Expression.NotEqual(parameter, Expression.Constant(null, typeof(T))), null, s_emptyContext));
return(Assertable <T> .NoOp());
}
return(Assertable <T> .FromValueExpression(value, parameter));
}
/// <summary>
/// Starts a chain of assertions on the result of <paramref name="valueExpression"/>.
/// Asserts that the result of <paramref name="valueExpression"/> is not `null`.
/// </summary>
public static Assertable <T> HasValue <T>(Expression <Func <T> > valueExpression)
where T : class
{
if (valueExpression == null)
{
throw new ArgumentNullException(nameof(valueExpression));
}
var(value, message) = GetValueOrNullMessage(valueExpression, s_emptyContext);
if (message != null)
{
TestFrameworkProvider.Fail(message);
return(Assertable <T> .NoOp());
}
return(Assertable <T> .FromValueExpression(value, valueExpression.Body));
}