public void AreEqual <T>(Expression <Func <T> > propertyExpression, T expectedValue)
{
if (propertyExpression == null)
{
throw new ArgumentNullException(nameof(propertyExpression));
}
var expressionPath = ExpressionPath.Create(propertyExpression.Body);
var actualValue = (T)(expressionPath.Result);
if (!EqualityComparer <T> .Default.Equals(actualValue, expectedValue))
{
var message = string.Format(ToStringFormatter, NotEqualMessagePattern, _pathManager.GetPath(expressionPath), expectedValue, actualValue);
Assert.Fail(message);
}
}
public void IsNotNull <T>(Expression <Func <T> > propertyExpression) where T : class
{
if (propertyExpression == null)
{
throw new ArgumentNullException(nameof(propertyExpression));
}
var expressionPath = ExpressionPath.Create(propertyExpression.Body);
var actualValue = (T)(expressionPath.Result);
if (actualValue == null)
{
var message = string.Format(ToStringFormatter, IsNullPattern, _pathManager.GetPath(expressionPath));
Assert.Fail(message);
}
}
public T StepInto <T>(Expression <Func <T> > propertyExpression, bool assertNotNull = true)
{
if (propertyExpression == null)
{
throw new ArgumentNullException(nameof(propertyExpression));
}
_pathManager.Add(ExpressionPath.Create(propertyExpression.Body));
var result = (T)_pathManager.Result;
if (assertNotNull && EqualityComparer <T> .Default.Equals(result, default(T)))
{
Assert.Fail(IsNullPattern, _pathManager.GetPath(null));
}
return(result);
}