public void TestDecrement_SubtractThe1_MustNotReplaceWithDecrement()
{
Expression <Func <int, int> > sourceExpression = i => i - 2;
var notExpectedExpression = Expression.Lambda(typeof(Func <int, int>), Expression.Increment(_intParameter), _intParameter);
var actualExpression = new ReplaceVisitor().VisitAndConvert(sourceExpression, string.Empty);
Assert.NotEqual(notExpectedExpression.ToString(), actualExpression.ToString()); //replace with real comparison
Assert.Equal(sourceExpression.ToString(), actualExpression.ToString()); //replace with real comparison
AssertExpressionsResults((Func <int, int>)sourceExpression.Compile(), (Func <int, int>)actualExpression.Compile(), testParameters);
}
public void TestDecrement_Subtract1From1_MustReplaceWithDecrement()
{
Expression <Func <int, int> > sourceExpression = i => ((i - 2) + (i - 1)) + ((1 + i) - 1);
var expectedExpression = Expression.Lambda(typeof(Func <int, int>),
Expression.Add(
Expression.Add(
Expression.Subtract(_intParameter, Expression.Constant(2)),
Expression.Decrement(_intParameter)
),
Expression.Decrement(
Expression.Increment(_intParameter)
)
),
_intParameter);
var actualExpression = new ReplaceVisitor().VisitAndConvert(sourceExpression, string.Empty);
Assert.NotEqual(sourceExpression.ToString(), actualExpression.ToString()); //replace with real comparison
Assert.Equal(expectedExpression.ToString(), actualExpression.ToString()); //replace with real comparison
AssertExpressionsResults((Func <int, int>)expectedExpression.Compile(), (Func <int, int>)actualExpression.Compile(), testParameters);
}
public void TestIncrement_Add1Before_MustReplaceWithIncrement()
{
Expression <Func <int, int> > sourceExpression = i => 1 + i;
var expectedExpression = Expression.Lambda(typeof(Func <int, int>), Expression.Increment(_intParameter), _intParameter);
var actualExpression = new ReplaceVisitor().VisitAndConvert(sourceExpression, string.Empty);
Assert.Equal(expectedExpression.ToString(), actualExpression.ToString()); //replace with real comparison
AssertExpressionsResults((Func <int, int>)expectedExpression.Compile(), (Func <int, int>)actualExpression.Compile(), testParameters);
}