public void GivenExpressionWithMultipleMatchingParameters_ThenReturnsThose()
{
// Arrange
var param1 =
Expression.Parameter(typeof(int), "number1");
var param2 =
Expression.Parameter(typeof(int), "number2");
var expression =
Expression.Equal(
Expression.Constant(2),
Expression.Add(
param1,
param2));
// Act
var parameters =
TypedParameterExpressionFinder
.OfType <int>(expression);
// Assert
parameters
.Should()
.BeEquivalentTo(param1, param2);
}
public void GivenExpressionWithMultipleNonMatchingParameters_ThenReturnsEmptyCollection()
{
// Arrange
var param1 =
Expression.Parameter(typeof(double), "number1");
var param2 =
Expression.Parameter(typeof(double), "number2");
var expression =
Expression.Equal(
Expression.Constant(2D),
Expression.Add(
param1,
param2));
// Act
var parameters =
TypedParameterExpressionFinder
.OfType <int>(expression);
// Assert
parameters
.Should()
.NotBeNull().And.BeEmpty();
}
public void GivenExpressionWithoutParameters_ThenReturnsEmptyCollection()
{
// Arrange
var expression =
Expression.Equal(
Expression.Constant(2),
Expression.Add(
Expression.Constant(1),
Expression.Constant(1)));
// Act
var parameters =
TypedParameterExpressionFinder
.OfType <int>(expression);
// Assert
parameters
.Should()
.NotBeNull().And.BeEmpty();
}
