public void ShouldCreateSimpleFunc_New_MethodCall()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, int>> expression = x => new Customer().CalculateAge();
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(33);
reflectionResult.Should().Be(33);
}
public void ShouldCreateSimpleFunc_New()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, Customer>> expression = x => new Customer();
Console.WriteLine(expression.ToString());
// Act
Func<Customer, Customer> emit = expression.Compile();
Func<Customer, Customer> reflection = expression.Reflect();
Customer emitResult = emit.Invoke(customer);
Customer reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().NotBeNull();
reflectionResult.Should().NotBeNull();
}
public void ShouldCreateSimpleFunc_ExtMethodCall_Constant()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, int>> expression = x => x.GetDefaultAgeEx(20);
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(53);
reflectionResult.Should().Be(53);
reflectionResult.Should().Be(emitResult);
}
public void ShouldExecuteOperator_ArrayLength()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, int>> expression = x => x.Names.Length;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(2);
reflectionResult.Should().Be(2);
reflectionResult.Should().Be(emitResult);
}
public void ShouldExecuteOperator_Convert()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, string>> expression = x => x.Firstname + "-" + 50;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("John-50");
reflectionResult.Should().Be("John-50");
reflectionResult.Should().Be(emitResult);
}
public void ShouldExecuteOperator_Not()
{
// Arrange
Customer customer = new Customer("John", "Doe") { IsPremium = true };
Expression<Func<Customer, bool>> expression = x => !x.IsPremium;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, bool> emit = expression.Compile();
Func<Customer, bool> reflection = expression.Reflect();
bool emitResult = emit.Invoke(customer);
bool reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().BeFalse();
reflectionResult.Should().BeFalse();
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_ArrayAccess()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, string>> expression = x => x.Names[1];
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("Doe");
reflectionResult.Should().Be("Doe");
reflectionResult.Should().Be(emitResult);
}
public void ShouldExecuteConditional()
{
// Arrange
Customer customer = new Customer("John", "Doe") { IsPremium = true };
Expression<Func<Customer, int>> expression = x => x.IsPremium ? 500 : 300;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(500);
reflectionResult.Should().Be(500);
reflectionResult.Should().Be(emitResult);
}
public void ShouldExecuteOperator_TypeIs()
{
// Arrange
Customer customer = new Customer("John", "Doe");
#pragma warning disable 183
Expression<Func<Customer, bool>> expression = x => x is Customer;
#pragma warning restore 183
Console.WriteLine(expression.ToString());
// Act
Func<Customer, bool> emit = expression.Compile();
Func<Customer, bool> reflection = expression.Reflect();
bool emitResult = emit.Invoke(customer);
bool reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().BeTrue();
reflectionResult.Should().BeTrue();
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_ArrayAccess_Delegate_CallingInvoke()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Func<string[]> func = () => new string[]
{
"One", "Two"
};
Expression<Func<Customer, string>> expression = x => func.Invoke()[0];
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("One");
reflectionResult.Should().Be("One");
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_ListInitializer()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, IList<string>>> expression = x => new List<string>
{
"Hello",
"World"
};
Console.WriteLine(expression.ToString());
// Act
Func<Customer, IList<string>> emit = expression.Compile();
Func<Customer, IList<string>> reflection = expression.Reflect();
IList<string> emitResult = emit.Invoke(customer);
IList<string> reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Count.Should().Be(2);
emitResult[0].Should().Be("Hello");
reflectionResult.Count.Should().Be(2);
reflectionResult[0].Should().Be("Hello");
}
public void ShouldExecuteOperator_TypeAs()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, Customer>> expression = x => x.Object as Customer;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, Customer> emit = expression.Compile();
Func<Customer, Customer> reflection = expression.Reflect();
Customer emitResult = emit.Invoke(customer);
Customer reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(null);
reflectionResult.Should().Be(null);
reflectionResult.Should().Be(emitResult);
}
public int Calculate(Customer customer)
{
return this.CalculateAge() + customer.CalculationValue;
}
public int CalculateLength(string str, Customer customer, int value)
{
return str.Length + customer.CalculationValue + value;
}
public Customer(Customer toCopy)
{
this.calculationValue = toCopy.CalculationValue;
this.Firstname = toCopy.Firstname;
this.Lastname = toCopy.Lastname;
}
public void ShouldCreateSimpleFunc_PropertyGetter_MethodCall()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, string>> expression = x => x.Firstname.ToLower();
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("john");
reflectionResult.Should().Be("john");
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_PropertyGetter_UnaryExpression()
{
// Arrange
Customer customer = new Customer("John", "Doe");
int arg = 10;
Expression<Func<Customer, int>> expression = x => -arg;
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(-10);
reflectionResult.Should().Be(-10);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_CreateNewArray_Bounds()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, string[]>> expression = x => new string[12];
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string[]> emit = expression.Compile();
Func<Customer, string[]> reflection = expression.Reflect();
string[] emitResult = emit.Invoke(customer);
string[] reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Length.Should().Be(12);
reflectionResult.Length.Should().Be(12);
reflectionResult.Length.Should().Be(emitResult.Length);
}
public Customer(string firstname, Customer customer, int amount, string lastname)
{
this.Firstname = firstname;
this.Lastname = lastname;
this.calculationValue = customer.CalculateAge() + amount;
}
public void ShouldCreateSimpleFunc_MethodCall_WithExpressionParameters_NestedNew()
{
// Arrange
Customer customer = new Customer("John", "Doe");
int value = 666;
Expression<Func<Customer, int>> expression = x => x.Calculate(new Customer(value));
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(699);
reflectionResult.Should().Be(699);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_MethodCall_WithExpressionParameters_BinaryExpression_ConstantExpression()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, int>> expression = x => x.Calculate(x.Age + 100);
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(166);
reflectionResult.Should().Be(166);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_Indexer_MultipleParameters()
{
// Arrange
Customer customer = new Customer("John", "Doe");
int arg = 5;
Expression<Func<Customer, int>> expression = x => x[2, arg];
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(40);
reflectionResult.Should().Be(40);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_Delegate_CallingMethod()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Func<string> func = () => "Hello";
Expression<Func<Customer, string>> expression = x => func().ToLower();
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("hello");
reflectionResult.Should().Be("hello");
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_Delegate_CallingMethod_WithParameter()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Func<string, string> func = x => "hello " + x;
string s = "test";
Expression<Func<Customer, string>> expression = x => func(s).Trim('h', 't');
Console.WriteLine(expression.ToString());
// Act
Func<Customer, string> emit = expression.Compile();
Func<Customer, string> reflection = expression.Reflect();
string emitResult = emit.Invoke(customer);
string reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be("ello tes");
reflectionResult.Should().Be("ello tes");
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_MethodCall_WithExpressionParameters_NestedDelegateCall_WithParameters_Local()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Func<int, int> method = x => x + 100;
int arg = 10;
Expression<Func<Customer, int>> expression = x => x.Calculate(method(arg));
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(143);
reflectionResult.Should().Be(143);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_ObjectInitializer_WithField()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, Customer>> expression = x => new Customer
{
Field = "SoylentGreen",
};
Console.WriteLine(expression.ToString());
// Act
Func<Customer, Customer> emit = expression.Compile();
Func<Customer, Customer> reflection = expression.Reflect();
Customer emitResult = emit.Invoke(customer);
Customer reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Field.Should().Be("SoylentGreen");
reflectionResult.Field.Should().Be("SoylentGreen");
}
public void ShouldCreateSimpleFunc_MethodCall_WithMixedParameters()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, int>> expression = x => x.CalculateLength(x.Firstname, x, 10);
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(14);
reflectionResult.Should().Be(14);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_PropertyGetter_BinaryExpression()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, bool>> expression = x => x.Firstname != "Jane";
Console.WriteLine(expression.ToString());
// Act
Func<Customer, bool> emit = expression.Compile();
Func<Customer, bool> reflection = expression.Reflect();
bool emitResult = emit.Invoke(customer);
bool reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().BeTrue();
reflectionResult.Should().BeTrue();
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_StaticMethodCall_Delegate()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Func<int> value = () => 20;
Expression<Func<Customer, int>> expression = x => Customer.GetDefaultAge(value());
Console.WriteLine(expression.ToString());
// Act
Func<Customer, int> emit = expression.Compile();
Func<Customer, int> reflection = expression.Reflect();
int emitResult = emit.Invoke(customer);
int reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be(53);
reflectionResult.Should().Be(53);
reflectionResult.Should().Be(emitResult);
}
public void ShouldCreateSimpleFunc_PropertyGetter_Indexer()
{
// Arrange
Customer customer = new Customer("John", "Doe");
Expression<Func<Customer, char>> expression = x => x.Firstname[0];
Console.WriteLine(expression.ToString());
// Act
Func<Customer, char> emit = expression.Compile();
Func<Customer, char> reflection = expression.Reflect();
char emitResult = emit.Invoke(customer);
char reflectionResult = reflection.Invoke(customer);
// Assert
emitResult.Should().Be('J');
reflectionResult.Should().Be('J');
reflectionResult.Should().Be(emitResult);
}
