public void PropertyAndExplisitCastChain_InvalidCast()
{
// Arange
var employee = new Employee { Person = new Person { Pet = new Cat() } };
// Act
var result = employee.NullSafeChain(x => ((Dog)x.Person.Pet).Collar);
}
public void PropertyAndMethodCallChain_CallMethodWithParam_TheMethodReturnsNull()
{
// Arange
var employee = new Employee { Manages = { new Employee { Person = new Person { Pet = new Cat() }, Name = "john" } } };
// Act
var result = employee.NullSafeChain(x => x.GetEmployeeByName("Jain").Person);
// Assert
Assert.Null(result);
}
public void PropertyAndMethodCallChain_CallExtensionMethod_TheMethodReturnsNull()
{
// Arange
var employee = new Employee();
// Act
var result = employee.NullSafeChain(x => x.Manages.FirstOrDefault().Person);
// Assert
Assert.Null(result);
}
public void PropertyAndMethodCallChain_CallExtensionMethod_GetTheLastElement()
{
// Arange
var employee = new Employee { Manages = { new Employee { Person = new Person { Pet = new Cat() } } } };
// Act
var result = employee.NullSafeChain(x => x.Manages.FirstOrDefault().Person);
// Assert
Assert.NotNull(result);
}
public void PropertyAndExplisitCastChain_GetTheLastElement()
{
// Arange
var employee = new Employee { Person = new Person { Pet = new Dog { Collar = new Collar() } } };
// Act
var result = employee.NullSafeChain(x => ((Dog)x.Person.Pet).Collar);
// Assert
Assert.NotNull(result);
}
public void PropertyAndMethodCallChain_CallMethod_GetTheLastElement()
{
// Arange
var employee = new Employee { Manages = { new Employee { Person = new Person { Pet = new Cat() }, Name = "Jain" } } };
// Act
var result = employee.NullSafeChain(x => x.GetFirstEmployee().Person);
// Assert
Assert.NotNull(result);
}
public void PropertyChain_TheThirdElementIsNull()
{
// Arange
var employee = new Employee { Person = new Person() };
// Act
var result = employee.NullSafeChain(x => x.Person.Address.City);
// Assert
Assert.Null(result);
}
public void PropertyChain_GetTheLastElement()
{
// Arange
var employee = new Employee { Person = new Person { Address = new Address { City = new City() } } };
// Act
var result = employee.NullSafeChain(x => x.Person.Address.City);
// Assert
Assert.NotNull(result);
}
public void PropertyAndTypeAsCastChain_TheAsReturnsNull()
{
// Arange
var employee = new Employee { Person = new Person { Pet = new Cat() } };
// Act
var result = employee.NullSafeChain(x => (x.Person.Pet as Dog).Collar);
// Assert
Assert.Null(result);
}
public void PropertyAndMethodCallChain_CallMethod_TheMethodReturnsNull()
{
// Arange
var employee = new Employee();
// Act
var result = employee.NullSafeChain(x => x.GetFirstEmployee().Person);
// Assert
Assert.Null(result);
}