public void IfNull_WithTarget_DoNotCallFuncTR_ReturnOtherTypeNull()
{
var target = new SomeTestClass();
SomeOtherTestClass rtn = target.IfNull(() => new SomeOtherTestClass());
Assert.IsNull(rtn);
}
public void IfNull_WithNullTarget_CallFuncTR_ReturnOtherType()
{
var target = default(SomeTestClass);
SomeOtherTestClass rtn = target.IfNull(() => new SomeOtherTestClass());
Assert.IsNotNull(rtn);
}
public void IfNotNull_WithTarget_CallFuncTTR_ReturnOtherType()
{
var target = new SomeTestClass();
SomeOtherTestClass otherRtn = target.IfNotNull(x => new SomeOtherTestClass());
Assert.IsNotNull(otherRtn);
}
public void IfNotNull_WithTarget_CallFuncTR_ReturnOtherType()
{
var target = new SomeTestClass();
// Do not call Func<TR>(), return default(TR)
SomeOtherTestClass otherRtn = target.IfNotNull(() => new SomeOtherTestClass());
Assert.IsNotNull(otherRtn);
}
public void IfNotNull_WithNullTarget_DoNotCallFuncTTR_ReturnOtherTypeNull()
{
var target = default(SomeTestClass);
// Do not call Func<T,TR>(), return default(TR)
SomeOtherTestClass otherRtn = target.IfNotNull(x => new SomeOtherTestClass());
Assert.IsNull(otherRtn);
}
public void IfNull_WithNullTarget_CallAction_ReturnSameType()
{
var target = default(SomeTestClass);
var targetOther = new SomeOtherTestClass();
var rtn = target.IfNull(() => targetOther.OtherMethodReturnVoid());
Assert.AreSame(rtn, target);
Assert.IsTrue(targetOther.SomeMethodCalled);
}
public void WorkingSamples()
{
var notNullType = new SomeTestClass();
var nullType = default(SomeTestClass);
var action1 = new Action(() => { });
var action2 = new Action(() => { });
//
// I think the null comparison everywhere is a bit of noise.
// Below find some samples for null comparison that compresses the code a few lines.
//
// ---------------------------------------------
// Basic null comparision
// ---------------------------------------------
if (nullType == null)
{
action1();
}
// Less noisy (I think)
if (nullType.IsNull())
{
action1();
}
if (nullType.IsNotNull())
{
action2();
}
// ---------------------------------------------
// Else samples
// ---------------------------------------------
if (nullType == null)
{
action1();
}
else
{
action2();
}
// Replace with
nullType
.IfNull(action1)
.IfNotNull(action2);
// ---------------------------------------------
// Avoid null intances
// ---------------------------------------------
var someNullType = default(SomeTestClass);
if (someNullType == null)
{
someNullType = new SomeTestClass();
}
someNullType.MethodReturnVoid();
// Replace with
notNullType
.IfNull(() => new SomeTestClass())
.MethodReturnVoid();
// ---------------------------------------------
// Retrning the same type
// ---------------------------------------------
someNullType = default(SomeTestClass);
if (someNullType == null)
{
someNullType = new SomeTestClass();
}
someNullType.MethodReturnVoid();
var otherType = new SomeOtherTestClass();
otherType.OtherMethodReturnVoid();
// Replace with
notNullType
.IfNull(() => new SomeTestClass())
.Do(x => x.MethodReturnVoid())
.Do(x => new SomeOtherTestClass())
.OtherMethodReturnVoid();
// ---------------------------------------------
// IEnumerable Samples
// ---------------------------------------------
IEnumerable <SomeTestClass> sequenceFull = new SomeTestClass[] { new SomeTestClass(), new SomeTestClass(), };
IEnumerable <SomeOtherTestClass> otherSequenceFull = new SomeOtherTestClass[] { new SomeOtherTestClass(), new SomeOtherTestClass(), };
sequenceFull
.ForEachItem(x => x.MethodReturnVoid())
.Select(element => new { AnonymousBool = element.SomeMethodCalled })
.Where(element => !element.AnonymousBool)
.Do(enumerable => Console.WriteLine("Items in Collection: {0}", enumerable.Count()))
.IfEnumEmpty(() => sequenceFull)
.ForEachItem(element => element.MethodReturnVoid())
.Do(enumerable => Console.WriteLine("Items in Collection: {0}", enumerable.Count()))
;
// ---------------------------------------------
// String Samples
// ---------------------------------------------
var nullStr = default(string);
var strAction1 = new Action <string>(x => { });
var strAction2 = new Action <string>(x => { });
if (nullStr == null)
{
action1();
}
else
{
action2();
}
// simple
if (nullStr.IsEmpty())
{
action1();
}
else
{
action2();
}
// Replace (no much diffrencr but easier on the eyes)
nullStr
.IfEmpty(action1)
.IfNotEmpty(strAction2);
// Replace with assurance there will be a string
nullStr
.IfEmpty(() => "new string")
.Do(x => strAction1(x));
// ---------------------------------------------
// String Samples - Compare strings
// ---------------------------------------------
var strOne = "strOne";
var strone = "strone";
//var strTwo = "strOne";
// Strings are different
if (strone.Equals(strOne))
{
Assert.Fail();
}
// Replace with Case insenitive extension
if (strone.IsNotEqualTo(strOne))
{
Assert.Fail();
}
// More Compressed
//strone.IfNotEqual(strOne, (X500DistinguishedName, y) => { });
}
