README.md

Mutators

Stryker supports a variety of mutators, which are listed below. Do you have a suggestion for a (new) mutator? Feel free to create an issue!

• Arithmetic Operators
• Equality Operators
• Boolean Literals
• Assignment statements
• Unary Operators
• Update Operators
• Checked Statements
• Linq Methods
• String Literals

Arithmetic Operators

Original	Mutated
+	-
-	+
*	/
/	*
%	*

Equality Operators

Original	Mutated
>	<
>	>=
>=	<
>=	>
<	>
<	<=
<=	>
<=	<
==	!=
!=	==

Logical Operators

Original	Mutated
&&	||
||	&&

Boolean Literals

Original	Mutated
true	false
false	true
!

Assignment Statements

Original	Mutated
+=	-=
-=	+=
*=	/=
/=	*=
%=	*=
<<=	>>=
>>=	<<=
&=	|=
|=	&=

Unary Operators

Original	Mutated
-variable	+variable
+variable	-variable
~variable	variable

Update Operators

Original	Mutated
variable++	variable--
variable--	variable++
++variable	--variable
--variable	++variable

Checked Statements

Original	Mutated
checked(2 + 4)	2 + 4

Linq Methods

Original	Mutated
Distinct()
Reverse()
OrderBy()
OrderByDescending()
SingleOrDefault()	FirstOrDefault()
FirstOrDefault()	SingleOrDefault()
First()	Last()
Last()	First()
All()	Any()
Any()	All()
Skip()	Take()
Take()	Skip()
SkipWhile()	TakeWhile()
TakeWhile()	SkipWhile()
Min()	Max()
Max()	Min()
Sum()	Count()
Count()	Sum()

String Literals

Original	Mutated
"foo"	""
""	"Stryker was here!"
$"foo {bar}"	$""
@"foo"	@""