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I’m sure you have seen classes that initialize a lot of objects in their constructor. These classes may be hard to test because of those object creations I mentioned. To get around this problem we use Extract and override factory method refactoring so...
Sometimes you are not able to use Extract Interface refactoring because interface of parameter may be too large or there may be no interface at all. You just have class to pass in and you are not able to fake it or extend it to get class testable. In...
In good code variables are used as short as possible. Often we can see code where variables are defined in wider scope than it is necessary. There are many examples about too wide scopes. One of fuzziest of them is variable that is defined in class scope...
In legacy code you may find classes with constructor where some objects are created and initialized. These classes are not easily testable because they depend on other classes and therefore when you unit test these classes they may also throw exceptions...
Extract interface is one of the most common refactoring techniques. Motivation behind extract interface refactoring method is to avoid direct dependencies between classes. Instead of using classes in method calls we use interfaces so we can also use subclasses...
One of the simplest refactoring methods is called Rename method . There are many reasons why one may want to change the name of some method. I think that main reason to rename a method is to give it a name that describes better what method is supposed...
One way to write messy code is to use constant values in code without any explanations about their values or purpose. Sometimes it feels like too small problem to think about, specially when there are only couple of constants, but I am sure that hard...
It is not a miracle that during coding developers produce code that is later not needed anymore. It is also not a miracle that unneeded code will stay in project files waiting for the day when somebody finds this code useful (again). But this far this...
You may discover sometimes that some of your classes have method you would like to use without creating new instance of that class. In this case we have to use expose static method refactoring to make this method static. Let’s say you have class called...
Extract method is one of the most popular refactoring method when dealing with legacy code . In legacy code we can often find methods that are very long. My favorite findings methods about 2000 lines of code. Cool, isn’t it? Those methods have usually...
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