Skip to main content

Junit - Test fails on French or German string assertion

In my previous post about building a regex to check a text without special characters but allow German and French. I met a problem that the unit test works fine on my machine using Eclipse, but it was fail when running on Jenkins' build job.

Here is my test:

@Test
public void shouldAllowFrenchAndGermanCharacters(){
  String source = "ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ"; 
  assertFalse(SpecialCharactersUtils.isExistSpecialCharater(source));
}

Production code:

public static boolean isExistNotAllowedCharacters(String source){  
  Pattern regex = Pattern.compile("^[a-zA-Z_0-9_ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ]*$");  
  Matcher matcher = regex.matcher(source);  
  return !matcher.matches();  
 } 

The result likes the following:
 
Failed tests:
   SpecialCharactersUtilsTest.shouldAllowFrenchAndGermanCharacters:32 null

A guy from stackoverflow.com says:

"This is probably due to the default encoding used for your Java source files. The ö in the string literal in the JUnit source code is probably being converted to something else when the test is compiled. To avoid this, use Unicode escapes (\uxxxx) in the string literals in your JUnit source code"

So, I tried to find what and where exactly  the \uxxxx is. The answer they are Unicode character codes, and they could be easy to find. The following is an example:

https://en.wikipedia.org/wiki/List_of_Unicode_characters

I changed the function to use Unicode characters instead:

public static boolean isExistSpecialCharater(String source){
 Pattern regex = Pattern.compile("^[a-zA-Z_0-9_\u00c4\u00e4\u00d6\u00f6\u00dc\u00fc\u00df\u00e0\u00c0\u00e1\u00c1\u00e2\u00c2\u00e9\u00c9\u00e8\u00c8\u00ea\u00ca\u00ee\u00ce\u00e7\u00c7\u0020\u0027]*$");
 Matcher matcher = regex.matcher(source);
 return !matcher.matches();
  
} 

And, modified the test case also:

@Test
public void shouldAllowFrenchCharacters(){
   String source = "\u00e0\u00c0\u00e1\u00c1\u00e2\u00c2\u00e9\u00c9\u00e8\u00c8\u00ea\u00ca\u00ee\u00ce\u00e7\u00c7\u0020\u0027"; 
   assertFalse(SpecialCharactersUtils.isExistSpecialCharater(source));
}

Yeah, it works. Besides, I have already made it by writing an automation test with Selenium to make sure that it can also work on GUI as my expectation.

References:
[1]. http://stackoverflow.com/questions/4237581/comparing-unicode-characters-in-junit
[2]. http://www.widecodes.com/0zxqPkPkej/junit-fails-on-french-string-assertion.html

Comments

  1. By using Jenkins job, the Unicode character codes should be lower case all characters in Java code. for example: use '\u00e0' instead of '\u00E0'

    ReplyDelete
    Replies
    1. Delete please, i already posted

      Delete
    2. Thanks a lot. but, I won't. hehe

      Delete
  2. it just work when You use lower case for all special character. for ex: \u00E0 will not work

    ReplyDelete
  3. You can use this tool to convert from unicode to hex:
    http://www.endmemo.com/unicode/unicodeconverter.php

    ReplyDelete

Post a Comment

Popular posts from this blog

Small Changes to Java 7 via Project Coin and Why They are Useful

Did you know how new features were added into Java 7? The following are functionalities that can be considered.
Source: [1] Project Coin is all about the changes in the range from syntactic sugar to new language feature. This is what we're talking about today.

Since Java 7 is the first version developed in an open source manner, there is an amount of actions that must be performed for any changes as follows:
Update the Java Language Specification (JSL)Implement a prototype in the source compilerAdd library support essential for the changeWrite tests and examplesUpdate documentEtc, ... Project Coin has submitted a lot of proposals (almost 70) but only some of them are chosen to Java 7. Why? Briefly, Java is a rich static type system and it has a lot of possible interaction points between different bits of it. Making changes to this type system is prone to creating unexpected surprises.

Wow! It is tough, right? Let's take a look what features Project Coin brought to Java 7.
Strings…

Review - The Object-Oriented Thought Process, by Matt Weisfeld

In this post, I would like to point out what I understood after closing my eyes and thinking about what  exactly I have learned from this book. That means the layout of content does not follow the book.
From Procedural to Object Oriented Once upon a time, there is an issue that it is very hard to test and debug in Procedural programming because the data is sometimes global and can be modified by multiple functions.

Object-Oriented (OO) programming addresses these problems by combining both data and functions into an object. That means only functions belong to the object can access its own data.

Let us check the below two different approaches for a case that we want to transfer information between clients and servers across a network.

-    Procedural programming: a client (browser) transfers a JSON data to a server which needs to know how to process with this data. In order words, a handshaking agreement must be defined for the client and server in order to work together.
-    OO prog…

Climbing Fansipan – Highest Peak of Indochina

Fansipan is a mountain in Vietnam, the highest in Indochina, at 3,143 metres. It is located in the Lào Cai Province of the Northwest region of Vietnam, 9 km southwest of Sa Pa Township in the Hoang Lien Son mountain range. Wikipedia
Currently you can get the peak by cable car; however, I loved to explore it by climbing.

Here are what I have learned from this exciting journey. 💪
Do not procrastinate I have had no experience of climbing a high mountain before. Then, I've sought advice from my friends, but they suggested that I should not make it at that time due to bad weather and lack of experience. I know it never come true unless I just make my decision. Can't wait! Prepare for your journey You firstly need getting to know about the journey, schedule, transportation, etc. Recommended sources: YouTube videos, blog posts and tour companies websites.
Tips - Quality hiking shoes helps a lot - Bring your stuffs as light as possible. Important stuffs: a light raincoat and water (t…

Strategy Design Pattern

For example, I have an program with an Animal abstract class and two sub-classes Dog and Bird. I want to add a new behavior for the class Animal, this is "fly".  Now, I face to two approaches to solve this issue:

1. Adding an abstract method "fly" into the class Animal. Then, I force the sub-classes should be implemented this method, something like:

public abstract class Animal{ //bla bla public abstract void fly(); } public class Bird extends Animal{ //bla bla public void fly(){ System.out.println("Fly high"); } } public class Dog extends Animal{ //bla bla public void fly(){ System.out.println("Cant fly"); } }
2. Creating an interfaces with method "fly" inside. The same issue to abstract class, I force the classes these implement this interface should have a method "fly" inside:

public interface Flyable{ public void fly(); } public class Bird implements Flyable{ //bla bla public void fly(){ System.out.println…

Java Core - Top 10 Questions Every Developer Should Know

#RandomlyPickedByMe

What is the difference between Javascript and Java?Difference between StringBuilder and StringBuffer?Why do I get "SomeType@a3fde" when I print my code?Why is String immutable?Why "equals" method when we have "==" operator?Is List<Dog> a subclass of List<Animal>?Why shouldn't we use raw type?Is Java “pass-by-reference” or “pass-by-value”?What's the advantage of a Java enum versus a class with public static final fields?Why "double x = 0.1 + 0.2" and result of print(x) is 0.30000000000000004?
1. What is the difference between Javascript and Java? Holy crap! (Vietnamese: Thế quái nào lại có câu hỏi ngớ ngẩn vậy chứ?)

"Java and Javascript are similar like Car and Carpet are similar." - Greg Hewgill (on StackOverflow)
2. Difference between StringBuilder and StringBuffer String is immutable. StringBuilder and StringBuffer are mutable. StringBuffer is thread-safe. StringBuilder is modern than StringBuff…