Questions tagged [junit]
JUnit is a unit testing framework for the Java language.
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IPv4 filter in Java
I have a simple class for representing IPv4-addresses via int values, and a simple IP-address filter that works like a set of IPv4-addresses.
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votes
1
answer
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Basic Ticket booking code with Unit tests
I am going to run a session for a few other developers who are new to Junit, mocking, etc.
I have designed a very simple application with classes and tests to demonstrate how to do unit testing. ...
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vote
1
answer
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Binary Search tree, leaves method [closed]
I have written a code of Binary Search tree that extends comparable and implements an interface. The code for leaves and the helper method countLeaves, makes sure that all of the test goes through ...
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votes
1
answer
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HashTable Implementation with JUNIT testing
I have written a hashtable that implements a set interface. With JUNIT all my test goes through, however I am unsure if they are written correctly based on what their description is. Down here I have ...
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2
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Hungarian algorithm for optimal assignment
The assignment problem is about assigning tasks to workers, where each pair (worker, task) has a cost. The Hungarian algorithm builds an optimal solution for this problem. It has two variants, ...
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Testing DAO Delete User
I have several Dao classes, including a UserDao, below. The DAOs have many methods, but I'm focussing on deleteUser:
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2
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844
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Need Feedback on JUnit test comparing two timestamps
I am writng a JUnit test case for the below methods :
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4
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2
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Are these Unit tests OK or am I implementing an antipattern or not following best practices
I am testing a Spring boot service using JUnit 5 and Mockito. I haven't spent much time on unit testing in the past so I'm not sure if I'm accidentally implementing an anti-pattern or not following ...
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0
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Migrate customer and transaction data from CSV to MongoDB
I wrote a Java Spring Boot application with MongoDB that on every application start loads customer, account type and transaction details from CSV files to MongoDB. It has one end point that returns ...
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2
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Palindrome Algorithm and JUnit 5 Tests
I have a "Palindrome" class that has some functions for verifying if certain things are Palindromes. For the verification, I have 2 different algorithms, one being recursive and the other ...
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1
answer
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Proper way to unit test MD5 Hashing of Zip Files from URL using JUnit 5?
Am using Java 1.8 and JUnit 5 to test a program which I wrote which grabs external zip files from a public url and then converts them into MD5 based hashes.
This post / question serves as not only a ...
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2
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Unit testing Roman-Arabic-Roman numeric converter
As you can see here, I wrote the methods public static int romanToArabic(String number) and ...
user214772
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3
answers
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Mars Rover technical Challenge in OOP
I am trying to practice OOP and TDD concepts,
I have written this code for Mars rover challenge from
marsrovertechchallenge .
Can you please review my code from my GitHub repository?
Or you can ...
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5
answers
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Find most "academic" implementation of doubly linked list
Recently, a company has asked me to make an implementation of a doubly linked list with unity tests to test my skills. In the task description they specified that the solution should be as academic as ...
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0
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Android+Firebase testing using Mockito
I have an interactor/usecase class in my application. My application follows MVVM architecture with interactor/usecases responsible for logic (e.g. get data from api-service, store in local-database ...
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2
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Two BDD unit tests for an account repository with identical code
I am testing my repository class:
interface AccountRepository{
void save(Account account);
Optional<Account> findById(Long id);
}
And when writing ...
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2
votes
1
answer
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Testing a probabilistic prime-testing algorithm that may fail
I have implemented Pollard's Rho algorithm in Java. Due to the nature of it there is a small chance for it to fail (have not seen it happening yet).
Since I do not ...
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1
answer
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Unit Testing for Spring Controller
This is my first attempt to do unit test for one of my controllers.
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1
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1k
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Assert LinkedHashMap element in jUnit test [closed]
So I have some test, maybe the given side of that test is not so important to catch the point of my confusion. I wrote
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1
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1
answer
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Bowling kata solution in java
This is my first bowling kata solution in java. I would be very grateful if you say something about that. I want to learn from you to become a better programmer.
I think the score method is quite ...
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Unit test for class converting between DTOs and entities
Is this correctly written test? Tested class is responsible for converting from dto to entity class and i wanted to test it. Are these tests useful and well designed? I have a problem understanding ...
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votes
1
answer
1k
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Dropbox Java Spring Boot connector
I've created a service that connects to Dropbox and makes it possible to download and upload files, create and list folders and remove file or folder.
Full code is available on GitHub: https://github....
0
votes
1
answer
393
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Development Junit test notification
I'm in the development phase of a Test class to test send notifications :
1- SMS (send SMS using phone number )
2- Email (send email )
3- WebSocket (send websocket )
This is the first time I have ...
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3
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Fizz Buzz Test Driven Development
Task:
Create the Fizz Buzz game using Test Driven Developoment. Print the correct word for range 1-100.
The implementation:
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3
votes
1
answer
840
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HL7 message builder and unit tests
I had to code a project due to my final exams in April. It is an application which simulates a hospital. There are admissions, transfers and discharges of patients in this hospital. For each of those,...
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1
answer
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Given a sorted (increasing order) array, write an algorithm to create a binary tree with minimal height
I'm trying to find the complexity of this code and some suggestions for improving the code quality. and handling the code gracefully, esp in the areas of exception handling, checking edge cases, ...
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Espresso tests that check if Snackbar is displayed and if there is an internet connection
I have recently began writing tests for Android using the espresso library.
Here I have three tests.
The first test is to check if a snackbar appears when searching with blank text.
The second is a ...
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vote
2
answers
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Given a binary search tree and a level, calculate the number of nodes at that level
The problem statement is in the title. If the given tree is empty, -1 is returned. If the tree has k levels, and the given level is m, and m > k, -2 is returned. If neither of these conditions is met, ...
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2
votes
2
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Custom Hamcrest matcher to compare maps
I am new to Java and have written a custom matcher to compare two maps because the error message from either JUnit or Hamcrest is not detailed enough. The code I ...
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4
answers
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Getting max and min values from Array
My code works; I am just seeing if there's an optimized way to write these methods or even better perhaps combine them (since majority of their contents look similar).
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votes
1
answer
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Mock Entity or DTO for unit tests [closed]
Is this good approach, to mock some domain object, for example javax.persistence.Entity, or DTO (data transfer object)? Below is ...
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votes
1
answer
620
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Quarantine implementation
I have an assignment to implemented a Quarantine project where I was left with the some unit tests and a skeleton of the implementation. I provided the solution below and get rejected from the ...
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1
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Given a binary search tree determine if it's complete and if it's full
Here is the code of my binary search tree and a few unit tests.
BinarySearchTree
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10
votes
3
answers
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Table Driven Test in Java using Junit4
I was creating some solving algorithm and write test for it. this is the tests :
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votes
1
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162
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Testing the Dutch national flag task
I recently coded the Dutch national flag problem in Java and wrote some tests.
The array in zero-indexed.
Please take a look at how I verify that elements of the output array are in the right order. ...
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9
votes
1
answer
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Percolation Model
Newbie here, presenting the code for close public scrutiny.
Couple remarks regarding the context (taken from Princeton's COS 226 course):
In this problem I model a percolation system using an N-by-...
user118482
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504
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Does this unit test cover all edge cases? [closed]
I want to test a simple controller and I want to know if this unit test covers all cases:
Controller:
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2
answers
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Rainfall challenge: how big are the basins?
August 2016 challenge
The Rainfall Challenge
Problem description is copied verbatim from the linked Code Review
question:
Problem Statement
A group of farmers has some ...
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3
votes
4
answers
661
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Unit testing for concatenating two int arrays
Using Java 1.8, I created the following implementation to concat two int arrays:
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1
answer
547
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Unit test code for a private median-of-three function, using reflection [closed]
A Junit test class is used to test the class LibraryCounter. Reflection was used to test the private methods. This made the code much more complicated.
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votes
1
answer
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Piece class as part of implementation for the Tetris game
Here is my Piece class as part of implementation for the Tetris game. If possible, I want my code to face the same level of scrutiny as actual production code.
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votes
1
answer
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Standard Test methods for checking values in Lists, Maps etc
I needed to check the values in various Lists and Maps. In my case, the various types of Objects that needed checking were of four types:
String
...
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3
votes
1
answer
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Unit tests for custom Map wrapper
A while ago I asked for a code review of my automatically keyed map and I have recently had the time to get around to writing some unit tests for it using JUnit4.
The test ensures that all of the "...
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3
votes
1
answer
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class Taboo<T> -- sort passed in List<T> according to 'rules'
I know as a matter of fact that there are many areas upon which my code could be improved. I was wondering if anyone can provide me with suggestions on how Taboo ...
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2
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Find items that appear the same number of times in two collections
Here is a Java collection puzzle I found online. I was wondering if anyone can provide me with suggestions on how Appearance and tests can be improved. Suggestions ...
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votes
1
answer
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Printing JUnit test results in file by changing and using the 'out' static variable of 'System' class
I'm building a framework for comparing files (in my own way) using JUnit. All test cases have been packaged in a JAR which is ran independently using a .bat file I ...
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votes
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Find number of plus in a 2d array
Problem
CharGrid
The CharGrid class encapsulates a 2-d char array with a couple operations.
int countPlus()
Look for a '+' pattern in the grid ...
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votes
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Determining if two Strings have common subtrings of a given length in Java
Problem:
Given 2 strings, consider all the substrings within them of length
len. Len will be 1 or more. Returns true if there are any such
substrings which appear in both strings. Compute this ...
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votes
2
answers
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Unit testing Equals, hashcode and comparator - asserting contracts
After reading Joshua Blosh's Effective Java 2nd edition, I decided to implement equals, hashcode and comparable(where applicable) to every class I have been implementing.
I have written a generic ...
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DoublingQueue in Java
Inspired by this CR question, I decided to create my own queue! If you guys see anything taboo or have any improvements, please let me know. Ultimately I want it to be feature rich and bug free, with ...
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