guess number kata

Unit Test Basics

Exercise description

A game of guessing numbers. The game has four grids, each grid has a number from 0 to 9, and the numbers of any two grids are different. You have 6 chances of guessing, if you guess correctly, you win, otherwise you lose. Each time you guess, you need to enter 4 numbers in sequence. The program will give feedback from xAxB based on the guessing situation. The numbers before A represent the number of positions and numbers, and the numbers before B represent the number of numbers with the right numbers but the wrong positions.

For example: the answer is 1 2 3 4, then for different inputs, there are the following outputs

Example :

The answer is 1 2 3 4, so for different inputs, there are the following outputs

 Input　　    Output             Instruction
1 5 6 7      1A0B                 1 correct
2 4 7 8      0A2B                 2 and 4 wrong position 
0 3 2 4      1A2B                 4 correct，2 and 3 wrong position
5 6 7 8      0A0B                 all wrong
4 3 2 1      0A4B                 4 numbers position wrong
1 2 3 4      4A0B                 win, all correct
1 1 2 3    Wrong Input，Input again
1 2        Wrong Input，Input again

The answer is generated randomly at the beginning of the game. There are only 6 chances to enter. At each guess, the program should give the results of the current guess, as well as all the previous guesses and the results for the player's reference. The input interface is a console (Console) to avoid too much interface code that is not related to the problem. When entering, separate the numbers with spaces.

Require:

• Design and write test cases
• Complete the tests in existing test files and ensure that the test coverage of the test classes tested in this test file is 100%.
• Unit tests should cover all core business logic
• Refactoring unit tests with small steps
• Name meaningful names for unit tests and methods
• Code is submitted in small steps and attached comments of meaning

Environmental Requirements

• Java 8

How to get started

• Clone template library
• Run Main.java file under src/main directory in the project
  • Guess Number Game, You have 6 chances to guess! appears, indicating that the project starts successfully
• Complete the corresponding unit test in the src/test directory in the project

How to test

• Execute ./gradlew clean test in the root directory to view the test results

Output specifications

• Complete the code and test of the requirements