Experiment two Java object-oriented programming

First, the purpose of the experiment

1. Initial mastery of unit testing and TDD

2. Understanding and mastering the object-oriented three elements: encapsulation, inheritance, polymorphism

3. Initial mastery of UML modeling

4. Familiarity with S.O.L.I.D principles

5. Understanding Design Patterns

Ii. contents of the experiment

(a) Unit testing

Pseudo-code: independent of the specific programming language, is the most natural product code, the best comment.

Product Code

Test code

Experimental steps:

In a myutil class to solve a percentile score into "excellent, good, medium, pass, fail" five Grade system performance function

The first step: write the percentile five-point pseudo-code as follows:

If the score is less than 60, turn into "fail"

If the score is between 60 and 70, turn into "pass"

If the score is between 70 and 80, turn into "medium"

If the score is between 80 and 90, turn into "good"

If the score is between 90 and 100, turn into "good"

Other, turn into "error"

The second step: write the test code (including test boundary values and exceptions) as follows:

The third step: write the product code as follows:

Run it and if you find that the error improves the product code according to the error, the operation succeeds.

From the above, the TDD method has successfully implemented the product code

Experiment two Java object-oriented programming