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Ojects 2 Testing!! Overview.md

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Ojects 2 Testing!! Overview.md

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Objects 2 Testing!! Overview

  • Obj today: How do do testing in BlueJ

  • Class - describes a category or thing

    • Object - is an instance of a class and has its own settings
    • Object creates a blue print of the Class

Objects Instance:

  • Identity, State, & Behavior

  • Variables - Java is a strong type computer language * Primative data type (i.e. boo, variables, int) or Object reference (triangles, addressess, age)

    • Strongly type computer language has to 3 things that nees to be done
    • declare, initialize and Use
      • int total = O; - Declare & Initialize
      • total = 5584939 - Use
      • running total = time + distance - Use
    • Declare, Initialize & Use
      • Address (Class is always capitalize) address 1;
      • address1 = new Address();
      • currentPostalCode=address1.getPostalCode();
    • Null - when a class is undefined
      • Address address1; - Undefined class = Null
        • If a class has no mutator methods(such as String or LocalDate),
        • This can be useful if you dont yet have an object for date to refer to, or if you want to indicate a special situation, such as an unknown date.(Null can be used a place holder until you have a class)

  • Dotted line in BlueJ - Person --> Address

    • Embedded Class
    • Objects are like an index card, and in coding objects can contain string on each oject
    • Class locates the code that is working with it

Test Driven Development - TDD

  • is all about writing "clean code that works."
  • TDD grew out of Extreme Programming, most testing comes after the coding process or periodaclly during the coding process.
    • Gives you confidence that your code works correctly
    • helps you quickly find bugs
    • focuseses on the design task
    • helps you completely understand the requirements for your code
      • Helps with taking code from GitHub and applying it to your system
  • Unit test is not exhaustive - cannot cover all the codes, only covers percentage testing
    • can have more testing than coding

Unit Testing in BlueJ Demo - Test Staffing

  • Create a test class for staff -
    • right click on staff
    • create test class
    • Left hand corner (up arrow)
    • Right click - create test method
    • Specify Name - testSetRoom or any specific class you want to test
    • Unit Test - Create setTest Method (notice its recording)
      • create a new staff object in Staff class
      • Set room to 123
      • End
    • Run test

LAB

  • in Lab in portal -
    • doc - Chapter 2 - read over and follow the instructions in the chapter to recreate/changing the ticket machine
    • First two labs is to complete the lab, not quite emphasises on the github commit