Java - Iterating and Testing: The Software is Still for theCustomer(Features)

Head First Object-Oriented Analysis and Design
A Brain Friendly Guide to OOA&D
(O'Reilly Media)
Brett McLaughlin (著), Gary Pollice (著)
David West (著)
邦訳
Head Firstオブジェクト指向分析設計
頭とからだで覚えるオブジェクト指向の基本
長瀬 嘉秀 (編集), 永田 渉 (編集)
株式会社テクノロジックアート (翻訳)

開発環境

• OS X Yosemite - Apple (OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Java (プログラミング言語)
• javac (コンパイラ)
• java (application launcher)

Head First Object-Oriented Analysis and Design: A Brain Friendly Guide to OOA&D (Brett McLaughlin (著)、 Gary Pollice (著)、 David West (著) 、 O'Reilly Media)のChapter 9. Iterating and Testing: The Software is Still for the Customer、FEATURE PUZZLE(No. 6228)を解いてみる。

その他参考書籍

• Head First Java 第2版 ―頭とからだで覚えるJavaの基本

FEATURE PUZZLE(No. 6228)

コード(BBEdit, Emacs)

UnitTester.java

import java.util.List;
import java.util.ArrayList;
public class UnitTester {    
    public static void main(String[] args){
        UnitTester unitTester = new UnitTester();
        Unit unit = new Unit(1);
        unitTester.testSetGetPropery(unit, "type", "infantry",
                                     "infantry");
        unitTester.testSetGetSpecificProperty(unit, "hitPoints", 25,
                                              25);
        unitTester.testChangeExistPropertyValue(unit, "hitPoints", 15,
                                                15);
        unitTester.testNonExistProperty(unit, "java");
        unitTester.testCreateUnits();
        
        List<Unit> unitList = new ArrayList<Unit>();
        unitList.add(unit);
        
        unitList.add(new Unit(2));
        unitTester.testCreateUnitsFromList(unitList);

        Units units = new Units(unitList);

        unitTester.testAddUnit(units);
        unitTester.testRemoveUnit(units, unit);
    }
    
    public void testSetGetPropery(Unit unit, String type, Object value,
                                  Object output){
        System.out.println("Setting/Getting the type property.");
        unit.setProperty(type, value);
        if (unit.getProperty(type) == output){
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed: " +
                               unit.getProperty(type));
        }
    }
    
    public void testSetGetSpecificProperty(Unit unit, String name,
                                           Object value,
                                           Object output) {
        System.out.println("Setting/Getting a unit-specific property");
        unit.setProperty(name, value);
        if (unit.getProperty(name) == output){
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed: " +
                               unit.getProperty(name));
        }
    }

    public void testChangeExistPropertyValue(Unit unit, String name,
                                             Object value,
                                             Object output){
        System.out.println("Changing an existing property's value.");
        unit.setProperty(name, value);
        if (unit.getProperty(name) == output){
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed: " +
                               unit.getProperty(name));            
        }
    }

    public void testNonExistProperty(Unit unit, String property) {
        System.out.println("Getting a non-existent property's value");
        try {
            Object value = unit.getProperty(property);
        } catch (RuntimeException e) {
            System.out.println("Test passed");
            return;
        }
        System.out.println("Test failed: " + property);
    }

    public void testCreateUnits() {
        System.out.println("Creat units");
        Units units = new Units();
        if (units.getUnits().isEmpty()) {
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed: ");
        }
    }
    
    public void testCreateUnitsFromList(List<Unit> unitList) {
        System.out.println("Create units from list");
        Units units = new Units(unitList);
        if (!units.getUnits().isEmpty()) {
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed: ");
        }
    }

    public void testAddUnit(Units units) {
        System.out.println("Adding unit");
        int n = units.getUnits().size();
        Unit unit = new Unit(1);
        units.addUnit(unit);
        if (units.getUnits().size() == n + 1) {
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed");
        }
    }

    public void testRemoveUnit(Units units, Unit unit) {
        System.out.println("Removing unit");
        int n = units.getUnits().size();
        units.removeUnit(unit);
        if (units.getUnits().size() == n - 1) {
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed");
        }
    }
}

Units.java

import java.util.List;
import java.util.ArrayList;

public class Units {
    private List<Unit> units;

    public Units() {
        this.units = new ArrayList<Unit>();
    }

    public Units(List<Unit> units){
        this.units = units;
    }
    
    public List<Unit> getUnits() {
        return units;
    }

    public void addUnit(Unit unit) {
        units.add(unit);
    }

    public void removeUnit(Unit unit) {
        units.remove(unit);
    }
}

入出力結果(Terminal)

$ jrun.sh UnitTester
Setting/Getting the type property.
Test passed
Setting/Getting a unit-specific property
Test passed
Changing an existing property's value.
Test passed
Getting a non-existent property's value
Test passed
Creat units
Test passed
Create units from list
Test passed
Adding unit
Test passed
Removing unit
Test passed
$