├── TestDrivenDevelopment
    ├── config.txt
    ├── src
    │   ├── main
    │   │   └── java
    │   │   │   └── lk
    │   │   │       └── himash
    │   │   │           ├── model
    │   │   │               └── City.java
    │   │   │           ├── controller
    │   │   │               └── CityController.java
    │   │   │           └── util
    │   │   │               └── CityDetails.java
    │   └── test
    │   │   └── java
    │   │       └── City.java
    └── pom.xml
└── README.md


/TestDrivenDevelopment/config.txt:
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 1 | 01) TDD stands for Test Driven Development.
 2 | 02) Use for test the business logic.
 3 | 03) Advantages : 
 4 | 	01) Code quality.
 5 | 	02) Code coverage.
 6 | 	03) TDD had own life-cycle name is RED GREEN REFACTOR.
 7 | 		01) RED - write test case for test case fail.
 8 | 		02) GREEN - pass the test case.
 9 | 		03) REFACTOR - improve the code.
10 | 


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/TestDrivenDevelopment/src/main/java/lk/himash/model/City.java:
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 1 | package lk.himash.model;
 2 | 
 3 | import lombok.AllArgsConstructor;
 4 | import lombok.Data;
 5 | import lombok.NoArgsConstructor;
 6 | 
 7 | @AllArgsConstructor
 8 | @NoArgsConstructor
 9 | @Data
10 | public class City {
11 | 
12 |     private int id;
13 |     private String name;
14 |     private String province;
15 |     private int population;
16 | 
17 | 
18 | 
19 | }
20 | 


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/README.md:
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 1 | # Test-driven-development
 2 | Implement TDD (Test driven development) using Java.
 3 | 
 4 | ## Requirements
 5 | 
 6 | 01) Java 11
 7 | 02) Maven 3.8 
 8 | 
 9 | ## Project setup
10 | 
11 | 01) Clone the project
12 | 
13 | 		https://github.com/himash79/Test-driven-development.git
14 |     
15 | 03) Clean and build the project using maven
16 | 
17 | 		open command line (CMD) in project directory and execute 'mvn clean install'
18 |     
19 | 04) Open project using intelij / eclipse.
20 | 		
21 | 05) Test the senarios.
22 | 


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/TestDrivenDevelopment/src/main/java/lk/himash/controller/CityController.java:
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 1 | package lk.himash.controller;
 2 | 
 3 | import lk.himash.model.City;
 4 | import lk.himash.util.CityDetails;
 5 | 
 6 | import java.util.Map;
 7 | 
 8 | public class CityController {
 9 | 
10 |     public String getCityDetails(int id) {
11 |         City city = null;
12 |         Map<Integer, City> cities = CityDetails.setAllCities();
13 |         if(id != 0) {
14 |            city = cities.get(id);
15 |         }
16 |         return city.getName();
17 |     }
18 | 
19 | }
20 | 


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/TestDrivenDevelopment/src/main/java/lk/himash/util/CityDetails.java:
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 1 | package lk.himash.util;
 2 | 
 3 | import lk.himash.model.City;
 4 | 
 5 | import java.util.HashMap;
 6 | import java.util.Map;
 7 | 
 8 | public class CityDetails {
 9 | 
10 |     public static Map<Integer, City> setAllCities() {
11 |         Map<Integer, City> cities = new HashMap<>();
12 |         cities.put(1,new City(1,"colombo","weston",10000));
13 |         cities.put(2,new City(2,"galle","southern",4000));
14 |         cities.put(3,new City(3,"kandy","middle",20000));
15 |         cities.put(4,new City(4,"jaffna","north",14000));
16 |         cities.put(5,new City(5,"chilaw","weston",10700));
17 |         return cities;
18 |     }
19 | 
20 | }
21 | 


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/TestDrivenDevelopment/src/test/java/City.java:
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 1 | import lk.himash.controller.CityController;
 2 | import org.junit.Assert;
 3 | import org.junit.Test;
 4 | 
 5 | public class City {
 6 | 
 7 |     @Test //RED
 8 |     public void getCityDetails_test() {
 9 |         int id = 1;
10 |         String expectedOP = "colombo";
11 |         CityController cc = new CityController();
12 |         String realOP = cc.getCityDetails(id);
13 |         Assert.assertEquals(expectedOP,realOP);
14 | 
15 |     }
16 | 
17 |     @Test(expected = NullPointerException.class) //GREEN
18 |     public void getCityDetails_test_error() {
19 |         int id = 0;
20 |         String expectedOP = "colombo";
21 |         CityController cc = new CityController();
22 |         String realOP = cc.getCityDetails(id);
23 |         Assert.assertEquals(expectedOP,realOP);
24 | 
25 |     }
26 | }
27 | 


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/TestDrivenDevelopment/pom.xml:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0"
 3 |          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 |          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 |     <modelVersion>4.0.0</modelVersion>
 6 | 
 7 |     <groupId>lk.himash</groupId>
 8 |     <artifactId>TestDrivenDevelopment</artifactId>
 9 |     <version>1.0-SNAPSHOT</version>
10 | 
11 |     <properties>
12 |         <maven.compiler.source>11</maven.compiler.source>
13 |         <maven.compiler.target>11</maven.compiler.target>
14 |     </properties>
15 | 
16 |     <dependencies>
17 |         <dependency>
18 |             <groupId>junit</groupId>
19 |             <artifactId>junit</artifactId>
20 |             <version>4.12</version>
21 |             <scope>test</scope>
22 |         </dependency>
23 |         <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
24 |         <dependency>
25 |             <groupId>org.projectlombok</groupId>
26 |             <artifactId>lombok</artifactId>
27 |             <version>1.18.24</version>
28 |             <scope>provided</scope>
29 |         </dependency>
30 | 
31 |     </dependencies>
32 | 
33 | </project>


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