Lesson 11 start

pom.xml

@@ -16,16 +16,72 @@
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
   </properties>
-
   <dependencies>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.13</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.15.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.19.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.serenitydojo</groupId>
+      <artifactId>java-for-testers</artifactId>
+      <version>1.0.0-SNAPSHOT</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>orgit g.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.15.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.19.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.serenitydojo</groupId>
+      <artifactId>java-for-testers</artifactId>
+      <version>1.0.0-SNAPSHOT</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <version>RELEASE</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <version>RELEASE</version>
+      <scope>compile</scope>
+    </dependency>
   </dependencies>
 
+
   <build>
     <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
       <plugins>
@@ -70,5 +126,23 @@
         </plugin>
       </plugins>
     </pluginManagement>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>9</source>
+          <target>9</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>11</source>
+          <target>11</target>
+        </configuration>
+      </plugin>
+    </plugins>
   </build>
 </project>

src/main/java/com/serenitydojo/Cat.java

@@ -0,0 +1,68 @@
+package com.serenitydojo;
+
+/**
+ * A feline creature.
+ */
+public class Cat extends Pet {
+
+    private String favoriteFood;
+    private int age;
+
+    // A very useful field
+    public static final String CAT_NOISE = "Meow";
+
+    public static String usualFood() {
+        return "Tuna";
+    }
+
+    public Cat(String name, int age) {
+        super(name);
+        this.age = age;
+        this.favoriteFood = usualFood();
+    }
+
+    public Cat(String name, String favoriteFood, int age) {
+        super(name);
+        this.favoriteFood = favoriteFood;
+        this.age = age;
+    }
+
+    public void setFavoriteFood(String favoriteFood) {
+        this.favoriteFood = favoriteFood;
+    }
+
+    public String getFavoriteFood() {
+        return favoriteFood;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    @Override
+    public String makeNoise() {
+        return CAT_NOISE;
+    }
+
+    @Override
+    public String play() {
+        return "plays with string";
+    }
+
+    public void feed(String food) {
+        System.out.println(getName() + " eats some " + food);
+    }
+
+    public void groom() {
+        lickPaws();
+        cleanFur();
+    }
+
+    private void cleanFur() {
+        System.out.println(getName() + " cleans his fur");
+    }
+
+    private void lickPaws() {
+        System.out.println(getName() + " licks his paws");
+    }
+}

src/main/java/com/serenitydojo/Dog.java

@@ -0,0 +1,29 @@
+package com.serenitydojo;
+
+public class Dog extends Pet {
+    private String favoriteToy;
+    private int age;
+
+    public Dog(String name, String favoriteToy, int age) {
+        super(name);
+        this.favoriteToy = favoriteToy;
+        this.age = age;
+    }
+
+    @Override
+    public String play() {
+        return "plays with bone";
+    }
+
+    public String getFavoriteToy() {
+        return favoriteToy;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String makeNoise() {
+        return "Woof";
+    }
+}

src/main/java/com/serenitydojo/Hampster.java

@@ -0,0 +1,30 @@
+package com.serenitydojo;
+
+public class Hampster extends Pet {
+    private String favoriteGame;
+    private int age;
+
+    public Hampster(String name, String favoriteGame, int age) {
+        super(name);
+        this.favoriteGame = favoriteGame;
+        this.age = age;
+    }
+
+    public String getFavoriteGame() {
+        return favoriteGame;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    @Override
+    public String play() {
+        return "runs in wheel";
+    }
+
+    @Override
+    public String makeNoise() {
+        return "Squeak";
+    }
+}

src/main/java/com/serenitydojo/Pet.java

@@ -0,0 +1,18 @@
+package com.serenitydojo;
+
+public abstract class Pet {
+    private String name;
+    private int age;
+
+
+    public Pet(String name) {
+        this.name = name;
+    }
+    public String getName() {
+        return name;
+    }
+
+    public String goForWalks() { return "walk walk walk"; }
+    public abstract String makeNoise();
+    public abstract String play();
+}

src/main/java/com/serenitydojo/exceptions/FileHasNoWordException.java

@@ -0,0 +1,12 @@
+package com.serenitydojo.exceptions;
+
+public class FileHasNoWordException extends RuntimeException{
+    public FileHasNoWordException(String message){
+        super(message);
+    }
+    public FileHasNoWordException(String message, Throwable cause){
+        super(message,cause);
+    }
+
+
+}

src/main/java/com/serenitydojo/exceptions/WhenWorkingWithExceptions.java

@@ -0,0 +1,39 @@
+package com.serenitydojo.exceptions;
+import org.assertj.core.api.Assertions;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.NoSuchFileException;
+
+public class WhenWorkingWithExceptions {
+    WordCounter wordCounter = new WordCounter();
+    @Test
+    public void shouldCountWordsInAString(){
+        int numberOfWords = wordCounter.numberOfWordsIn("some string");
+        Assertions.assertThat(numberOfWords).isEqualTo(2);
+
+
+    }
+    @Test
+    public void shouldReturnZeroForANullString(){
+        Assertions.assertThat(wordCounter.numberOfWordsIn(null)).isEqualTo(0);
+
+    }
+    @Test
+    public void shouldCountWordsInAFile() throws Exception {
+        int numberOfWords = wordCounter.numberOfWordsInAfile("src/main/resources/hello.txt");
+    }
+    @Test(expected = FileHasNoWordException.class)
+    public void shoulReportAnErrowIfThatFileDoesNotExist()throws Exception{
+        int numberOfWords = wordCounter.numberOfWordsInAfile("file-that-does-not-exist.txt");
+    }
+    @Test(expected = FileHasNoWordException.class)
+    public void shouldThrowMeaningfullExceptionIfThereAreNoWordsInAFile()throws Exception{
+        int numberOfWords = wordCounter.numberOfWordsInAfile("src/main/resources/no_words.txt");
+        Assertions.assertThat(numberOfWords).isEqualTo(0);
+
+
+    }
+
+}

src/main/java/com/serenitydojo/exceptions/WordCounter.java

@@ -0,0 +1,33 @@
+package com.serenitydojo.exceptions;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Paths;
+
+public class WordCounter {
+    public int numberOfWordsIn(String value){
+        if(value==null){
+            return 0;
+        }
+        return value.split("\\W").length;
+
+
+    }
+
+    public int numberOfWordsInAfile(String fileName) throws IOException {
+        try {
+            String fileContents = Files.readString(Paths.get(fileName));
+            int wordCount = numberOfWordsIn(fileContents);
+            if(wordCount==0){
+                throw new FileHasNoWordException("no words found in a file " + fileName);
+            }
+            return wordCount;
+        }
+        catch(NoSuchFileException noSuchFile){
+            throw new FileHasNoWordException("no words found in a non existing file " + fileName);
+
+        }
+
+    }
+}

src/main/java/com/serenitydojo/model/AnimalType.java

@@ -0,0 +1,5 @@
+package com.serenitydojo.model;
+
+public enum AnimalType {
+    CAT, DOG, HAMSTER, FISH, Hamster, Dog, Cat, LLAMA
+}

src/main/java/com/serenitydojo/model/Feeder.java

@@ -0,0 +1,17 @@
+package com.serenitydojo.model;
+
+public class Feeder {
+    public FoodType feeds(AnimalType animal, boolean isPremium) {
+
+        switch (animal) {
+            case CAT:
+                return (isPremium) ? FoodType.SALMON : FoodType.TUNA;
+            case DOG:
+                return  (isPremium) ? FoodType.DELUXE_DOG_FOOD : FoodType.DOG_FOOD;
+            case HAMSTER:
+                return (isPremium) ? FoodType.LETTUCE : FoodType.CABBAGE;
+            default:
+                return  FoodType.UNKNOWN;
+        }
+    }
+}

src/main/java/com/serenitydojo/model/FoodType.java

@@ -0,0 +1,5 @@
+package com.serenitydojo.model;
+
+public enum FoodType {
+    TUNA, CABBAGE, LETTUCE, SALMON, DOG_FOOD, DELUXE_DOG_FOOD, Tuna, Cabbage, Dogs_Food, Salmon, Deluxe_Dog_Food, Lettuce, UNKNOWN
+}

src/main/resources/hello.txt

@@ -0,0 +1 @@
+hello world