JUnit 5 in Java 8 using Fizz Buzz example

README.md

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+## Fizz Buzz Example in Kotlin with Spek Framework for BDD Style tests
+
+### Fizz Buzz is a game where
+- if the number is divisible by 3, you say Fizz
+- if the number is divisible by 5, you say Buzz
+- if neither, you say the number

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.techprimers.testing</groupId>
+    <artifactId>junit5-example</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+        <junit.jupiter.version>5.0.0-M3</junit.jupiter.version>
+        <junit.platform.version>1.0.0-M3</junit.platform.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.19</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.junit.platform</groupId>
+                        <artifactId>junit-platform-surefire-provider</artifactId>
+                        <version>1.0.0-M3</version>
+                    </dependency>
+                </dependencies>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.0.0-M3</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

src/main/java/com/techprimers/testing/FizzBuzz.java

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+package com.techprimers.testing;
+
+public class FizzBuzz {
+
+    public String play(int number) {
+
+        if (number == 0) throw new IllegalArgumentException("Number must not be 0");
+        if (number % 3 == 0) return "Fizz";
+        if (number % 5 == 0) return "Buzz";
+
+
+        return String.valueOf(number);
+    }
+}

src/test/java/com/techprimers/testing/FizzBuzzTest.java

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+package com.techprimers.testing;
+
+import org.junit.jupiter.api.*;
+
+class FizzBuzzTest {
+
+    public FizzBuzz fB;
+
+    @BeforeEach
+    public void setUp() {
+        fB = new FizzBuzz();
+    }
+
+    @DisplayName("Play FizzBuzz with number = 1")
+    @Test
+    public void testNumber() {
+        String fizzBuzz = fB.play(1);
+        Assertions.assertEquals(fizzBuzz, "1");
+    }
+
+    @DisplayName("Play FizzBuzz with number = 3")
+    @Test
+    public void testFizz() {
+        String fizzBuzz = fB.play(3);
+        Assertions.assertEquals(fizzBuzz, "Fizz");
+    }
+
+    @DisplayName("Play FizzBuzz with number = 5")
+    @Test
+    public void testBuzz() {
+        String fizzBuzz = fB.play(5);
+        Assertions.assertEquals(fizzBuzz, "Buzz");
+    }
+
+    @DisplayName("Don't Play FizzBuzz with number = 0")
+    @Test
+    public void testZero() {
+
+        Assertions.assertThrows(IllegalArgumentException.class,
+                () -> fB.play(0));
+    }
+
+    @AfterEach
+    public void tearDown() {
+        fB = null;
+    }
+
+}