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instructor_notes.md

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Maven dependencies

<!-- junit -->
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-engine</artifactId>
    <version>5.3.1</version>
    <scope>test</scope>
</dependency>

<!-- assertj -->
<dependency>
    <groupId>org.assertj</groupId>
    <artifactId>assertj-core</artifactId>
    <version>3.11.1</version>
    <scope>test</scope>
</dependency>

<!-- JUnit @ParameterizedTest -->
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-params</artifactId>
    <version>5.3.2</version>
    <scope>test</scope>
</dependency>

<!-- mockito -->
<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>2.23.4</version>
    <scope>test</scope>
</dependency>

Surfire plugin - required if running from maven!

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.22.0</version>
</plugin>

./mvnw clean compile test

  1. Exceptions

    • @Test(expected = IllegalArgumentException.class)
    • @Rule public ExpectedException thrown = ExpectedException.none();

@Test
public void myTest() {
    thrown.expect(Exception.class);
    thrown.expectMessage("Init Gold must be >= 0");

    rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}

  2. Branch + code cov

    • Show the code cov in Idea for this class
    • Implement a new test
    • Show that assertion-less test also generates coverage!!
    • In case of Idea problems: 
      ./mvnw cobertura:cobertura
open target/site/cobertura/index.html
    • Also: sudo update-java-alternatives -s java-1.8.0-openjdk-amd64

  3. Parametrized

    • opowiedzieć, że są różne biblioteki eg. JUnitParams

  4. Chatbot Running ./mvnw exec:java In case chatbot server needed:

https://github.com/callicoder/spring-boot-websocket-chat-demo.git
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home
./mvnw spring-boot:run
  1. Demo ideas Demo stuff on Calculator example.
  • Basic: plus, minus
  • Exceptions: div by 0
  • Coverage: abs
  • Matchers: calculator.add(), przykłady na sortowanie listy, uppercase na stringu
  • TDD - fizzbuzz
  • Mock - when: isWeekend (http://isitweekendyet.com/) - use Today class
  • Mock - verify: playSound on weekend AudioPlayer class show eq(), any()
   new AudioPlayer();
  • Parametrized - calculator.add, string.toUpperCase