Test Long & Prosper

<?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">

    <!-- … -->

    <dependencies>

        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.5.8</version>
            <scope>test</scope>
            <type>pom</type>
        </dependency>

        <dependency>
            <groupId>org.spockframework</groupId>
            <artifactId>spock-core</artifactId>
            <version>1.3-groovy-2.5</version>
            <scope>test</scope>
        </dependency>

        <!-- Byte Buddy enables mocking of classes (in addition to interfaces)
             see http://spockframework.org/spock/docs/1.3/all_in_one.html#_mocking_classes -->
        <dependency>
            <groupId>net.bytebuddy</groupId>
            <artifactId>byte-buddy</artifactId>
            <version>1.10.3</version>
            <scope>test</scope>
        </dependency>

        <!-- Objenesis enables mocking of classes without default constructor (together with CGLib)
             see http://spockframework.org/spock/docs/1.3/all_in_one.html#_mocking_classes -->
        <dependency>
            <groupId>org.objenesis</groupId>
            <artifactId>objenesis</artifactId>
            <version>3.1</version>
            <scope>test</scope>
        </dependency>

        <!-- … -->

    </dependencies>

    <build>
        <sourceDirectory>src/main/java</sourceDirectory>
        <testSourceDirectory>src/test/groovy</testSourceDirectory>

        <plugins>
            <!-- Configure GMavenPlus to compile Groovy test sources
                 see https://github.com/groovy/GMavenPlus/wiki/Usage -->
            <plugin>
                <groupId>org.codehaus.gmavenplus</groupId>
                <artifactId>gmavenplus-plugin</artifactId>
                <version>1.8.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>addTestSources</goal>
                            <goal>compileTests</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>

            <!-- Spock tests end with "Spec" -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.0.0-M4</version>
                <configuration>
                    <includes>
                        <include>**/*Test.*</include>
                        <include>**/*Spec.*</include>
                    </includes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

plugins {
    id 'java'
    id 'groovy'
}

repositories {
    mavenLocal()
    mavenCentral()
}

dependencies {
    testImplementation 'org.codehaus.groovy:groovy-all:2.5.8'
    testImplementation 'org.spockframework:spock-core:1.3-groovy-2.5'
    testImplementation 'net.bytebuddy:byte-buddy:1.10.3'
    testImplementation 'org.objenesis:objenesis:3.1'
    testImplementation 'ch.qos.logback:logback-classic:1.2.3'
    compileOnly 'org.slf4j:slf4j-api:1.7.29'
}

sourceCompatibility = '11'

class MySpec extends Specification {

    User user = createUser(LocalDate.now().minusYears(23))
    
    @Shared JsonSlurper jsonSlurper = new JsonSlurper()
    
    static final PI = 3.141592654

    def setupSpec() { /* before first feature method */ }
    def setup() { /* before each feature method */ }
    def cleanup() { /* after each feature method */ }
    def cleanupSpec() { /* after last feature method */ }

    def "isOfAge returns true"() {
    	expect:
        !user.isOfAge()
    }
    
    boolean createUser(LocalDate age) {
        return new User(LocalDate.now().minusYears(17))
    }
}

class SuperSpec extends Specification {
    
    def setupSpec() { println "setup super spec" }
    def setup() { println "setup super" }
    def cleanup() { println "cleanup super" }
    def cleanupSpec() { println "cleanup super spec" }
}

class SubSpec extends SuperSpec {
    
    def setupSpec() { println "setup sub spec" }
    def setup() { println "setup sub" }
    def "feature"() {
        expect:
        true
    }
    def cleanup() { println "cleanup sub" }
    def cleanupSpec() { println "cleanup sub spec" }
}

class MySpec extends Specification {

    def "given, when, then"() {
        given:
        User user = new User("jdoe", "John", "Doe", LocalDate.now().plusYears(18))
        
        when:
        boolean ofAge = user.isOfAge()
        
        then:
        ofAge
    }

    def "when, then"() {
        when:
        boolean ofAge = new User("jdoe", "John", "Doe", LocalDate.now().plusYears(18)).isOfAge()
        
        then:
        ofAge
    }
    
    def "given, expect"() {
        given:
        User user = new User("jdoe", "John", "Doe", LocalDate.now().plusYears(18))
        
    	expect:
        user.isOfAge()
    }
    
    def "expect"() {
    	expect:
        new User("jdoe", "John", "Doe", LocalDate.now().plusYears(18)).isOfAge()
    }
}

class MathSpec extends Specification {
    def "maximum of two numbers"() {
        expect:
        Math.max(1, 3) == 3
        Math.max(7, 4) == 7
        Math.max(0, 0) == 0
    }
}

class MathSpec extends Specification {
    def "maximum of two numbers"(int a, int b, int c) {
        expect:
        Math.max(a, b) == c

        where:
        a | b | c
        1 | 3 | 3
        7 | 4 | 7
        0 | 0 | 0
    }
}