Gradle Test Plugin

Caution

Breaking Changes! This library requires Gradle >= 8.4 to work properly.

Summary

This library serves some functionality for Gradle plugin builds. It contains some helper classes, methods and a Spock extension 'TestDir' for test directories.

Usage

To use the Gradle Test Plugin, add the following lines to your build script:

    tasks {
        withType().configureEach {
            //Set supported Gradle version
            systemProperty("intershop.gradle.versions", "8.4,8.5,8.10.2")
            //working dir for tests
            systemProperty("intershop.test.base.dir", project.layout.buildDirectory.get().dir("test-working").asFile.absolutePath)
        }
    }

    dependencies {
        testImplementation("com.intershop.gradle.test:test-gradle-plugin:4.1.0")
    }

Basic Test Classes

Abstract Integration Test

Extend your integration test with com.intershop.gradle.test.AbstractIntegrationGroovySpec for Groovy based build scripts, for Kotlin based scripts it is necessary to use com.intershop.gradle.test.AbstractIntegrationKotlinSpec:

import com.intershop.gradle.test.AbstractIntegrationGroovySpec

class IntegrationTestSpec extends AbstractIntegrationGroovySpec {
...
}

import com.intershop.gradle.test.AbstractIntegrationKotlinSpec

class IntegrationTestSpec extends AbstractIntegrationKotlinSpec {
...
}

AbstractIntegrationGroovySpec and AbstractIntegrationKotlinSpec extends AbstractIntegrationSpec which extends spock.lang.Specification.

This abstract class comes with some helper methodes, the definition of a project folder, the base definition of the build file and the classpath for GradleRunner (see https://docs.gradle.org/current/userguide/test_kit.html):

Variable	Type	Default Value	Description
testProjectDir	File	<buildDir>/test-working/<spec name>/<test method name>	The base directory of the test project (blank space is replaced with a dash)
buildFile	File	<testProjectDir>/build.gradle	The build file of the test project
pluginClasspath	List<File>	<list of all runtime dependency files>	List of all runtime dependency files prepared by 'createClasspathManifest' task

Methods	Type	Parameters	Description
getPreparedGradleRunner	GradleRunner		Returns a GradleRunner created with base project dir (testProjectDir) and the classpath (pluginClasspath)
getSupportedGradleVersions	List<String>		Returns a list of strings created from the system property 'intershop.gradle.versions'
writeJavaTestClass	File	String packageDotted File baseDir = testProjectDir	Creates a "Hello World" Java source file in the standard source directory (src/main/java) with the specified package. Without a specified baseDir parameter it creates the source file for a single Java Gradle project. It returns the source file itself.
writeGroovyTestClass	File	String packageDotted File baseDir = testProjectDir	Creates a "Hello World" Groovy source file in the standard source directory (src/main/groovy) with the specified package. Without a specified baseDir parameter it creates the source file for a single Groovy Gradle project. It returns the source file itself.
createSubProject	File	String projectPath File settingsGradle def buildFileContent	Creates a subproject with path, e.g., 'test1:test2'. The return value contains the directory of the subproject.
writeJavaTestClassTest	File	String packageDotted boolean failTest = false File baseDir = testProjectDir	Creates a "Hello World Test" Java source file in the standard source directory (src/test/java) with the specified package. Without a specified baseDir parameter it creates the source file for a single Java Gradle project. Per default the test finished successful, if you set failTest to true the test will fail. It returns the source file itself.
writeGroovyTestClassSpec	File	String packageDotted boolean failTest = false File baseDir = testProjectDir	Creates a "Hello World Spec" Groovy test spec in the standard source directory (src/test/groovy) with the specified package. Without a specified baseDir parameter it creates the source file for a single Java Gradle project. Per default the test finished successful, if you set failTest to true the test will fail. It returns the source file itself. Note It is necessery to specify dependencies for the build file!
file	File	String path File baseDir = testProjectDir	Creates a file in the specified path in the base project dir. Without a specified baseDir parameter it creates the file with the specified path in a single project dir.
directory	File	String path File baseDir = testProjectDir	Creates a directory in the specified path in the base project dir. Without a specified baseDir parameter it creates the directory with the specified path in a single project dir.
copyResources	void	String srcDir String target = '' File baseDir = testProjectDir	Copies directories with files from test resources.

example.groovy

package com.package.test

import com.intershop.gradle.test.AbstractIntegrationGroovySpec
import org.gradle.testkit.runner.GradleRunner
import static org.gradle.testkit.runner.TaskOutcome.SUCCESS

class IntegrationPluginSpec extends AbstractIntegrationGroovySpec {

    def 'test description'() {
        given:
        writeJavaTestClass('com.test.package.test')
        writeJavaTestClassTest('com.test.package.test')

        buildFile << """
            plugins {
                id 'java'
            }

            group = 'com.test'
            version = '1.0.0'

            sourceCompatibility = 11
            targetCompatibility = 11

            dependencies {
                testCompile 'junit:junit:4.13'
            }

            repositories {
                jcenter()
            }
        """.stripIndent()

        when:
        def result = preparedGradleRunner
                .withArguments('test', '--stacktrace', '-i')
                .withGradleVersion(gradleVersion)
                .build()

        then:
        result.task(':test').outcome == SUCCESS

        where:
        gradleVersion << supportedGradleVersions
    }

For the use of the method 'supportedGradleVersions' it is necessary to specify the system property 'intershop.gradle.versions':

build.gradle

...

test {
    // Gradle versions for test
    systemProperty 'intershop.gradle.versions', '7.0'
    systemProperty 'intershop.test.base.dir', (new File(project.buildDir, 'test-working')).absolutePath
}

dependencies {
    classpath 'com.intershop.gradle.test:test-gradle-plugin:4.1.0'
    compile gradleTestKit()
}

...

Basic Project Plugin Test

Basic plugin tests are integrated in com.intershop.gradle.test.AbstractProjectSpec. This class should be used as a base class for additional extended plugin tests.

import com.intershop.gradle.test.AbstractProjectSpec

class ProjectTestSpec extends AbstractProjectSpec {

    @Override
    Plugin getPlugin() {
        return new 'Plugin Class'()
    }

...
}

AbstractProjectSpec extends spock.lang.Specification.

This abstract class adds some special tests for plugins:

Test
'apply does not throw exceptions'
'apply is idempotent'
'apply is fine on all levels of multiproject'
'apply to multiple subprojects'

The class provides the following variables:

Variable	Type	Default Value	Description
testProjectDir	File	<buildDir>/test-working/<spec name>/<test method name>	The base directory of the test project (blank space is replaced with a dash)
testName	org.junit.rules.TestName		The test name
canonicalName	String	<test method name>	The test name without spaces (blank space is replaced with a dash)
project	Project	<project with canonicalName and testProjectDir>	The test root project

This class is a fork from Netflix nebula-test extension.

Test Directory Spock Extension @TestDir

Used on a File property of a spec class this annotation will cause a temporary directory to be created and injected for the spec before the first feature method is run. The directory will be deleted if exists before it is created again for the spec.

The baseDir is without any special configuration taken from the test system property 'intershop.test.base.dir'. The default root path is 'build/test-working'.

Methods	Type	Default Value
baseDir	String	''	Base dir of the directory
clean	boolean	true	Deletes the directory before test starts
overwrite	boolean	false	If clean is false, and this value is also false the folder will be extended with a number.
useTempDirAsBase	boolean	false	Instead of 'intershop.test.base.dir' the value of 'java.io.tmpdir' is used for the base dir.
large	boolean	false	If set the test directory is expected to be large and is cleaned using OS commands. CAUTION: This does not work for long directories on Windows.

Assertions

This adds supplementary assertions for tests.

import spock.lang.Specification

import static com.intershop.gradle.test.util.Assertions.*

class Spec extends Specification {

    def "file contains content"() {
        when:
            File f = new File("test.file")
            String c = "test.content"
            f.setText(c)

        then:
            fileHasContent(f, 'test content')
    }

    def "file does not contain failures"() {
         when:
            File f = new File("test.file")
            f << """Text that does not contain any messages
            indicating failures at all"""

         then:
             isErrorFree('some context', text, ['error','exception'])
    }

    def "content does not contain failures"() {
        when:
            String text = """Text that does not contain any messages
            indicating failures at all"""

        then:
            isErrorFree('some context', text, ['error','exception'])
    }

...
}

For more information see assigned Groovy doc.

Repository Builder

Ivy Repository Builder

This builder creates a simply Ivy repository based on Ivy and artifact pattern.

import com.intershop.gradle.test.builder.TestIvyRepoBuilder

String writeIvyRepo(File dir) {
    File repoDir = new File(dir, 'repo')

    new TestIvyRepoBuilder().repository (ivyPattern: ivyPattern, artifactPattern: artifactPattern) {

         module(org: 'com.company', name: 'module', rev: '1.0.0') {
             dependency org: 'com.company', name: 'dep1', rev: '1.0.0'
             dependency org: 'com.company', name: 'dep2', rev: '1.0.0'
             dependency org: 'com.company', name: 'dep3', rev: '1.0.0'
         }
         module(org: 'com.company', name: 'dep1', rev: '1.0.0')
         module(org: 'com.company', name: 'dep2', rev: '1.0.0')
         module(org: 'com.company', name: 'dep3', rev: '1.0.0')

    }.writeTo(testDir)
}

For more information see assigned Groovy doc.

Maven Repository Builder

This builder creates a simply Maven repository.

import com.intershop.gradle.test.builder.TestMavenRepoBuilder

String writeMavenRepo(File dir) {
    File repoDir = new File(dir, 'repo')

    new TestMavenRepoBuilder().repository {
        project(artifactId:'foo') {
            dependency(artifactId:'dep')
        }
        project(artifactId:'bar', packaging:'pkg', classifier:'cls') {
            module('sub1')
            module('sub2')
            parent(artifactId:'par', relativePath:'relPath')
            dependency(artifactId:'dep1', classifier:'cls', scope:'scope', type:'typ', optional:true)
            dependency(artifactId:'dep2', optional:false)

            artifact('content')
            artifact {
                file(path:'foo/bar', 'bazzzz')
            }
            artifact(classifier:'javadoc') {
                dir('foo/baz')
            }
        }
    }.writeTo(testDir)
}

For more information see assigned Groovy doc.

Java Doc

For more information please check the provided Java doc.

Contribute

See here for details.

License

Copyright 2014-2016 Intershop Communications.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License // for the specific language governing permissions and limitations under the License.