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JavaToolchainFixture.groovy
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JavaToolchainFixture.groovy
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/*
* Copyright 2022 the original author or authors.
*
* 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.
*/
package org.gradle.integtests.fixtures.jvm
import groovy.transform.SelfType
import org.gradle.api.JavaVersion
import org.gradle.integtests.fixtures.AbstractIntegrationSpec
import org.gradle.internal.jvm.Jvm
import org.gradle.internal.jvm.inspection.JvmInstallationMetadata
import org.gradle.test.fixtures.file.TestFile
/**
* Introduces helper methods to write integration tests using Java toolchains.
*/
@SelfType(AbstractIntegrationSpec)
trait JavaToolchainFixture {
TestFile configureJavaPluginToolchainVersion(Jvm jvm) {
buildFile << javaPluginToolchainVersion(jvm)
}
TestFile configureJavaPluginToolchainVersion(JvmInstallationMetadata installationMetadata) {
buildFile << javaPluginToolchainVersion(installationMetadata)
}
String javaPluginToolchainVersion(Jvm jvm) {
return javaPluginToolchainVersion(jvm.javaVersion.majorVersion.toInteger())
}
String javaPluginToolchainVersion(JvmInstallationMetadata installationMetadata) {
return javaPluginToolchainVersion(installationMetadata.languageVersion.majorVersion.toInteger())
}
String javaPluginToolchainVersion(Integer majorVersion) {
"""
java {
toolchain {
languageVersion = JavaLanguageVersion.of(${majorVersion})
}
}
"""
}
/**
* Usage:
* <pre>
* def jvm1 = Jvm.current()
* def jvm2 = AvailableJavaHomes.getDifferentVersion(jvm1.javaVersion)
*
* when:
* withInstallations(jvm1, jvm2).run(":task")
* </pre>
*/
AbstractIntegrationSpec withInstallations(Jvm jvm, Jvm... rest) {
return withInstallations([jvm] + rest.toList())
}
AbstractIntegrationSpec withInstallations(List<Jvm> jvms) {
def installationPaths = jvms.collect { it.javaHome.absolutePath }.join(",")
executer
.withArgument("-Porg.gradle.java.installations.paths=" + installationPaths)
this as AbstractIntegrationSpec
}
/**
* Usage:
* <pre>
* def jdk1 = AvailableJavaHomes.getJvmInstallationMetadata(Jvm.current())
* def jdk2 = AvailableJavaHomes.getJvmInstallationMetadata(AvailableJavaHomes.getDifferentVersion(jdk1.languageVersion))
*
* when:
* withInstallations(jdk1, jdk2).run(":task")
* </pre>
*/
AbstractIntegrationSpec withInstallations(JvmInstallationMetadata installationMetadata, JvmInstallationMetadata... rest) {
def installationPaths = ([installationMetadata] + rest.toList()).collect { it.javaHome.toAbsolutePath().toString() }.join(",")
executer
.withArgument("-Porg.gradle.java.installations.paths=" + installationPaths)
this as AbstractIntegrationSpec
}
/**
* Returns the Java version from the compiled class bytecode.
*/
JavaVersion classJavaVersion(File classFile) {
assert classFile.exists()
return JavaVersion.forClass(classFile.bytes)
}
}