test/nashorn/script/basic/JDK-8191468.js

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/**
 * JDK-8191468: jdk.scripting.nashorn.shell (jjs) module should use optional dependency for java.compiler module
 *
 * @test
 * @run
 */

var optJjsMod = java.lang.ModuleLayer.boot().findModule("jdk.scripting.nashorn.shell");

// make sure that the module exists!
Assert.assertTrue(optJjsMod.isPresent());

// jdk.scripting.nashorn.shell should use optional dependency for java.compiler
var javaCompilerDependency = optJjsMod.get().
        descriptor.requires().
        stream().
        filter(function(mod) { return mod.name() == "java.compiler" }).
        findFirst();

// java.compiler dependency should be present
Assert.assertTrue(javaCompilerDependency.isPresent());

var Modifier = java.lang.module.ModuleDescriptor.Requires.Modifier;
// java.compiler requires should be "requires static"
Assert.assertTrue(javaCompilerDependency.get().modifiers().contains(Modifier.STATIC));