jdk-24/langtools/test/tools/sjavac/NoState.java

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/*
 * @test
 * @summary Test --no-state option
 * @bug 8135131
  * @library /tools/lib
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.file
 *          jdk.compiler/com.sun.tools.javac.main
 *          jdk.compiler/com.sun.tools.sjavac
 *          jdk.jdeps/com.sun.tools.javap
 * @build Wrapper ToolBox
 * @run main Wrapper NoState
 */

import com.sun.tools.javac.util.Assert;

import java.io.IOException;
import java.nio.file.*;
import java.util.stream.Stream;

public class NoState extends SJavacTester {
    public static void main(String... args) throws Exception {
        new NoState().run();
    }

    public void run() throws Exception {
        tb.writeFile(GENSRC.resolve("pkg/A.java"), "package pkg; class A {}");
        Files.createDirectory(BIN);
        compile("-d", BIN.toString(),
                GENSRC + "/pkg/A.java");

        // Make sure file was compiled
        Assert.check(Files.exists(BIN.resolve("pkg/A.class")));

        // Make sure we have no other files (such as a javac_state file) in the bin directory
        Assert.check(countPathsInDir(BIN) == 1);
        Assert.check(countPathsInDir(BIN.resolve("pkg")) == 1);
    }

    private long countPathsInDir(Path dir) throws IOException {
        try (Stream<Path> files = Files.list(dir)) {
            return files.count();
        }
    }
}