NPEEmptyFileTest.java

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/**
 * @test
 * @summary NPE while compiling empty source file with --module-source-path option
 * @library /tools/lib
 * @modules
 *      jdk.compiler/com.sun.tools.javac.api
 *      jdk.compiler/com.sun.tools.javac.main
 * @build toolbox.ToolBox toolbox.JavacTask ModuleTestBase
 * @run main NPEEmptyFileTest
 */

import java.nio.file.Files;
import java.nio.file.Path;

import toolbox.JavacTask;
import toolbox.Task;
import toolbox.ToolBox;

public class NPEEmptyFileTest extends ModuleTestBase {
    public static void main(String... args) throws Exception {
        new NPEEmptyFileTest().runTests();
    }

    @Test
    public void compileEmptyFile(Path base) throws Exception {
        Path modules = base.resolve("modules");
        Files.createDirectories(modules);
        Path emptyJavaFile = base.resolve("Test.java");
        tb.writeFile(emptyJavaFile, "");
        new JavacTask(tb, Task.Mode.EXEC)
                .options("--module-source-path", modules.toString(),
                        "-d", modules.toString(), emptyJavaFile.toString())
                .run()
                .writeAll();
    }
}