test/langtools/tools/javac/modules/NPECompilingModuleInfoTest.java

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/**
 * @test
 * @bug 8150733
 * @summary NPE when compiling module-info.java with a class declaration in a non-module mode
 * @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 NPECompilingModuleInfoTest
 */

import java.nio.file.Path;

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

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

    @Test
    public void testCompileNoError(Path base) throws Exception {
        Path mod = base.resolve("mod");
        tb.writeJavaFiles(mod, "module mod { exports pkg; }");
        Path pkg = mod.resolve("pkg");
        Path customClass = pkg.resolve("module-info.java");
        tb.writeFile(customClass, "package pkg; class C {}");
        Path classes = base.resolve("classes");
        tb.createDirectories(classes);

        new JavacTask(tb)
                .outdir(classes)
                .files(findJavaFiles(mod))
                .run()
                .writeAll()
                .getOutputLines(Task.OutputKind.DIRECT);
    }
}