test/langtools/tools/javac/T8210197/DiamondWithAnonymousInnerClassTest.java

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/*
 * @test
 * @bug 8210197
 * @summary javac can't tell during speculative attribution if a diamond expression is creating an anonymous inner class or not
 * @library /tools/lib
 * @modules jdk.compiler/com.sun.tools.javac.api
            jdk.compiler/com.sun.tools.javac.main
 * @build toolbox.ToolBox toolbox.JavacTask
 * @run main DiamondWithAnonymousInnerClassTest
 */

import toolbox.JavacTask;
import toolbox.ToolBox;

public class DiamondWithAnonymousInnerClassTest {
    private static final String Class1Src =
            "package pkg1;\n" +
            "public class MyClass<T> {\n" +
            "    protected MyClass() {}\n" +
            "    protected MyClass(String s) {}\n" +
            "}";
    private static final String Class2Src =
            "package pkg2;\n" +
            "import pkg1.*;\n" +
            "class Client {\n" +
            "    <T> void foo(MyClass<T> m) {}\n" +
            "    void bar() {\n" +
            "        foo(new MyClass<>(){});\n" +
            "    }\n" +
            "}";

    public static void main(String args[]) throws Exception {
        new DiamondWithAnonymousInnerClassTest().run();
    }

    private final ToolBox tb = new ToolBox();

    void run() {
        new JavacTask(tb).sources(Class1Src, Class2Src).run();
    }
}