jdk/test/langtools/tools/javac/lvti/VarWarnings.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test
 * @summary Check behavior of warnings related to var
 * @library /tools/lib
 * @modules java.logging
 *          java.sql
 *          jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.main
 *          jdk.compiler/com.sun.tools.javac.util
 * @build toolbox.ToolBox toolbox.JavacTask
 * @run junit VarWarnings
 */

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.Objects;

import org.junit.jupiter.api.Test;

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

public class VarWarnings {

    private static final ToolBox tb = new ToolBox();

    @Test
    public void testDeprecationWarning() throws Exception {
        Path base = Paths.get(".");
        Path src = base.resolve("src");
        Path classes = base.resolve("classes");
        tb.writeJavaFiles(src,
                          """
                          package p1;
                          import java.util.List;
                          import java.util.function.Consumer;
                          @SuppressWarnings("deprecation")
                          public class API {
                              public static DeprOutter<DeprInner> get() {
                                  return new DeprOutter<>();
                              }
                              public static Iterable<DeprOutter<DeprInner>> getIterable() {
                                  return null;
                              }
                              public static void run(Consumer<DeprOutter<DeprInner>> task) {
                              }
                          }
                          """,
                          """
                          package p1;
                          @Deprecated
                          public class DeprInner {
                          }
                          """,
                          """
                          package p1;
                          @Deprecated
                          public class DeprOutter<T> {
                              public T get() {
                                  return null;
                              }
                          }
                          """,
                          """
                          package p2;
                          import p1.API;
                          public class Test {
                              public static void main(String... args) {
                                  var v1 = API.get();
                                  API.run(v -> v.get().toString());
                                  API.run((var v) -> v.get().toString());
                                  for (var v2 : API.getIterable()) {}
                              }
                          }
                          """);

        Files.createDirectories(classes);

        var out = new JavacTask(tb)
                .options("-XDrawDiagnostics",
                         "-Werror",
                         "-Xlint:deprecation")
                .outdir(classes)
                .files(tb.findJavaFiles(src))
                .run(Task.Expect.SUCCESS)
                .writeAll()
                .getOutputLines(Task.OutputKind.DIRECT);

        var expectedOut = List.of("");

        if (!Objects.equals(expectedOut, out)) {
            throw new AssertionError("Incorrect Output, expected: " + expectedOut +
                                      ", actual: " + out);

        }
    }

    @Test
    public void testRawTypeWarning() throws Exception {
        Path base = Paths.get(".");
        Path src = base.resolve("src");
        Path classes = base.resolve("classes");
        tb.writeJavaFiles(src,
                          """
                          package p1;
                          import java.util.List;
                          import java.util.function.Consumer;
                          @SuppressWarnings("rawtypes")
                          public class API {
                              public static RawOutter<RawInner> get() {
                                  return new RawOutter<>();
                              }
                              public static Iterable<RawOutter<RawInner>> getIterable() {
                                  return null;
                              }
                              public static void run(Consumer<RawOutter<RawInner>> task) {
                              }
                          }
                          """,
                          """
                          package p1;
                          public class RawInner<T> {
                          }
                          """,
                          """
                          package p1;
                          public class RawOutter<T> {
                              public T get() {
                                  return null;
                              }
                          }
                          """,
                          """
                          package p2;
                          import p1.API;
                          public class Test {
                              public static void main(String... args) {
                                  var v1 = API.get();
                                  API.run(v -> v.get().toString());
                                  API.run((var v) -> v.get().toString());
                                  for (var v2 : API.getIterable()) {}
                              }
                          }
                          """);

        Files.createDirectories(classes);

        var out = new JavacTask(tb)
                .options("-XDrawDiagnostics",
                         "-Werror",
                         "-Xlint:rawtypes")
                .outdir(classes)
                .files(tb.findJavaFiles(src))
                .run(Task.Expect.SUCCESS)
                .writeAll()
                .getOutputLines(Task.OutputKind.DIRECT);

        var expectedOut = List.of("");

        if (!Objects.equals(expectedOut, out)) {
            throw new AssertionError("Incorrect Output, expected: " + expectedOut +
                                      ", actual: " + out);

        }
    }

}