--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/api/TestGetScopeResult.java Fri Jun 29 10:41:10 2018 +0200
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8205418
+ * @summary Test the outcomes from Trees.getScope
+ * @modules jdk.compiler
+ */
+
+import java.io.IOException;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.lang.model.element.Element;
+import javax.tools.JavaCompiler;
+import javax.tools.SimpleJavaFileObject;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+import com.sun.source.tree.CompilationUnitTree;
+import com.sun.source.tree.LambdaExpressionTree;
+import com.sun.source.tree.Scope;
+import com.sun.source.util.JavacTask;
+import com.sun.source.util.TreePath;
+import com.sun.source.util.TreePathScanner;
+import com.sun.source.util.Trees;
+
+import static javax.tools.JavaFileObject.Kind.SOURCE;
+
+public class TestGetScopeResult {
+ public static void main(String... args) throws IOException {
+ new TestGetScopeResult().run();
+ }
+
+ public void run() throws IOException {
+ String[] simpleLambda = {
+ "s:java.lang.String",
+ "i:Test.I",
+ "super:java.lang.Object",
+ "this:Test"
+ };
+ doTest("class Test { void test() { I i = s -> { }; } interface I { public void test(String s); } }",
+ simpleLambda);
+ doTest("class Test { void test() { I i = s -> { }; } interface I { public int test(String s); } }",
+ simpleLambda);
+ doTest("class Test { void test() { I i = s -> { }; } interface I { public String test(String s); } }",
+ simpleLambda);
+ doTest("class Test { void test() { I i; inv(s -> { }); } void inv(I i) { } interface I { public void test(String s); } }",
+ simpleLambda);
+ doTest("class Test { void test() { I i; inv(s -> { }); } void inv(I i) { } interface I { public int test(String s); } }",
+ simpleLambda);
+ doTest("class Test { void test() { I i; inv(s -> { }); } void inv(I i) { } interface I { public String test(String s); } }",
+ simpleLambda);
+ String[] dualLambda = {
+ "s:java.lang.String",
+ "i:Test.I1",
+ "super:java.lang.Object",
+ "this:Test",
+ "s:java.lang.CharSequence",
+ "i:Test.I1",
+ "super:java.lang.Object",
+ "this:Test"
+ };
+ doTest("class Test { void test() { I1 i; inv(s -> { }, s -> { }); } void inv(I1 i, I2 i) { } interface I1 { public String test(String s); } interface I2 { public void test(CharSequence s); } }",
+ dualLambda);
+ doTest("class Test { void test() { I1 i; inv(s -> { }, s -> { }); } void inv(I1 i, I2 i) { } interface I1 { public String test(String s); } interface I2 { public int test(CharSequence s); } }",
+ dualLambda);
+ String[] brokenType = {
+ "s:<any>",
+ "u:Undefined",
+ "super:java.lang.Object",
+ "this:Test"
+ };
+ doTest("class Test { void test() { Undefined u = s -> { }; } }",
+ brokenType);
+ String[] multipleCandidates1 = {
+ "s:<any>",
+ "super:java.lang.Object",
+ "this:Test"
+ };
+ doTest("class Test { void test() { cand1(s -> { }); } void cand1(I1 i) { } void cand1(I2 i) { } interface I1 { public String test(String s); } interface I2 { public int test(CharSequence s); } }",
+ multipleCandidates1);
+ String[] multipleCandidates2 = {
+ "s:java.lang.String",
+ "super:java.lang.Object",
+ "this:Test"
+ };
+ doTest("class Test { void test() { cand1(s -> { }); } void cand1(I1 i) { } void cand1(I2 i, int i) { } interface I1 { public String test(String s); } interface I2 { public int test(CharSequence s); } }",
+ multipleCandidates2);
+ }
+
+ public void doTest(String code, String... expected) throws IOException {
+ JavaCompiler c = ToolProvider.getSystemJavaCompiler();
+ try (StandardJavaFileManager fm = c.getStandardFileManager(null, null, null)) {
+ class MyFileObject extends SimpleJavaFileObject {
+ MyFileObject() {
+ super(URI.create("myfo:///Test.java"), SOURCE);
+ }
+ @Override
+ public String getCharContent(boolean ignoreEncodingErrors) {
+ return code;
+ }
+ }
+ JavacTask t = (JavacTask) c.getTask(null, fm, null, null, null, List.of(new MyFileObject()));
+ CompilationUnitTree cut = t.parse().iterator().next();
+ t.analyze();
+
+ List<String> actual = new ArrayList<>();
+
+ new TreePathScanner<Void, Void>() {
+ @Override
+ public Void visitLambdaExpression(LambdaExpressionTree node, Void p) {
+ Scope scope = Trees.instance(t).getScope(new TreePath(getCurrentPath(), node.getBody()));
+ while (scope.getEnclosingClass() != null) {
+ for (Element el : scope.getLocalElements()) {
+ actual.add(el.getSimpleName() + ":" +el.asType().toString());
+ }
+ scope = scope.getEnclosingScope();
+ }
+ return super.visitLambdaExpression(node, p);
+ }
+ }.scan(cut, null);
+
+ List<String> expectedList = List.of(expected);
+
+ if (!expectedList.equals(actual)) {
+ throw new IllegalStateException("Unexpected scope content: " + actual);
+ }
+ }
+ }
+
+}
+