diff -r 7e2a1569de76 -r 86d8d242b0c4 langtools/test/tools/javac/lambda/methodReference/SamConversionComboTest.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/langtools/test/tools/javac/lambda/methodReference/SamConversionComboTest.java Sat Nov 17 19:01:03 2012 +0000 @@ -0,0 +1,265 @@ +/* + * Copyright (c) 2012, 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 8003280 + * @summary Add lambda tests + * Test SAM conversion of method references in combinations of different contexts, + * lambda body types(statement/expression), boxing/unboxing etc, to verify + * SAM conversion being conducted successfully as expected. + */ + +import com.sun.source.util.JavacTask; +import java.net.URI; +import java.util.Arrays; +import javax.tools.Diagnostic; +import javax.tools.JavaCompiler; +import javax.tools.JavaFileObject; +import javax.tools.SimpleJavaFileObject; +import javax.tools.ToolProvider; +import javax.tools.StandardJavaFileManager; + +public class SamConversionComboTest { + + enum FInterface { + A("A", "interface A { Integer m(int i); }"), + B("B", "interface B { int m(Integer i); }"), + C("C", "interface C { int m(int i) throws Exception; }"); + + String interfaceType; + String interfaceDef; + + FInterface(String interfaceType, String interfaceDef) { + this.interfaceType = interfaceType; + this.interfaceDef = interfaceDef; + } + } + + enum Context { + ASSIGNMENT("#FType f = #MR;"), + METHOD_CALL("void method1(#FType f) { }\n" + + "void method2() {\n" + + " method1(#MR);\n" + + "}"), + CONSTRUCTOR("X x = new X(#MR);"), + RETURN_OF_METHOD("#FType method1() {\n" + + " return #MR;\n" + + "}"), + ARRAY_INITIALIZER("#FType[] oarray = {#MR};"), + LAMBDA_BODY("#FType f = n -> ((#FType)#MR).m(n);"), + CAST("void test() throws Exception { int n = ((#FType)#MR).m(1); }"), + CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #MR : null;"); + + String context; + + Context(String context) { + this.context = context; + } + + String getContext(FInterface f, MethodReference mr) { + return context.replace("#FType", f.interfaceType).replace("#MR", mr.mrValue); + } + } + + enum MethodReference { + METHOD1("X::method1"), + METHOD2("new X()::method2"), + METHOD3("X::method3"), + METHOD4("new X()::method4"), + METHOD5("new X()::method5"), + METHOD6("X::method6"), + METHOD7("X::method7"), + METHOD8("X::method8"); + + String mrValue; + + MethodReference(String mr) { + mrValue = mr; + } + } + + enum MethodDef { + METHOD1(" static Integer method1(int n) {\n" + + " return n + 1;\n" + + " }\n", 0), + METHOD2(" int method2(Integer n) {\n" + + " return value == 0 ? n + 2 : n + value;\n" + + " }\n", 1), + METHOD3(" static int method3(int n) {\n" + + " return n + 3;\n" + + " }\n", 2), + METHOD4(" Integer method4(Integer n) {\n" + + " return value == 0 ? n + 4 : n + value;\n" + + " }\n", 3), + METHOD5(" Integer method5(Integer n) {\n" + + " return value == 0 ? new Integer(n + 5) : new Integer(n + value);\n" + + " }\n", 4), + METHOD6(" static int method6(Integer n) throws Exception{\n" + + " throw new Exception();\n" + + " }\n", 5), + METHOD7(" static int method7(String s){\n" + + " return s.length();\n" + + " }\n", 6), + METHOD8(" static String method8(Integer n){\n" + + " return n + \"\";\n" + + " }\n", 7); + + String methodStr; + int index; + + MethodDef(String ms, int i) { + methodStr = ms; + index = i; + } + + MethodReference getMethodReference() { + return MethodReference.values()[index]; + } + } + + SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") { + public String toString() { + String interfaces = ""; + for(FInterface fi : FInterface.values()) + interfaces += fi.interfaceDef + "\n"; + return template.replace("#C", interfaces); + } + }; + + String clientTemplate = "class Client {\n" + + " #Context\n" + + "}\n\n" + + + "class X {\n" + + " int value = 0;\n\n" + + + " X() {\n" + + " }\n\n" + + + " X(A a) {\n" + + " value = a.m(9);\n" + + " }\n\n" + + + " X(B b) {\n" + + " value = b.m(9);\n" + + " }\n\n" + + + " X(C c) {\n" + + " try {\n" + + " value = c.m(9);\n" + + " } catch (Exception e){}\n" + + " }\n\n" + + + "#MethodDef" + + "}"; + + SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) { + public String toString() { + return template.replace("#Context", context.getContext(fInterface, methodReference)).replace("#MethodDef", methodDef.methodStr); + } + }; + + boolean checkSamConversion() { + if(methodDef == MethodDef.METHOD7 || methodDef == MethodDef.METHOD8)//method signature mismatch + return false; + if(context != Context.CONSTRUCTOR && fInterface != FInterface.C && methodDef == MethodDef.METHOD6) + //method that throws exceptions not thrown by the interface method is a mismatch + return false; + if(context == Context.CONSTRUCTOR && + methodReference != MethodReference.METHOD1 && + methodReference != MethodReference.METHOD2 && + methodReference != MethodReference.METHOD3)//ambiguous reference + return false; + return true; + } + + void test() throws Exception { + System.out.println("\n===================================="); + System.out.println(fInterface + ", " + context + ", " + methodReference); + System.out.println(samSourceFile + "\n" + clientSourceFile); + + DiagnosticChecker dc = new DiagnosticChecker(); + JavacTask ct = (JavacTask)comp.getTask(null, fm, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile)); + ct.analyze(); + if (dc.errorFound == checkSamConversion()) { + throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile); + } + count++; + } + + abstract class SourceFile extends SimpleJavaFileObject { + + protected String template; + + public SourceFile(String filename, String template) { + super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE); + this.template = template; + } + + @Override + public CharSequence getCharContent(boolean ignoreEncodingErrors) { + return toString(); + } + + public abstract String toString(); + } + + static class DiagnosticChecker implements javax.tools.DiagnosticListener { + + boolean errorFound = false; + + public void report(Diagnostic diagnostic) { + if (diagnostic.getKind() == Diagnostic.Kind.ERROR) { + errorFound = true; + } + } + } + + FInterface fInterface; + Context context; + MethodDef methodDef; + MethodReference methodReference; + static int count = 0; + + static JavaCompiler comp = ToolProvider.getSystemJavaCompiler(); + static StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null); + + SamConversionComboTest(FInterface f, Context c, MethodDef md) { + fInterface = f; + context = c; + methodDef = md; + methodReference = md.getMethodReference(); + } + + public static void main(String[] args) throws Exception { + for(Context ct : Context.values()) { + for (FInterface fi : FInterface.values()) { + for (MethodDef md: MethodDef.values()) { + new SamConversionComboTest(fi, ct, md).test(); + } + } + } + System.out.println("total tests: " + count); + } +}