diff -r 000000000000 -r 959103a6100f test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java Wed Apr 27 01:34:52 2016 +0800 @@ -0,0 +1,280 @@ +/* + * Copyright (c) 2011, 2014, 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 lambda expressions in combinations of different contexts, + * lambda body types(statement/expression), explict/implicit target type 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; + +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(Integer i) throws Exception; }"); + + String interfaceType; + String interfaceDef; + + FInterface(String interfaceType, String interfaceDef) { + this.interfaceType = interfaceType; + this.interfaceDef = interfaceDef; + } + + String getParameterType() { + switch(this) { + case A: + return "int"; + case B: + case C: + return "Integer"; + default: + return null; + } + } + } + + enum Context { + ASSIGNMENT("#FType f = #LBody;"), + METHOD_CALL("void method1(#FType f) { }\n" + + " void method2() {\n" + + " method1(#LBody);\n" + + " }"), + CONSTRUCTOR("X x = new X(#LBody);"), + RETURN_OF_METHOD("#FType method1() {\n" + + " return #LBody;\n" + + "}"), + ARRAY_INITIALIZER("Object[] oarray = {\"a\", 1, (#FType)#LBody};"), + LAMBDA_BODY("#FType f = n -> ((#FType)#LBody).m(n);"), + CAST("void test() throws Exception { int n = ((#FType)#LBody).m(1); }"), + CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #LBody : null;"); + + String context; + + Context(String context) { + this.context = context; + } + + String getContext(FInterface f, LambdaKind lk, LambdaBody lb, ReturnValue rv) { + return context.replace("#FType", f.interfaceType).replace("#LBody", lb.getLambdaBody(f, lk, rv)); + } + } + + enum LambdaKind { + EXPRESSION("#VAL"), + STATEMENT("{return #VAL;}"), + EXCEPTION_STMT("{throw new Exception();}"); + + String stmt; + + LambdaKind(String stmt) { + this.stmt = stmt; + } + } + + enum ReturnValue { + INT("i + 1"), + INTEGER("new Integer(i+1)"), + INT2("i.intValue() + 1"), + STRING("i + \"\""), + DOUBLE("i * 1.0"); + + String rValue; + + ReturnValue(String rValue) { + this.rValue = rValue; + } + } + + enum LambdaBody { + IMPLICIT("i -> #RET"),//type inferred + EXPLICIT("(#Type i) -> #RET");//explicit type + + String bodyStr; + + LambdaBody(String bodyStr) { + this.bodyStr = bodyStr; + } + + String getLambdaBody(FInterface fi, LambdaKind lk, ReturnValue rv) { + return bodyStr.replace("#Type", fi.getParameterType()).replace("#RET", lk.stmt.replace("#VAL", rv.rValue)); + } + } + + boolean checkSamConversion() { + if(lambdaKind != LambdaKind.EXCEPTION_STMT && (returnValue == ReturnValue.DOUBLE || returnValue == ReturnValue.STRING)) //return type mismatch + return false; + if(context != Context.CONSTRUCTOR) {//context other than construcotr argument + if(fInterface != FInterface.C && lambdaKind == LambdaKind.EXCEPTION_STMT) + return false; + if(fInterface == FInterface.A && returnValue == ReturnValue.INT2) + return false; + } + else { //constructor argument context + //match X(A a) or X(B b) or X(C c) + if (lambdaKind == LambdaKind.EXCEPTION_STMT) { + return false; //ambiguous target type + } + else if(lambdaBody == LambdaBody.IMPLICIT) { + return false; + } + else { //explicit parameter type + if(fInterface.getParameterType().equals("Integer")) //ambiguous target type + //e.g. X x = new X((Integer i) -> i + 1); + return false; + if(returnValue == ReturnValue.INT2) + //e.g. X x = new X(int i -> i.intValue() + 1); + return false; + } + } + return true; + } + + 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(A a) {\n" + + " value = a.m(6);\n" + + " }\n\n" + + + " X(B b) {\n" + + " value = b.m(7);\n" + + " }\n\n" + + + " X(C c) {\n" + + " try {\n" + + " value = c.m(8);\n" + + " } catch (Exception e){}\n" + + " }\n" + + "}"; + SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) { + public String toString() { + return template.replace("#Context", context.getContext(fInterface, lambdaKind, lambdaBody, returnValue)); + } + }; + + void test() throws Exception { + System.out.println("\n===================================="); + System.out.println(fInterface + ", " + context + ", " + lambdaKind + ", " + lambdaBody + ", " + returnValue); + System.out.println(samSourceFile + "\n"); + String clientFileStr = clientSourceFile.toString(); + System.out.println(clientFileStr.substring(0, clientFileStr.indexOf("\n\n"))); + + final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); + DiagnosticChecker dc = new DiagnosticChecker(); + JavacTask ct = (JavacTask)tool.getTask(null, null, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile)); + try { + ct.analyze(); + } catch (Exception e) { + throw new AssertionError("failing SAM source file \n" + samSourceFile + "\n\n" + "failing client source file \n"+ clientSourceFile); + } + 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; + LambdaBody lambdaBody; + LambdaKind lambdaKind; + ReturnValue returnValue; + static int count = 0; + + SamConversionComboTest(FInterface f, Context c, LambdaBody lb, LambdaKind lk, ReturnValue rv) { + fInterface = f; + context = c; + lambdaKind = lk; + lambdaBody = lb; + returnValue = rv; + } + + public static void main(String[] args) throws Exception { + for(Context ct : Context.values()) { + for (FInterface fi : FInterface.values()) { + for (LambdaKind lk: LambdaKind.values()) { + for (LambdaBody lb : LambdaBody.values()) { + for(ReturnValue rv : ReturnValue.values()) { + new SamConversionComboTest(fi, ct, lb, lk, rv).test(); + } + } + } + } + } + System.out.println("total tests: " + count); + } +}