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test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java@01c9d4161882
test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java
Sat, 17 Nov 2012 19:01:03 +0000
- author
- mcimadamore
- date
- Sat, 17 Nov 2012 19:01:03 +0000
- changeset 1415
- 01c9d4161882
- child 1510
- 7873d37f5b37
- permissions
- -rw-r--r--
8003280: Add lambda tests
Summary: Turn on lambda expression, method reference and default method support
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /**
25 * @test
26 * @bug 8003280
27 * @summary Add lambda tests
28 * Test SAM conversion of lambda expressions in combinations of different contexts,
29 * lambda body types(statement/expression), explict/implicit target type etc, to verify
30 * SAM conversion being conducted successfully as expected.
31 */
33 import com.sun.source.util.JavacTask;
34 import java.net.URI;
35 import java.util.Arrays;
36 import javax.tools.Diagnostic;
37 import javax.tools.JavaCompiler;
38 import javax.tools.JavaFileObject;
39 import javax.tools.SimpleJavaFileObject;
40 import javax.tools.ToolProvider;
42 public class SamConversionComboTest {
44 enum FInterface {
45 A("A", "interface A { Integer m(int i); }"),
46 B("B", "interface B { int m(Integer i); }"),
47 C("C", "interface C { int m(Integer i) throws Exception; }");
49 String interfaceType;
50 String interfaceDef;
52 FInterface(String interfaceType, String interfaceDef) {
53 this.interfaceType = interfaceType;
54 this.interfaceDef = interfaceDef;
55 }
57 String getParameterType() {
58 switch(this) {
59 case A:
60 return "int";
61 case B:
62 case C:
63 return "Integer";
64 default:
65 return null;
66 }
67 }
68 }
70 enum Context {
71 ASSIGNMENT("#FType f = #LBody;"),
72 METHOD_CALL("void method1(#FType f) { }\n" +
73 " void method2() {\n" +
74 " method1(#LBody);\n" +
75 " }"),
76 CONSTRUCTOR("X x = new X(#LBody);"),
77 RETURN_OF_METHOD("#FType method1() {\n" +
78 " return #LBody;\n" +
79 "}"),
80 ARRAY_INITIALIZER("Object[] oarray = {\"a\", 1, (#FType)#LBody};"),
81 LAMBDA_BODY("#FType f = n -> ((#FType)#LBody).m(n);"),
82 CAST("void test() throws Exception { int n = ((#FType)#LBody).m(1); }"),
83 CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #LBody : null;");
85 String context;
87 Context(String context) {
88 this.context = context;
89 }
91 String getContext(FInterface f, LambdaKind lk, LambdaBody lb, ReturnValue rv) {
92 return context.replace("#FType", f.interfaceType).replace("#LBody", lb.getLambdaBody(f, lk, rv));
93 }
94 }
96 enum LambdaKind {
97 EXPRESSION("#VAL"),
98 STATEMENT("{return #VAL;}"),
99 EXCEPTION_STMT("{throw new Exception();}");
101 String stmt;
103 LambdaKind(String stmt) {
104 this.stmt = stmt;
105 }
106 }
108 enum ReturnValue {
109 INT("i + 1"),
110 INTEGER("new Integer(i+1)"),
111 INT2("i.intValue() + 1"),
112 STRING("i + \"\""),
113 DOUBLE("i * 1.0");
115 String rValue;
117 ReturnValue(String rValue) {
118 this.rValue = rValue;
119 }
120 }
122 enum LambdaBody {
123 IMPLICIT("i -> #RET"),//type inferred
124 EXPLICIT("(#Type i) -> #RET");//explicit type
126 String bodyStr;
128 LambdaBody(String bodyStr) {
129 this.bodyStr = bodyStr;
130 }
132 String getLambdaBody(FInterface fi, LambdaKind lk, ReturnValue rv) {
133 return bodyStr.replace("#Type", fi.getParameterType()).replace("#RET", lk.stmt.replace("#VAL", rv.rValue));
134 }
135 }
137 boolean checkSamConversion() {
138 if(lambdaKind != LambdaKind.EXCEPTION_STMT && (returnValue == ReturnValue.DOUBLE || returnValue == ReturnValue.STRING)) //return type mismatch
139 return false;
140 if(context != Context.CONSTRUCTOR) {//context other than construcotr argument
141 if(fInterface != FInterface.C && lambdaKind == LambdaKind.EXCEPTION_STMT)
142 return false;
143 if(fInterface == FInterface.A && returnValue == ReturnValue.INT2)
144 return false;
145 }
146 else { //constructor argument context
147 //match X(A a) or X(B b) or X(C c)
148 if (lambdaKind == LambdaKind.EXCEPTION_STMT) {
149 return false; //ambiguous target type
150 }
151 else if(lambdaBody == LambdaBody.IMPLICIT) {
152 if(returnValue != ReturnValue.INTEGER) //ambiguous target type
153 return false;
154 }
155 else { //explicit parameter type
156 if(fInterface.getParameterType().equals("Integer")) //ambiguous target type
157 //e.g. X x = new X((Integer i) -> i + 1);
158 return false;
159 if(returnValue == ReturnValue.INT2)
160 //e.g. X x = new X(int i -> i.intValue() + 1);
161 return false;
162 }
163 }
164 return true;
165 }
167 SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") {
168 public String toString() {
169 String interfaces = "";
170 for(FInterface fi : FInterface.values())
171 interfaces += fi.interfaceDef + "\n";
172 return template.replace("#C", interfaces);
173 }
174 };
176 String clientTemplate = "class Client {\n" +
177 " #Context\n" +
178 "}\n\n" +
180 "class X {\n" +
181 " int value = 0;\n\n" +
183 " X(A a) {\n" +
184 " value = a.m(6);\n" +
185 " }\n\n" +
187 " X(B b) {\n" +
188 " value = b.m(7);\n" +
189 " }\n\n" +
191 " X(C c) {\n" +
192 " try {\n" +
193 " value = c.m(8);\n" +
194 " } catch (Exception e){}\n" +
195 " }\n" +
196 "}";
197 SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) {
198 public String toString() {
199 return template.replace("#Context", context.getContext(fInterface, lambdaKind, lambdaBody, returnValue));
200 }
201 };
203 void test() throws Exception {
204 System.out.println("\n====================================");
205 System.out.println(fInterface + ", " + context + ", " + lambdaKind + ", " + lambdaBody + ", " + returnValue);
206 System.out.println(samSourceFile + "\n");
207 String clientFileStr = clientSourceFile.toString();
208 System.out.println(clientFileStr.substring(0, clientFileStr.indexOf("\n\n")));
210 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
211 DiagnosticChecker dc = new DiagnosticChecker();
212 JavacTask ct = (JavacTask)tool.getTask(null, null, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile));
213 ct.analyze();
214 if (dc.errorFound == checkSamConversion()) {
215 throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile);
216 }
217 count++;
218 }
220 abstract class SourceFile extends SimpleJavaFileObject {
222 protected String template;
224 public SourceFile(String filename, String template) {
225 super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
226 this.template = template;
227 }
229 @Override
230 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
231 return toString();
232 }
234 public abstract String toString();
235 }
237 static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
239 boolean errorFound = false;
241 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
242 if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
243 errorFound = true;
244 }
245 }
246 }
248 FInterface fInterface;
249 Context context;
250 LambdaBody lambdaBody;
251 LambdaKind lambdaKind;
252 ReturnValue returnValue;
253 static int count = 0;
255 SamConversionComboTest(FInterface f, Context c, LambdaBody lb, LambdaKind lk, ReturnValue rv) {
256 fInterface = f;
257 context = c;
258 lambdaKind = lk;
259 lambdaBody = lb;
260 returnValue = rv;
261 }
263 public static void main(String[] args) throws Exception {
264 for(Context ct : Context.values()) {
265 for (FInterface fi : FInterface.values()) {
266 for (LambdaKind lk: LambdaKind.values()) {
267 for (LambdaBody lb : LambdaBody.values()) {
268 for(ReturnValue rv : ReturnValue.values()) {
269 new SamConversionComboTest(fi, ct, lb, lk, rv).test();
270 }
271 }
272 }
273 }
274 }
275 System.out.println("total tests: " + count);
276 }
277 }
