Sat, 17 Nov 2012 19:01:03 +0000
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 7115050
27 * @bug 8003280
28 * @summary Add lambda tests
29 * Add parser support for lambda expressions
30 */
32 import com.sun.source.util.JavacTask;
33 import java.net.URI;
34 import java.util.Arrays;
35 import javax.tools.Diagnostic;
36 import javax.tools.JavaCompiler;
37 import javax.tools.JavaFileObject;
38 import javax.tools.SimpleJavaFileObject;
39 import javax.tools.StandardJavaFileManager;
40 import javax.tools.ToolProvider;
42 public class LambdaParserTest {
44 static int checkCount = 0;
46 enum LambdaKind {
47 NILARY_EXPR("()->x"),
48 NILARY_STMT("()->{ return x; }"),
49 ONEARY_SHORT_EXPR("x->x"),
50 ONEARY_SHORT_STMT("x->{ return x; }"),
51 ONEARY_EXPR("(#M1 #T1 x)->x"),
52 ONEARY_STMT("(#M1 #T1 x)->{ return x; }"),
53 TWOARY_EXPR("(#M1 #T1 x, #M2 #T2 y)->x"),
54 TWOARY_STMT("(#M1 #T1 x, #M2 #T2 y)->{ return x; }");
56 String lambdaTemplate;
58 LambdaKind(String lambdaTemplate) {
59 this.lambdaTemplate = lambdaTemplate;
60 }
62 String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
63 ModifierKind mk1, ModifierKind mk2) {
64 return lambdaTemplate.replaceAll("#M1", mk1.modifier)
65 .replaceAll("#M2", mk2.modifier)
66 .replaceAll("#T1", pk1.parameterType)
67 .replaceAll("#T2", pk2.parameterType);
68 }
70 int arity() {
71 switch (this) {
72 case NILARY_EXPR:
73 case NILARY_STMT: return 0;
74 case ONEARY_SHORT_EXPR:
75 case ONEARY_SHORT_STMT:
76 case ONEARY_EXPR:
77 case ONEARY_STMT: return 1;
78 case TWOARY_EXPR:
79 case TWOARY_STMT: return 2;
80 default: throw new AssertionError("Invalid lambda kind " + this);
81 }
82 }
84 boolean isShort() {
85 return this == ONEARY_SHORT_EXPR ||
86 this == ONEARY_SHORT_STMT;
87 }
88 }
90 enum LambdaParameterKind {
91 IMPLICIT(""),
92 EXPLIICT_SIMPLE("A"),
93 EXPLICIT_VARARGS("A..."),
94 EXPLICIT_GENERIC1("A<X>"),
95 EXPLICIT_GENERIC3("A<? extends X, ? super Y>");
97 String parameterType;
99 LambdaParameterKind(String parameterType) {
100 this.parameterType = parameterType;
101 }
103 boolean explicit() {
104 return this != IMPLICIT;
105 }
106 }
108 enum ModifierKind {
109 NONE(""),
110 FINAL("final"),
111 PUBLIC("public");
113 String modifier;
115 ModifierKind(String modifier) {
116 this.modifier = modifier;
117 }
119 boolean compatibleWith(LambdaParameterKind pk) {
120 switch (this) {
121 case PUBLIC: return false;
122 case FINAL: return pk != LambdaParameterKind.IMPLICIT;
123 case NONE: return true;
124 default: throw new AssertionError("Invalid modifier kind " + this);
125 }
126 }
127 }
129 enum ExprKind {
130 NONE("#L#S"),
131 SINGLE_PAREN1("(#L#S)"),
132 SINGLE_PAREN2("(#L)#S"),
133 DOUBLE_PAREN1("((#L#S))"),
134 DOUBLE_PAREN2("((#L)#S)"),
135 DOUBLE_PAREN3("((#L))#S");
137 String expressionTemplate;
139 ExprKind(String expressionTemplate) {
140 this.expressionTemplate = expressionTemplate;
141 }
143 String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
144 ModifierKind mk1, ModifierKind mk2, LambdaKind lk, SubExprKind sk) {
145 return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2))
146 .replaceAll("#S", sk.subExpression);
147 }
148 }
150 enum SubExprKind {
151 NONE(""),
152 SELECT_FIELD(".f"),
153 SELECT_METHOD(".f()"),
154 SELECT_NEW(".new Foo()"),
155 POSTINC("++"),
156 POSTDEC("--");
158 String subExpression;
160 SubExprKind(String subExpression) {
161 this.subExpression = subExpression;
162 }
163 }
165 public static void main(String... args) throws Exception {
167 //create default shared JavaCompiler - reused across multiple compilations
168 JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
169 StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
171 for (LambdaKind lk : LambdaKind.values()) {
172 for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
173 if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT) continue;
174 for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
175 if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT) continue;
176 for (ModifierKind mk1 : ModifierKind.values()) {
177 if (mk1 != ModifierKind.NONE && lk.isShort()) continue;
178 if (lk.arity() < 1 && mk1 != ModifierKind.NONE) continue;
179 for (ModifierKind mk2 : ModifierKind.values()) {
180 if (lk.arity() < 2 && mk2 != ModifierKind.NONE) continue;
181 for (SubExprKind sk : SubExprKind.values()) {
182 for (ExprKind ek : ExprKind.values()) {
183 new LambdaParserTest(pk1, pk2, mk1, mk2, lk, sk, ek)
184 .run(comp, fm);
185 }
186 }
187 }
188 }
189 }
190 }
191 }
192 System.out.println("Total check executed: " + checkCount);
193 }
195 LambdaParameterKind pk1;
196 LambdaParameterKind pk2;
197 ModifierKind mk1;
198 ModifierKind mk2;
199 LambdaKind lk;
200 SubExprKind sk;
201 ExprKind ek;
202 JavaSource source;
203 DiagnosticChecker diagChecker;
205 LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2, ModifierKind mk1,
206 ModifierKind mk2, LambdaKind lk, SubExprKind sk, ExprKind ek) {
207 this.pk1 = pk1;
208 this.pk2 = pk2;
209 this.mk1 = mk1;
210 this.mk2 = mk2;
211 this.lk = lk;
212 this.sk = sk;
213 this.ek = ek;
214 this.source = new JavaSource();
215 this.diagChecker = new DiagnosticChecker();
216 }
218 class JavaSource extends SimpleJavaFileObject {
220 String template = "class Test {\n" +
221 " SAM s = #E;\n" +
222 "}";
224 String source;
226 public JavaSource() {
227 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
228 source = template.replaceAll("#E", ek.expressionString(pk1, pk2, mk1, mk2, lk, sk));
229 }
231 @Override
232 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
233 return source;
234 }
235 }
237 void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
238 JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
239 null, null, Arrays.asList(source));
240 try {
241 ct.parse();
242 } catch (Throwable ex) {
243 throw new AssertionError("Error thrown when parsing the following source:\n" + source.getCharContent(true));
244 }
245 check();
246 }
248 void check() {
249 checkCount++;
251 boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
252 (lk.arity() > 1 && !mk2.compatibleWith(pk2));
254 if (lk.arity() == 2 &&
255 (pk1.explicit() != pk2.explicit() ||
256 pk1 == LambdaParameterKind.EXPLICIT_VARARGS)) {
257 errorExpected = true;
258 }
260 if (errorExpected != diagChecker.errorFound) {
261 throw new Error("invalid diagnostics for source:\n" +
262 source.getCharContent(true) +
263 "\nFound error: " + diagChecker.errorFound +
264 "\nExpected error: " + errorExpected);
265 }
266 }
268 static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
270 boolean errorFound;
272 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
273 if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
274 errorFound = true;
275 }
276 }
277 }
278 }