1 /* 2 * Copyright (c) 2015, 2016, 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 */ 23 24 /* 25 * @test 26 * @bug 8131027 27 * @summary Test Type Inference 28 * @library /tools/lib 29 * @modules jdk.compiler/com.sun.tools.javac.api 30 * jdk.compiler/com.sun.tools.javac.main 31 * jdk.jdeps/com.sun.tools.javap 32 * @build KullaTesting TestingInputStream toolbox.ToolBox Compiler 33 * @run testng InferTypeTest 34 */ 35 36 import org.testng.annotations.Test; 37 38 @Test 39 public class InferTypeTest extends KullaTesting { 40 testTypeInference()41 public void testTypeInference() { 42 assertInferredType("1", "int"); 43 assertEval("import java.util.*;"); 44 assertInferredType("new ArrayList<String>()", "ArrayList<String>"); 45 assertInferredType("null", "Object"); 46 assertInferredType("1 + ", null); //incomplete 47 assertInferredType("undef", null); //unresolvable 48 assertEval("List<String> l1;"); 49 assertEval("List<? extends String> l2;"); 50 assertEval("List<? super String> l3;"); 51 assertInferredType("l1", "List<String>"); 52 assertInferredType("l2", "List<? extends String>"); 53 assertInferredType("l3", "List<? super String>"); 54 assertInferredType("l1.get(0)", "String"); 55 assertInferredType("l2.get(0)", "String"); 56 assertInferredType("l3.get(0)", "Object"); 57 assertInferredType("\"\" + 1", "String"); 58 assertEval("int i = 0;"); 59 assertInferredType("i++", "int"); 60 assertInferredType("++i", "int"); 61 assertInferredType("i == 0 ? l1.get(0) : l2.get(0)", "String"); 62 assertInferredType("", null); 63 assertInferredType("void test() { }", null); 64 assertInferredType("class Test { }", null); 65 assertInferredType("enum Test { A; }", null); 66 assertInferredType("interface Test { }", null); 67 assertInferredType("@interface Test { }", null); 68 assertInferredType("Object o;", null); 69 } 70 71 } 72