javaarrayconversion.js revision 1427:31f1156a592b
1/* 2 * Copyright (c) 2010, 2013, 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 * Tests for conversion of JavaScript arrays to Java arrays and the other 26 * way round. Also generally useful as a JavaScript-to-Java type conversion 27 * test. 28 * 29 * @test 30 * @run 31 */ 32 33var x; // used for undefined 34var testCount = 0; 35 36function testF(inputValue, type, testFn) { 37 var x = Java.to([inputValue], type + "[]")[0]; 38 if(!testFn(x)) { 39 throw ("unexpected value: " + x) 40 } 41 ++testCount; 42} 43 44function test(inputValue, type, expectedValue) { 45 testF(inputValue, type, function(x) { return x === expectedValue }) 46} 47 48function testNaN(inputValue, type) { 49 testF(inputValue, type, isNaN) 50} 51 52// Those labeled "Correct?" are not clearly correct conversions. Those 53// labeled "TypeError maybe?" could actually throw a TypeError, or only 54// throw a TypeError when in strict mode. 55// The case of ("false", "boolean") => true is particularly amusing. 56 57test(x, "int", 0) // Correct? TypeError maybe? 58test(null, "int", 0) // Correct? TypeError maybe? 59test(1234, "int", 1234) 60test("1234", "int", 1234) 61test("1234.49", "int", 1234) 62test("1234.51", "int", 1234) // truncates, not rounds 63test(true, "int", 1) 64test(false, "int", 0) 65test("foo", "int", 0) // Correct? TypeError maybe? 66 67test(x, "boolean", false) // Correct? TypeError maybe? 68test(null, "boolean", false) // Correct? TypeError maybe? 69test(0, "boolean", false) 70test(1234, "boolean", true) 71test("foo", "boolean", true) 72test("", "boolean", false) 73test("false", "boolean", true) // Correct? false maybe? 74 75test(x, "java.lang.String", "undefined") // Correct? TypeError maybe? 76test(null, "java.lang.String", null) 77test(1234, "java.lang.String", "1234") 78test(1234.5, "java.lang.String", "1234.5") 79test(true, "java.lang.String", "true") 80test(false, "java.lang.String", "false") 81 82test(x, "java.lang.Integer", null) // Correct? TypeError maybe? 83test(null, "java.lang.Integer", null) 84test(1234, "java.lang.Integer", 1234) 85test("1234", "java.lang.Integer", 1234) 86test("1234.49", "java.lang.Integer", 1234) 87test("1234.51", "java.lang.Integer", 1234) // truncates, not rounds 88test(true, "java.lang.Integer", 1) 89test(false, "java.lang.Integer", 0) 90test("foo", "java.lang.Integer", 0) // Correct? TypeError maybe? 91 92test(x, "java.lang.Boolean", null) // Correct? TypeError maybe? 93test(null, "java.lang.Boolean", null) 94test(0, "java.lang.Boolean", false) 95test(1234, "java.lang.Boolean", true) 96test("foo", "java.lang.Boolean", true) 97test("", "java.lang.Boolean", false) 98test("false", "java.lang.Boolean", true) // Correct? false maybe? 99 100testNaN(x, "double") 101test(null, "double", 0) 102test(1234, "double", 1234) 103test("1234", "double", 1234) 104test("1234.5", "double", 1234.5) 105test(true, "double", 1) 106test(false, "double", 0) 107testNaN("foo", "double") 108 109testNaN(x, "java.lang.Double") 110test(null, "java.lang.Double", null) 111test(1234, "java.lang.Double", 1234) 112test("1234", "java.lang.Double", 1234) 113test("1234.5", "java.lang.Double", 1234.5) 114test(true, "java.lang.Double", 1) 115test(false, "java.lang.Double", 0) 116testNaN("foo", "java.lang.Double") 117 118test({ valueOf: function() { return 42; } }, "int", 42) 119test({ valueOf: function() { return "42"; } }, "int", 42) 120// If there's no valueOf, toString is used 121test({ toString: function() { return "42"; } }, "int", 42) 122// For numbers, valueOf takes precedence over toString 123test({ valueOf: function() { return "42"; }, toString: function() { return "43"; } }, "int", 42) 124 125test({ toString: function() { return "foo"; } }, "java.lang.String", "foo") 126// Yep, even if we have valueOf, toString from prototype takes precedence 127test({ valueOf: function() { return 42; } }, "java.lang.String", "[object Object]") 128// Converting to string, toString takes precedence over valueOf 129test({ valueOf: function() { return "42"; }, toString: function() { return "43"; } }, "java.lang.String", "43") 130 131function assertCanConvert(sourceType, targetType) { 132 Java.to([new (Java.type(sourceType))()], targetType + "[]") 133 ++testCount; 134} 135 136function assertCantConvert(sourceType, targetType) { 137 try { 138 Java.to([new (Java.type(sourceType))()], targetType + "[]") 139 throw "no TypeError encountered" 140 } catch(e) { 141 if(!(e instanceof TypeError) || 142 !e.message.startsWith("Java.to conversion to array type")) { 143 throw e; 144 } 145 ++testCount; 146 } 147} 148 149// Arbitrary POJOs to JS Primitive type should work 150assertCanConvert("java.util.BitSet", "int") 151assertCanConvert("java.util.BitSet", "double") 152assertCanConvert("java.util.BitSet", "long") 153assertCanConvert("java.util.BitSet", "boolean") 154assertCanConvert("java.util.BitSet", "java.lang.String") 155 156// Arbitrary POJOs can't be converted to Java values 157assertCantConvert("java.util.BitSet", "java.lang.Double") 158assertCantConvert("java.util.BitSet", "java.lang.Long") 159 160/*************************************************************************** 161 * Now testing the other way round - Java arrays & collections to JavaScript 162 **************************************************************************/ 163 164function assert(x) { 165 if(!x) { 166 throw "Assertion failed" 167 } 168 ++testCount; 169} 170 171var intArray = new (Java.type("int[]"))(3) 172intArray[0] = 1234; 173intArray[1] = 42; 174intArray[2] = 5; 175var jsIntArray = Java.from(intArray) 176assert(jsIntArray instanceof Array); 177assert(jsIntArray[0] === 1234); 178assert(jsIntArray[1] === 42); 179assert(jsIntArray[2] === 5); 180 181// The arrays are copies, they don't reflect each other 182intArray[2] = 6; 183assert(jsIntArray[2] === 5); 184jsIntArray[2] = 7; 185assert(intArray[2] === 6); 186 187var byteArray = new (Java.type("byte[]"))(2) 188byteArray[0] = -128; 189byteArray[1] = 127; 190var jsByteArray = Java.from(byteArray) 191assert(jsByteArray instanceof Array); 192assert(jsByteArray[0] === -128); 193assert(jsByteArray[1] === 127); 194 195var shortArray = new (Java.type("short[]"))(2) 196shortArray[0] = -32768; 197shortArray[1] = 32767; 198var jsShortArray = Java.from(shortArray) 199assert(jsShortArray instanceof Array); 200assert(jsShortArray[0] === -32768); 201assert(jsShortArray[1] === 32767); 202 203var floatArray = new (Java.type("float[]"))(2) 204floatArray[0] = java.lang.Float.MIN_VALUE; 205floatArray[1] = java.lang.Float.MAX_VALUE; 206var jsFloatArray = Java.from(floatArray) 207assert(jsFloatArray instanceof Array); 208assert(jsFloatArray[0] == java.lang.Float.MIN_VALUE); 209assert(jsFloatArray[1] == java.lang.Float.MAX_VALUE); 210 211var charArray = new (Java.type("char[]"))(3) 212charArray[0] = "a"; 213charArray[1] = "b"; 214charArray[2] = "1"; 215var jsCharArray = Java.from(charArray) 216assert(jsCharArray instanceof Array); 217assert(jsCharArray[0] === 97); 218assert(jsCharArray[1] === 98); 219assert(jsCharArray[2] === 49); 220 221var booleanArray = new (Java.type("boolean[]"))(2) 222booleanArray[0] = true; 223booleanArray[1] = false; 224var jsBooleanArray = Java.from(booleanArray) 225assert(jsBooleanArray instanceof Array); 226assert(jsBooleanArray[0] === true); 227assert(jsBooleanArray[1] === false); 228 229print(testCount + " tests completed ok") 230