javaclassoverrides.js revision 174:5eb1427b6a6d 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * published by the Free Software Foundation.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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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 *
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22 */
23
24/**
25 * Check behavior of class-level overrides.
26 *
27 * @test
28 * @run
29 */
30
31
32// Make two classes with class overrides
33
34var R1 = Java.extend(java.lang.Runnable, {
35    run: function() {
36        print("R1.run() invoked")
37    }
38})
39
40var R2 = Java.extend(java.lang.Runnable, {
41    run: function() {
42        print("R2.run() invoked")
43    }
44})
45
46var r1 = new R1
47var r2 = new R2
48// Create one with an instance-override too
49var r3 = new R2(function() { print("r3.run() invoked") })
50
51// Run 'em - we're passing them through a Thread to make sure they indeed
52// are full-blown Runnables
53function runInThread(r) {
54    var t = new java.lang.Thread(r)
55    t.start()
56    t.join()
57}
58runInThread(r1)
59runInThread(r2)
60runInThread(r3)
61
62// Two class-override classes differ
63print("r1.class != r2.class: " + (r1.class != r2.class))
64// However, adding instance-overrides doesn't change the class
65print("r2.class == r3.class: " + (r2.class == r3.class))
66
67function checkAbstract(r) {
68    try {
69        r.run()
70        print("Expected to fail!")
71    } catch(e) {
72        print("Got exception: " + e)
73    }
74}
75
76// Check we're hitting UnsupportedOperationException if neither class
77// overrides nor instance overrides are present
78var RAbstract = Java.extend(java.lang.Runnable, {})
79checkAbstract(new RAbstract()) // class override (empty)
80checkAbstract(new RAbstract() {}) // class+instance override (empty)
81
82// Check we delegate to superclass if neither class
83// overrides nor instance overrides are present
84var ExtendsList = Java.extend(java.util.ArrayList, {})
85print("(new ExtendsList).size() = " + (new ExtendsList).size())
86print("(new ExtendsList(){}).size() = " + (new ExtendsList(){}).size())