01: /**
02: * Copyright (C) 2006 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */package com.google.inject;
16:
17: import junit.framework.TestCase;
18:
19: /**
20: * @author crazybob@google.com (Bob Lee)
21: */
22: public class CircularDependencyTest extends TestCase {
23:
24: public void testCircularlyDependentConstructors()
25: throws CreationException {
26: BinderImpl builder = new BinderImpl();
27: builder.bind(A.class).to(AImpl.class);
28: builder.bind(B.class).to(BImpl.class);
29:
30: Injector injector = builder.createInjector();
31: A a = injector.getInstance(A.class);
32: assertNotNull(a.getB().getA());
33: }
34:
35: interface A {
36: B getB();
37: }
38:
39: @Singleton
40: static class AImpl implements A {
41: final B b;
42:
43: @Inject
44: public AImpl(B b) {
45: this .b = b;
46: }
47:
48: public B getB() {
49: return b;
50: }
51: }
52:
53: interface B {
54: A getA();
55: }
56:
57: static class BImpl implements B {
58: final A a;
59:
60: @Inject
61: public BImpl(A a) {
62: this .a = a;
63: }
64:
65: public A getA() {
66: return a;
67: }
68: }
69:
70: }
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