1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/tests/TestObserverService.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,152 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsISupports.h"
1.10 +#include "nsIComponentManager.h"
1.11 +#include "nsIObserverService.h"
1.12 +#include "nsIObserver.h"
1.13 +#include "nsISimpleEnumerator.h"
1.14 +#include "nsStringGlue.h"
1.15 +#include "nsWeakReference.h"
1.16 +#include "nsComponentManagerUtils.h"
1.17 +#include "mozilla/Attributes.h"
1.18 +
1.19 +#include <stdio.h>
1.20 +
1.21 +static nsIObserverService *anObserverService = nullptr;
1.22 +
1.23 +static void testResult( nsresult rv ) {
1.24 + if ( NS_SUCCEEDED( rv ) ) {
1.25 + printf("...ok\n");
1.26 + } else {
1.27 + printf("...failed, rv=0x%x\n", (int)rv);
1.28 + }
1.29 + return;
1.30 +}
1.31 +
1.32 +void printString(nsString &str) {
1.33 + printf("%s", NS_ConvertUTF16toUTF8(str).get());
1.34 +}
1.35 +
1.36 +class TestObserver MOZ_FINAL : public nsIObserver,
1.37 + public nsSupportsWeakReference
1.38 +{
1.39 +public:
1.40 + TestObserver( const nsAString &name )
1.41 + : mName( name ) {
1.42 + }
1.43 + NS_DECL_ISUPPORTS
1.44 + NS_DECL_NSIOBSERVER
1.45 +
1.46 + nsString mName;
1.47 +
1.48 +private:
1.49 + ~TestObserver() {}
1.50 +};
1.51 +
1.52 +NS_IMPL_ISUPPORTS( TestObserver, nsIObserver, nsISupportsWeakReference )
1.53 +
1.54 +NS_IMETHODIMP
1.55 +TestObserver::Observe( nsISupports *aSubject,
1.56 + const char *aTopic,
1.57 + const char16_t *someData ) {
1.58 + nsCString topic( aTopic );
1.59 + nsString data( someData );
1.60 + /*
1.61 + The annoying double-cast below is to work around an annoying bug in
1.62 + the compiler currently used on wensleydale. This is a test.
1.63 + */
1.64 + printString(mName);
1.65 + printf(" has observed something: subject@%p", (void*)aSubject);
1.66 + printf(" name=");
1.67 + printString(reinterpret_cast<TestObserver*>(reinterpret_cast<void*>(aSubject))->mName);
1.68 + printf(" aTopic=%s", topic.get());
1.69 + printf(" someData=");
1.70 + printString(data);
1.71 + printf("\n");
1.72 + return NS_OK;
1.73 +}
1.74 +
1.75 +int main(int argc, char *argv[])
1.76 +{
1.77 + nsCString topicA; topicA.Assign( "topic-A" );
1.78 + nsCString topicB; topicB.Assign( "topic-B" );
1.79 + nsresult rv;
1.80 +
1.81 + nsresult res = CallCreateInstance("@mozilla.org/observer-service;1", &anObserverService);
1.82 +
1.83 + if (res == NS_OK) {
1.84 +
1.85 + nsIObserver *aObserver = new TestObserver(NS_LITERAL_STRING("Observer-A"));
1.86 + aObserver->AddRef();
1.87 + nsIObserver *bObserver = new TestObserver(NS_LITERAL_STRING("Observer-B"));
1.88 + bObserver->AddRef();
1.89 +
1.90 + printf("Adding Observer-A as observer of topic-A...\n");
1.91 + rv = anObserverService->AddObserver(aObserver, topicA.get(), false);
1.92 + testResult(rv);
1.93 +
1.94 + printf("Adding Observer-B as observer of topic-A...\n");
1.95 + rv = anObserverService->AddObserver(bObserver, topicA.get(), false);
1.96 + testResult(rv);
1.97 +
1.98 + printf("Adding Observer-B as observer of topic-B...\n");
1.99 + rv = anObserverService->AddObserver(bObserver, topicB.get(), false);
1.100 + testResult(rv);
1.101 +
1.102 + printf("Testing Notify(observer-A, topic-A)...\n");
1.103 + rv = anObserverService->NotifyObservers( aObserver,
1.104 + topicA.get(),
1.105 + MOZ_UTF16("Testing Notify(observer-A, topic-A)") );
1.106 + testResult(rv);
1.107 +
1.108 + printf("Testing Notify(observer-B, topic-B)...\n");
1.109 + rv = anObserverService->NotifyObservers( bObserver,
1.110 + topicB.get(),
1.111 + MOZ_UTF16("Testing Notify(observer-B, topic-B)") );
1.112 + testResult(rv);
1.113 +
1.114 + printf("Testing EnumerateObserverList (for topic-A)...\n");
1.115 + nsCOMPtr<nsISimpleEnumerator> e;
1.116 + rv = anObserverService->EnumerateObservers(topicA.get(), getter_AddRefs(e));
1.117 +
1.118 + testResult(rv);
1.119 +
1.120 + printf("Enumerating observers of topic-A...\n");
1.121 + if ( e ) {
1.122 + nsCOMPtr<nsIObserver> observer;
1.123 + bool loop = true;
1.124 + while( NS_SUCCEEDED(e->HasMoreElements(&loop)) && loop)
1.125 + {
1.126 + nsCOMPtr<nsISupports> supports;
1.127 + e->GetNext(getter_AddRefs(supports));
1.128 + observer = do_QueryInterface(supports);
1.129 + printf("Calling observe on enumerated observer ");
1.130 + printString(reinterpret_cast<TestObserver*>
1.131 + (reinterpret_cast<void*>(observer.get()))->mName);
1.132 + printf("...\n");
1.133 + rv = observer->Observe( observer,
1.134 + topicA.get(),
1.135 + MOZ_UTF16("during enumeration") );
1.136 + testResult(rv);
1.137 + }
1.138 + }
1.139 + printf("...done enumerating observers of topic-A\n");
1.140 +
1.141 + printf("Removing Observer-A...\n");
1.142 + rv = anObserverService->RemoveObserver(aObserver, topicA.get());
1.143 + testResult(rv);
1.144 +
1.145 +
1.146 + printf("Removing Observer-B (topic-A)...\n");
1.147 + rv = anObserverService->RemoveObserver(bObserver, topicB.get());
1.148 + testResult(rv);
1.149 + printf("Removing Observer-B (topic-B)...\n");
1.150 + rv = anObserverService->RemoveObserver(bObserver, topicA.get());
1.151 + testResult(rv);
1.152 +
1.153 + }
1.154 + return 0;
1.155 +}
