Sample XPCOM Application

xpcom/sample/program/nsTestSample.cpp

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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ *   Suresh Duddi <dp@netscape.com>
+ */
+
+
+/**
+ * A Test application that exercises the sample moudule. This is intented
+ * to be a sample application for using xpcom standalone.
+ */
+
+#include <nsISample.h>
+#include <nsIServiceManager.h>
+#include <nsXPIDLString.h>
+
+main()
+{
+    nsresult rv;
+
+    // Initialize XPCOM
+    rv = NS_InitXPCOM(nsnull, nsnull);
+    if (NS_FAILED(rv))
+    {
+        printf("ERROR: XPCOM intialization error [%x].\n", rv);
+        return -1;
+    }
+
+    // Do Autoreg to make sure our component is registered. The real way of
+    // doing this is running the xpcom registraion tool, regxpcom, at install
+    // time to get components registered and not make this call everytime.
+    // Ignore return value.
+    //
+    // Here we use the global component manager. Note that this will cause
+    // linkage dependency to XPCOM library. We feel that linkage dependency
+    // to XPCOM is inevitable and this is simpler to code.
+    // To break free from such dependencies, we can GetService() the component
+    // manager from the service manager that is returned from NS_InitXPCOM().
+    // We feel that linkage dependency to XPCOM library is inevitable.
+    (void) nsComponentManager::AutoRegister(nsIComponentManager::NS_Startup, nsnull);
+
+    // Create an instance of our component
+    nsCOMPtr<nsISample> mysample = do_CreateInstance(NS_SAMPLE_PROGID, &rv);
+    if (NS_FAILED(rv))
+    {
+        printf("ERROR: Cannot create instance of component " NS_SAMPLE_PROGID " [%x].\n"
+               "Debugging hint:\n"
+               "\tsetenv NSPR_LOG_MODULES nsComponentManager:5\n"
+               "\tsetenv NSPR_LOG_FILE xpcom.log\n"
+               "\t./nsTestSample\n"
+               "\t<check the contents for xpcom.log for possible cause of error>.\n",
+               rv);
+        return -2;
+    }
+
+    // Call methods on our sample to test it out.
+    rv = mysample->WriteValue("Inital print:");
+    if (NS_FAILED(rv))
+    {
+        printf("ERROR: Calling nsISample::WriteValue() [%x]\n", rv);
+        return -3;
+    }
+
+    const char *testValue = "XPCOM defies gravity";
+    rv = mysample->SetValue(testValue);
+    if (NS_FAILED(rv))
+    {
+        printf("ERROR: Calling nsISample::SetValue() [%x]\n", rv);
+        return -3;
+    }
+    printf("Set value to: %s\n", testValue);
+    nsXPIDLCString str;
+    rv = mysample->GetValue(getter_Copies(str));
+    if (NS_FAILED(rv))
+    {
+        printf("ERROR: Calling nsISample::GetValue() [%x]\n", rv);
+        return -3;
+    }
+    if (strcmp(str, testValue))
+    {
+        printf("Test FAILED.\n");
+        return -4;
+    }
+    rv = mysample->WriteValue("Final print :");
+    printf("Test passed.\n");
+
+    // Shutdown XPCOM
+    NS_ShutdownXPCOM(nsnull);
+    return 0;
+}