Updated installer with custom action

installer/src/installer-lib/test/property_test.cpp

+#include <gtest/gtest.h>
+
+#include "../database.h"
+#include "../property.h"
+
+TEST( Property_Test, null )
+{
+  /*
+   * This is an extract of manual test code originally run from abp_close_ie DLL entry point.
+   * This code relies on an MSI database opened for installation, which we don't need to access properties.
+   * We can instead use an offline session, with the database opened outside Windows Installer.
+   */
+  /*
+   * DISABLED. Refactor into proper tests.
+   */
+  if ( false )
+  {
+    // This variable was the argument to the entry point.
+    MSIHANDLE session_handle = 0;
+
+    // The code in the body.
+    Immediate_Session session( session_handle, "abp_close_ie" ) ;
+    session.log( L"Have session object" ) ;
+    Installation_Database db( session ) ;
+    session.log( L"Have database object" ) ;
+
+    // Test: ensure that a property is present with its expected value. Exercises the conversion operator to String.
+    session.log( L"VersionMsi = " + Property( session, L"VersionMsi" ) ) ;
+
+    // Test: create a property dynamically from within the CA. Not sure if this can be done offline.
+    Property tv( session, L"TESTVARIABLE" ) ;
+    session.log( L"TESTVARIABLE = " + tv ) ;
+
+    // Test: assign a new value to a property.
+    session.log( L"Setting TESTVARIABLE to 'testvalue'" ) ;
+    tv = L"testvalue" ;
+    session.log( L"TESTVARIABLE = " + tv ) ;
+  }
+}