Add the sqlite_current_time variable for testing purposes. (CVS 1156)

FossilOrigin-Name: 23fa407d50741bc0719259792398f28c1d0f12c2

src/os.c

@@ -1616,6 +1616,14 @@ char *sqliteOsFullPathname(const char *zRelative){
 #endif
 }
 
+/*
+** The following variable, if set to a now-zero value, become the result
+** returned from sqliteOsCurrentTime().  This is used for testing.
+*/
+#ifdef SQLITE_TEST
+int sqlite_current_time = 0;
+#endif
+
 /*
 ** Find the current time (in Universal Coordinated Time).  Write the
 ** current time and date as a Julian Day number into *prNow and
@@ -1626,7 +1634,6 @@ int sqliteOsCurrentTime(double *prNow){
   time_t t;
   time(&t);
   *prNow = t/86400.0 + 2440587.5;
-  return 0;
 #endif
 #if OS_WIN
   FILETIME ft;
@@ -1637,8 +1644,11 @@ int sqliteOsCurrentTime(double *prNow){
   GetSystemTimeAsFileTime( &ft );
   now = ((double)ft.dwHighDateTime) * 4294967296.0; 
   *prNow = (now + ft.dwLowDateTime)/864000000000.0 + 2305813.5;
+#endif
+#ifdef SQLITE_TEST
+  if( sqlite_current_time ){
+    *prNow = sqlite_current_time/86400.0 + 2440587.5;
+  }
 #endif
   return 0;
-
-  return 1;
 }