Set a custom context in AndroidTestCase

I'm trying to test my custom ContentProvider which only updates an item at a certain point in time.

In order to test the shouldUpdate branch, I need to revert time and set a custom date in my application. I couldn't stub out System.currentTimeMi开发者_StackOverflowllis(), so I put a method in my Application object, and I'm trying to setContext() in AndroidTestCase like this.

private void setContextDate(final Date myCustomDate){
    final Context baseContext = getContext();
    final ContentResolver contentResolver = baseContext.getContentResolver();
    final MyApplication myApp = new MyApplication() {
        @Override
        public long currentTimeMillis(){
            return myCustomDate.getTime();
            // This normally returns System.currentTimeMillis();
        }
        @Override
        public Context getBaseContext(){
            return baseContext;
        }
        @Override
        public ContentResolver getContentResolver(){
            return contentResolver;
        }
    };
    ContextWrapper contextWrapper = new ContextWrapper(baseContext) {
        @Override
        public Context getApplicationContext(){
            return myApp;
        }

    };
    setContext(contextWrapper);

}

However, when I call getApplicationContext().currentTimeMillis() in my provider, it returns the real implementation of the method, which is System.currentTimeMillis() and not my custom date time that I set in the AndroidTestCase.

What am I doing wrong?

p.s. I know about ProviderTestCase2, but I'm also accessing SharedPreferences in my provider, and for those ProviderTestCase2 returns null. That's why I'm using AndroidTestCase.