Testing functions that have Android device specific side effects

Take the following function as an example:

public static float convertPixelsToDp(float px, Context context){
    return px / ((float) context.getResources().getDisplayMetrics().densityDpi / DisplayMetrics.DENSITY_DEFAULT);
}

In the function above, px is altered by context.getResources().getDisplayMetrics().densityDpi and DisplayMetrics.DENSITY_DEFAULT. If developers use the same emulator, then a test could be written that works across developer machines. That doesn't seem scalable or correct.

Is there a way to set a mock device or default values for display metrics in order to create tests that work across developer machines?

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