@Test
public void testOpenRead_fallbackToAsset() throws Exception {

    FileInputStream stream = mock(FileInputStream.class);
    when(mockContext.openFileInput(anyString())).thenThrow(new FileNotFoundException("Test"));
    when(mockAssets.open(anyString())).thenReturn(stream);
    assertSame(stream, FileHelper.openRead(mockContext, "file"));
}