SQLite blob data validation / testing

I am creating tests for an SQLite data base with a blob data type. I would like to validate blob (byte array - picture).

This is what i have and right now I am not checking PICTURES_COLUMN which causes an error (blob cant be parsed to String).

Comparing Set made from ContentValues to a cursor:

  public void testHotelSingleInsert() {
        SQLiteDatabase testDb = testDbHelper.getWritableDatabase();
        long testRowId;

        ContentValues testContentValues = TestUtils.getSingleContentValue(testContext);
        testRowId = testDb.insert(HotelsEntry.TABLE_NAME, null, testContentValues);

        assertTrue("Error: single insert to hotel table failed", testRowId != -1L);

        Set<Map.Entry<String, Object>> testSet = testContentValues.valueSet();
        Cursor cursor = testDb.query(HotelsEntry.TABLE_NAME, null, null, null, null, null, null);
        cursor.moveToFirst();

        for (Map.Entry<String, Object> entry : testSet) {
            String columnName = entry.getKey();
            int columnId = cursor.getColumnIndex(columnName);

            if (entry.getKey().toString() != HotelsEntry.PICTURES_COLUMN) {
                assertEquals(
                        "Value: " + entry.getValue().toString() + " is not equal to: " + cursor.getString(columnId),
                        entry.getValue().toString(),
                        cursor.getString(columnId));
            }
        }
    }

How can I validate that blob in a professional way? Do I have treat blob separetly and get it out of the cursor?