Mocking Boto with Moto

mockery.py

import boto
from moto import mock_s3
from model import MyModel


@mock_s3
def test_save_study():
    conn = boto.connect_s3()
    conn.create_bucket('mybucket')

    m = MyModel('x/z.json', 'y')
    m.save()

    assert conn.get_bucket('mybucket').get_key(
        'x/z.json').get_contents_as_string() == 'y'

model.py

import boto
from boto.s3.key import Key


class MyModel(object):

    def __init__(self, name, value):
        self.name = name
        self.value = value

    def save(self):
        conn = boto.connect_s3()
        bucket = conn.get_bucket('mybucket')
        k = Key(bucket)
        k.key = self.name
        k.set_contents_from_string(self.value)