def stub_out_db_instance_api(stubs):
    'Stubs out the db API for creating Instances.'
    INSTANCE_TYPES = {'m1.tiny': dict(memory_mb=512, vcpus=1, root_gb=0, flavorid=1), 'm1.small': dict(memory_mb=2048, vcpus=1, root_gb=20, flavorid=2), 'm1.medium': dict(memory_mb=4096, vcpus=2, root_gb=40, flavorid=3), 'm1.large': dict(memory_mb=8192, vcpus=4, root_gb=80, flavorid=4), 'm1.xlarge': dict(memory_mb=16384, vcpus=8, root_gb=160, flavorid=5)}

    class FakeModel(object):
        'Stubs out for model.'

        def __init__(self, values):
            self.values = values

        def __getattr__(self, name):
            return self.values[name]

        def __getitem__(self, key):
            if (key in self.values):
                return self.values[key]
            else:
                raise NotImplementedError()

    def fake_instance_create(context, values):
        'Stubs out the db.instance_create method.'
        type_data = INSTANCE_TYPES[values['instance_type']]
        base_options = {'name': values['name'], 'id': values['id'], 'uuid': utils.gen_uuid(), 'reservation_id': utils.generate_uid('r'), 'image_ref': values['image_ref'], 'kernel_id': values['kernel_id'], 'ramdisk_id': values['ramdisk_id'], 'vm_state': vm_states.BUILDING, 'task_state': task_states.SCHEDULING, 'user_id': values['user_id'], 'project_id': values['project_id'], 'launch_time': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()), 'instance_type': values['instance_type'], 'memory_mb': type_data['memory_mb'], 'vcpus': type_data['vcpus'], 'mac_addresses': [{'address': values['mac_address']}], 'root_gb': type_data['root_gb']}
        return FakeModel(base_options)

    def fake_network_get_by_instance(context, instance_id):
        'Stubs out the db.network_get_by_instance method.'
        fields = {'bridge': 'vmnet0', 'netmask': '255.255.255.0', 'gateway': '10.10.10.1', 'broadcast': '10.10.10.255', 'dns1': 'fake', 'vlan': 100}
        return FakeModel(fields)

    def fake_instance_type_get_all(context, inactive=0, filters=None):
        return INSTANCE_TYPES.values()

    def fake_instance_type_get_by_name(context, name):
        return INSTANCE_TYPES[name]
    stubs.Set(db, 'instance_create', fake_instance_create)
    stubs.Set(db, 'network_get_by_instance', fake_network_get_by_instance)
    stubs.Set(db, 'instance_type_get_all', fake_instance_type_get_all)
    stubs.Set(db, 'instance_type_get_by_name', fake_instance_type_get_by_name)
Stubs out the db API for creating Instances.
def stub_out_db_instance_api(stubs):
    
    INSTANCE_TYPES = {'m1.tiny': dict(memory_mb=512, vcpus=1, root_gb=0, flavorid=1), 'm1.small': dict(memory_mb=2048, vcpus=1, root_gb=20, flavorid=2), 'm1.medium': dict(memory_mb=4096, vcpus=2, root_gb=40, flavorid=3), 'm1.large': dict(memory_mb=8192, vcpus=4, root_gb=80, flavorid=4), 'm1.xlarge': dict(memory_mb=16384, vcpus=8, root_gb=160, flavorid=5)}

    class FakeModel(object):
        'Stubs out for model.'

        def __init__(self, values):
            self.values = values

        def __getattr__(self, name):
            return self.values[name]

        def __getitem__(self, key):
            if (key in self.values):
                return self.values[key]
            else:
                raise NotImplementedError()

    def fake_instance_create(context, values):
        'Stubs out the db.instance_create method.'
        type_data = INSTANCE_TYPES[values['instance_type']]
        base_options = {'name': values['name'], 'id': values['id'], 'uuid': utils.gen_uuid(), 'reservation_id': utils.generate_uid('r'), 'image_ref': values['image_ref'], 'kernel_id': values['kernel_id'], 'ramdisk_id': values['ramdisk_id'], 'vm_state': vm_states.BUILDING, 'task_state': task_states.SCHEDULING, 'user_id': values['user_id'], 'project_id': values['project_id'], 'launch_time': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()), 'instance_type': values['instance_type'], 'memory_mb': type_data['memory_mb'], 'vcpus': type_data['vcpus'], 'mac_addresses': [{'address': values['mac_address']}], 'root_gb': type_data['root_gb']}
        return FakeModel(base_options)

    def fake_network_get_by_instance(context, instance_id):
        'Stubs out the db.network_get_by_instance method.'
        fields = {'bridge': 'vmnet0', 'netmask': '255.255.255.0', 'gateway': '10.10.10.1', 'broadcast': '10.10.10.255', 'dns1': 'fake', 'vlan': 100}
        return FakeModel(fields)

    def fake_instance_type_get_all(context, inactive=0, filters=None):
        return INSTANCE_TYPES.values()

    def fake_instance_type_get_by_name(context, name):
        return INSTANCE_TYPES[name]
    stubs.Set(db, 'instance_create', fake_instance_create)
    stubs.Set(db, 'network_get_by_instance', fake_network_get_by_instance)
    stubs.Set(db, 'instance_type_get_all', fake_instance_type_get_all)
    stubs.Set(db, 'instance_type_get_by_name', fake_instance_type_get_by_name)