moto/tests/test_elb/test_elb.py

from __future__ import unicode_literals
import boto3
import botocore
import boto
import boto.ec2.elb
from boto.ec2.elb import HealthCheck
from boto.ec2.elb.attributes import (
    ConnectionSettingAttribute,
    ConnectionDrainingAttribute,
    AccessLogAttribute,
)
from botocore.exceptions import ClientError
from boto.exception import BotoServerError
from nose.tools import assert_raises
import sure  # noqa

from moto import mock_elb, mock_ec2, mock_elb_deprecated, mock_ec2_deprecated
from moto.iam.models import ACCOUNT_ID


@mock_elb_deprecated
@mock_ec2_deprecated
def test_create_load_balancer():
    conn = boto.connect_elb()
    ec2 = boto.ec2.connect_to_region("us-east-1")

    security_group = ec2.create_security_group("sg-abc987", "description")

    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    conn.create_load_balancer(
        "my-lb", zones, ports, scheme="internal", security_groups=[security_group.id]
    )

    balancers = conn.get_all_load_balancers()
    balancer = balancers[0]
    balancer.name.should.equal("my-lb")
    balancer.scheme.should.equal("internal")
    list(balancer.security_groups).should.equal([security_group.id])
    set(balancer.availability_zones).should.equal(set(["us-east-1a", "us-east-1b"]))
    listener1 = balancer.listeners[0]
    listener1.load_balancer_port.should.equal(80)
    listener1.instance_port.should.equal(8080)
    listener1.protocol.should.equal("HTTP")
    listener2 = balancer.listeners[1]
    listener2.load_balancer_port.should.equal(443)
    listener2.instance_port.should.equal(8443)
    listener2.protocol.should.equal("TCP")


@mock_elb_deprecated
def test_getting_missing_elb():
    conn = boto.connect_elb()
    conn.get_all_load_balancers.when.called_with(
        load_balancer_names="aaa"
    ).should.throw(BotoServerError)


@mock_elb_deprecated
def test_create_elb_in_multiple_region():
    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]

    west1_conn = boto.ec2.elb.connect_to_region("us-west-1")
    west1_conn.create_load_balancer("my-lb", zones, ports)

    west2_conn = boto.ec2.elb.connect_to_region("us-west-2")
    west2_conn.create_load_balancer("my-lb", zones, ports)

    list(west1_conn.get_all_load_balancers()).should.have.length_of(1)
    list(west2_conn.get_all_load_balancers()).should.have.length_of(1)


@mock_elb_deprecated
def test_create_load_balancer_with_certificate():
    conn = boto.connect_elb()

    zones = ["us-east-1a"]
    ports = [
        (443, 8443, "https", "arn:aws:iam:{}:server-certificate/test-cert".format(ACCOUNT_ID))
    ]
    conn.create_load_balancer("my-lb", zones, ports)

    balancers = conn.get_all_load_balancers()
    balancer = balancers[0]
    balancer.name.should.equal("my-lb")
    balancer.scheme.should.equal("internet-facing")
    set(balancer.availability_zones).should.equal(set(["us-east-1a"]))
    listener = balancer.listeners[0]
    listener.load_balancer_port.should.equal(443)
    listener.instance_port.should.equal(8443)
    listener.protocol.should.equal("HTTPS")
    listener.ssl_certificate_id.should.equal(
        "arn:aws:iam:{}:server-certificate/test-cert".format(ACCOUNT_ID)
    )


@mock_elb
def test_create_and_delete_boto3_support():
    client = boto3.client("elb", region_name="us-east-1")

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )
    list(
        client.describe_load_balancers()["LoadBalancerDescriptions"]
    ).should.have.length_of(1)

    client.delete_load_balancer(LoadBalancerName="my-lb")
    list(
        client.describe_load_balancers()["LoadBalancerDescriptions"]
    ).should.have.length_of(0)


@mock_elb
def test_create_load_balancer_with_no_listeners_defined():
    client = boto3.client("elb", region_name="us-east-1")

    with assert_raises(ClientError):
        client.create_load_balancer(
            LoadBalancerName="my-lb",
            Listeners=[],
            AvailabilityZones=["us-east-1a", "us-east-1b"],
        )


@mock_elb
def test_describe_paginated_balancers():
    client = boto3.client("elb", region_name="us-east-1")

    for i in range(51):
        client.create_load_balancer(
            LoadBalancerName="my-lb%d" % i,
            Listeners=[
                {"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}
            ],
            AvailabilityZones=["us-east-1a", "us-east-1b"],
        )

    resp = client.describe_load_balancers()
    resp["LoadBalancerDescriptions"].should.have.length_of(50)
    resp["NextMarker"].should.equal(
        resp["LoadBalancerDescriptions"][-1]["LoadBalancerName"]
    )
    resp2 = client.describe_load_balancers(Marker=resp["NextMarker"])
    resp2["LoadBalancerDescriptions"].should.have.length_of(1)
    assert "NextToken" not in resp2.keys()


@mock_elb
@mock_ec2
def test_apply_security_groups_to_load_balancer():
    client = boto3.client("elb", region_name="us-east-1")
    ec2 = boto3.resource("ec2", region_name="us-east-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    security_group = ec2.create_security_group(
        GroupName="sg01", Description="Test security group sg01", VpcId=vpc.id
    )

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )

    response = client.apply_security_groups_to_load_balancer(
        LoadBalancerName="my-lb", SecurityGroups=[security_group.id]
    )

    assert response["SecurityGroups"] == [security_group.id]
    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    assert balancer["SecurityGroups"] == [security_group.id]

    # Using a not-real security group raises an error
    with assert_raises(ClientError) as error:
        response = client.apply_security_groups_to_load_balancer(
            LoadBalancerName="my-lb", SecurityGroups=["not-really-a-security-group"]
        )
    assert "One or more of the specified security groups do not exist." in str(
        error.exception
    )


@mock_elb_deprecated
def test_add_listener():
    conn = boto.connect_elb()
    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http")]
    conn.create_load_balancer("my-lb", zones, ports)
    new_listener = (443, 8443, "tcp")
    conn.create_load_balancer_listeners("my-lb", [new_listener])
    balancers = conn.get_all_load_balancers()
    balancer = balancers[0]
    listener1 = balancer.listeners[0]
    listener1.load_balancer_port.should.equal(80)
    listener1.instance_port.should.equal(8080)
    listener1.protocol.should.equal("HTTP")
    listener2 = balancer.listeners[1]
    listener2.load_balancer_port.should.equal(443)
    listener2.instance_port.should.equal(8443)
    listener2.protocol.should.equal("TCP")


@mock_elb_deprecated
def test_delete_listener():
    conn = boto.connect_elb()

    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    conn.create_load_balancer("my-lb", zones, ports)
    conn.delete_load_balancer_listeners("my-lb", [443])
    balancers = conn.get_all_load_balancers()
    balancer = balancers[0]
    listener1 = balancer.listeners[0]
    listener1.load_balancer_port.should.equal(80)
    listener1.instance_port.should.equal(8080)
    listener1.protocol.should.equal("HTTP")
    balancer.listeners.should.have.length_of(1)


@mock_elb
def test_create_and_delete_listener_boto3_support():
    client = boto3.client("elb", region_name="us-east-1")

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "http", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )
    list(
        client.describe_load_balancers()["LoadBalancerDescriptions"]
    ).should.have.length_of(1)

    client.create_load_balancer_listeners(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 443, "InstancePort": 8443}],
    )
    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    list(balancer["ListenerDescriptions"]).should.have.length_of(2)
    balancer["ListenerDescriptions"][0]["Listener"]["Protocol"].should.equal("HTTP")
    balancer["ListenerDescriptions"][0]["Listener"]["LoadBalancerPort"].should.equal(80)
    balancer["ListenerDescriptions"][0]["Listener"]["InstancePort"].should.equal(8080)
    balancer["ListenerDescriptions"][1]["Listener"]["Protocol"].should.equal("TCP")
    balancer["ListenerDescriptions"][1]["Listener"]["LoadBalancerPort"].should.equal(
        443
    )
    balancer["ListenerDescriptions"][1]["Listener"]["InstancePort"].should.equal(8443)

    # Creating this listener with an conflicting definition throws error
    with assert_raises(ClientError):
        client.create_load_balancer_listeners(
            LoadBalancerName="my-lb",
            Listeners=[
                {"Protocol": "tcp", "LoadBalancerPort": 443, "InstancePort": 1234}
            ],
        )

    client.delete_load_balancer_listeners(
        LoadBalancerName="my-lb", LoadBalancerPorts=[443]
    )

    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    list(balancer["ListenerDescriptions"]).should.have.length_of(1)


@mock_elb_deprecated
def test_set_sslcertificate():
    conn = boto.connect_elb()

    zones = ["us-east-1a", "us-east-1b"]
    ports = [(443, 8443, "tcp")]
    conn.create_load_balancer("my-lb", zones, ports)
    conn.set_lb_listener_SSL_certificate("my-lb", "443", "arn:certificate")
    balancers = conn.get_all_load_balancers()
    balancer = balancers[0]
    listener1 = balancer.listeners[0]
    listener1.load_balancer_port.should.equal(443)
    listener1.instance_port.should.equal(8443)
    listener1.protocol.should.equal("TCP")
    listener1.ssl_certificate_id.should.equal("arn:certificate")


@mock_elb_deprecated
def test_get_load_balancers_by_name():
    conn = boto.connect_elb()

    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    conn.create_load_balancer("my-lb1", zones, ports)
    conn.create_load_balancer("my-lb2", zones, ports)
    conn.create_load_balancer("my-lb3", zones, ports)

    conn.get_all_load_balancers().should.have.length_of(3)
    conn.get_all_load_balancers(load_balancer_names=["my-lb1"]).should.have.length_of(1)
    conn.get_all_load_balancers(
        load_balancer_names=["my-lb1", "my-lb2"]
    ).should.have.length_of(2)


@mock_elb_deprecated
def test_delete_load_balancer():
    conn = boto.connect_elb()

    zones = ["us-east-1a"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    conn.create_load_balancer("my-lb", zones, ports)

    balancers = conn.get_all_load_balancers()
    balancers.should.have.length_of(1)

    conn.delete_load_balancer("my-lb")
    balancers = conn.get_all_load_balancers()
    balancers.should.have.length_of(0)


@mock_elb_deprecated
def test_create_health_check():
    conn = boto.connect_elb()

    hc = HealthCheck(
        interval=20,
        healthy_threshold=3,
        unhealthy_threshold=5,
        target="HTTP:8080/health",
        timeout=23,
    )

    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    lb.configure_health_check(hc)

    balancer = conn.get_all_load_balancers()[0]
    health_check = balancer.health_check
    health_check.interval.should.equal(20)
    health_check.healthy_threshold.should.equal(3)
    health_check.unhealthy_threshold.should.equal(5)
    health_check.target.should.equal("HTTP:8080/health")
    health_check.timeout.should.equal(23)


@mock_elb
def test_create_health_check_boto3():
    client = boto3.client("elb", region_name="us-east-1")

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "http", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )
    client.configure_health_check(
        LoadBalancerName="my-lb",
        HealthCheck={
            "Target": "HTTP:8080/health",
            "Interval": 20,
            "Timeout": 23,
            "HealthyThreshold": 3,
            "UnhealthyThreshold": 5,
        },
    )

    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    balancer["HealthCheck"]["Target"].should.equal("HTTP:8080/health")
    balancer["HealthCheck"]["Interval"].should.equal(20)
    balancer["HealthCheck"]["Timeout"].should.equal(23)
    balancer["HealthCheck"]["HealthyThreshold"].should.equal(3)
    balancer["HealthCheck"]["UnhealthyThreshold"].should.equal(5)


@mock_ec2_deprecated
@mock_elb_deprecated
def test_register_instances():
    ec2_conn = boto.connect_ec2()
    reservation = ec2_conn.run_instances("ami-1234abcd", 2)
    instance_id1 = reservation.instances[0].id
    instance_id2 = reservation.instances[1].id

    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    lb.register_instances([instance_id1, instance_id2])

    balancer = conn.get_all_load_balancers()[0]
    instance_ids = [instance.id for instance in balancer.instances]
    set(instance_ids).should.equal(set([instance_id1, instance_id2]))


@mock_ec2
@mock_elb
def test_register_instances_boto3():
    ec2 = boto3.resource("ec2", region_name="us-east-1")
    response = ec2.create_instances(ImageId="ami-1234abcd", MinCount=2, MaxCount=2)
    instance_id1 = response[0].id
    instance_id2 = response[1].id

    client = boto3.client("elb", region_name="us-east-1")
    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "http", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )
    client.register_instances_with_load_balancer(
        LoadBalancerName="my-lb",
        Instances=[{"InstanceId": instance_id1}, {"InstanceId": instance_id2}],
    )
    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    instance_ids = [instance["InstanceId"] for instance in balancer["Instances"]]
    set(instance_ids).should.equal(set([instance_id1, instance_id2]))


@mock_ec2_deprecated
@mock_elb_deprecated
def test_deregister_instances():
    ec2_conn = boto.connect_ec2()
    reservation = ec2_conn.run_instances("ami-1234abcd", 2)
    instance_id1 = reservation.instances[0].id
    instance_id2 = reservation.instances[1].id

    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    lb.register_instances([instance_id1, instance_id2])

    balancer = conn.get_all_load_balancers()[0]
    balancer.instances.should.have.length_of(2)
    balancer.deregister_instances([instance_id1])

    balancer.instances.should.have.length_of(1)
    balancer.instances[0].id.should.equal(instance_id2)


@mock_ec2
@mock_elb
def test_deregister_instances_boto3():
    ec2 = boto3.resource("ec2", region_name="us-east-1")
    response = ec2.create_instances(ImageId="ami-1234abcd", MinCount=2, MaxCount=2)
    instance_id1 = response[0].id
    instance_id2 = response[1].id

    client = boto3.client("elb", region_name="us-east-1")
    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "http", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )
    client.register_instances_with_load_balancer(
        LoadBalancerName="my-lb",
        Instances=[{"InstanceId": instance_id1}, {"InstanceId": instance_id2}],
    )

    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    balancer["Instances"].should.have.length_of(2)

    client.deregister_instances_from_load_balancer(
        LoadBalancerName="my-lb", Instances=[{"InstanceId": instance_id1}]
    )

    balancer = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    balancer["Instances"].should.have.length_of(1)
    balancer["Instances"][0]["InstanceId"].should.equal(instance_id2)


@mock_elb_deprecated
def test_default_attributes():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    attributes = lb.get_attributes()

    attributes.cross_zone_load_balancing.enabled.should.be.false
    attributes.connection_draining.enabled.should.be.false
    attributes.access_log.enabled.should.be.false
    attributes.connecting_settings.idle_timeout.should.equal(60)


@mock_elb_deprecated
def test_cross_zone_load_balancing_attribute():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    conn.modify_lb_attribute("my-lb", "CrossZoneLoadBalancing", True)
    attributes = lb.get_attributes(force=True)
    attributes.cross_zone_load_balancing.enabled.should.be.true

    conn.modify_lb_attribute("my-lb", "CrossZoneLoadBalancing", False)
    attributes = lb.get_attributes(force=True)
    attributes.cross_zone_load_balancing.enabled.should.be.false


@mock_elb_deprecated
def test_connection_draining_attribute():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    connection_draining = ConnectionDrainingAttribute()
    connection_draining.enabled = True
    connection_draining.timeout = 60

    conn.modify_lb_attribute("my-lb", "ConnectionDraining", connection_draining)
    attributes = lb.get_attributes(force=True)
    attributes.connection_draining.enabled.should.be.true
    attributes.connection_draining.timeout.should.equal(60)

    connection_draining.timeout = 30
    conn.modify_lb_attribute("my-lb", "ConnectionDraining", connection_draining)
    attributes = lb.get_attributes(force=True)
    attributes.connection_draining.timeout.should.equal(30)

    connection_draining.enabled = False
    conn.modify_lb_attribute("my-lb", "ConnectionDraining", connection_draining)
    attributes = lb.get_attributes(force=True)
    attributes.connection_draining.enabled.should.be.false


@mock_elb_deprecated
def test_access_log_attribute():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    access_log = AccessLogAttribute()
    access_log.enabled = True
    access_log.s3_bucket_name = "bucket"
    access_log.s3_bucket_prefix = "prefix"
    access_log.emit_interval = 60

    conn.modify_lb_attribute("my-lb", "AccessLog", access_log)
    attributes = lb.get_attributes(force=True)
    attributes.access_log.enabled.should.be.true
    attributes.access_log.s3_bucket_name.should.equal("bucket")
    attributes.access_log.s3_bucket_prefix.should.equal("prefix")
    attributes.access_log.emit_interval.should.equal(60)

    access_log.enabled = False
    conn.modify_lb_attribute("my-lb", "AccessLog", access_log)
    attributes = lb.get_attributes(force=True)
    attributes.access_log.enabled.should.be.false


@mock_elb_deprecated
def test_connection_settings_attribute():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)

    connection_settings = ConnectionSettingAttribute(conn)
    connection_settings.idle_timeout = 120

    conn.modify_lb_attribute("my-lb", "ConnectingSettings", connection_settings)
    attributes = lb.get_attributes(force=True)
    attributes.connecting_settings.idle_timeout.should.equal(120)

    connection_settings.idle_timeout = 60
    conn.modify_lb_attribute("my-lb", "ConnectingSettings", connection_settings)
    attributes = lb.get_attributes(force=True)
    attributes.connecting_settings.idle_timeout.should.equal(60)


@mock_elb_deprecated
def test_create_lb_cookie_stickiness_policy():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    cookie_expiration_period = 60
    policy_name = "LBCookieStickinessPolicy"

    lb.create_cookie_stickiness_policy(cookie_expiration_period, policy_name)

    lb = conn.get_all_load_balancers()[0]
    # There appears to be a quirk about boto, whereby it returns a unicode
    # string for cookie_expiration_period, despite being stated in
    # documentation to be a long numeric.
    #
    # To work around that, this value is converted to an int and checked.
    cookie_expiration_period_response_str = lb.policies.lb_cookie_stickiness_policies[
        0
    ].cookie_expiration_period
    int(cookie_expiration_period_response_str).should.equal(cookie_expiration_period)
    lb.policies.lb_cookie_stickiness_policies[0].policy_name.should.equal(policy_name)


@mock_elb_deprecated
def test_create_lb_cookie_stickiness_policy_no_expiry():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    policy_name = "LBCookieStickinessPolicy"

    lb.create_cookie_stickiness_policy(None, policy_name)

    lb = conn.get_all_load_balancers()[0]
    lb.policies.lb_cookie_stickiness_policies[0].cookie_expiration_period.should.be.none
    lb.policies.lb_cookie_stickiness_policies[0].policy_name.should.equal(policy_name)


@mock_elb_deprecated
def test_create_app_cookie_stickiness_policy():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    cookie_name = "my-stickiness-policy"
    policy_name = "AppCookieStickinessPolicy"

    lb.create_app_cookie_stickiness_policy(cookie_name, policy_name)

    lb = conn.get_all_load_balancers()[0]
    lb.policies.app_cookie_stickiness_policies[0].cookie_name.should.equal(cookie_name)
    lb.policies.app_cookie_stickiness_policies[0].policy_name.should.equal(policy_name)


@mock_elb_deprecated
def test_create_lb_policy():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    policy_name = "ProxyPolicy"

    lb.create_lb_policy(policy_name, "ProxyProtocolPolicyType", {"ProxyProtocol": True})

    lb = conn.get_all_load_balancers()[0]
    lb.policies.other_policies[0].policy_name.should.equal(policy_name)


@mock_elb_deprecated
def test_set_policies_of_listener():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    listener_port = 80
    policy_name = "my-stickiness-policy"

    # boto docs currently state that zero or one policy may be associated
    # with a given listener

    # in a real flow, it is necessary first to create a policy,
    # then to set that policy to the listener
    lb.create_cookie_stickiness_policy(None, policy_name)
    lb.set_policies_of_listener(listener_port, [policy_name])

    lb = conn.get_all_load_balancers()[0]
    listener = lb.listeners[0]
    listener.load_balancer_port.should.equal(listener_port)
    # by contrast to a backend, a listener stores only policy name strings
    listener.policy_names[0].should.equal(policy_name)


@mock_elb_deprecated
def test_set_policies_of_backend_server():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", [], ports)
    instance_port = 8080
    policy_name = "ProxyPolicy"

    # in a real flow, it is necessary first to create a policy,
    # then to set that policy to the backend
    lb.create_lb_policy(policy_name, "ProxyProtocolPolicyType", {"ProxyProtocol": True})
    lb.set_policies_of_backend_server(instance_port, [policy_name])

    lb = conn.get_all_load_balancers()[0]
    backend = lb.backends[0]
    backend.instance_port.should.equal(instance_port)
    # by contrast to a listener, a backend stores OtherPolicy objects
    backend.policies[0].policy_name.should.equal(policy_name)


@mock_ec2_deprecated
@mock_elb_deprecated
def test_describe_instance_health():
    ec2_conn = boto.connect_ec2()
    reservation = ec2_conn.run_instances("ami-1234abcd", 2)
    instance_id1 = reservation.instances[0].id
    instance_id2 = reservation.instances[1].id

    conn = boto.connect_elb()
    zones = ["us-east-1a", "us-east-1b"]
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    lb = conn.create_load_balancer("my-lb", zones, ports)

    instances_health = conn.describe_instance_health("my-lb")
    instances_health.should.be.empty

    lb.register_instances([instance_id1, instance_id2])

    instances_health = conn.describe_instance_health("my-lb")
    instances_health.should.have.length_of(2)
    for instance_health in instances_health:
        instance_health.instance_id.should.be.within([instance_id1, instance_id2])
        instance_health.state.should.equal("InService")

    instances_health = conn.describe_instance_health("my-lb", [instance_id1])
    instances_health.should.have.length_of(1)
    instances_health[0].instance_id.should.equal(instance_id1)
    instances_health[0].state.should.equal("InService")


@mock_ec2
@mock_elb
def test_describe_instance_health_boto3():
    elb = boto3.client("elb", region_name="us-east-1")
    ec2 = boto3.client("ec2", region_name="us-east-1")
    instances = ec2.run_instances(MinCount=2, MaxCount=2)["Instances"]
    lb_name = "my_load_balancer"
    elb.create_load_balancer(
        Listeners=[{"InstancePort": 80, "LoadBalancerPort": 8080, "Protocol": "HTTP"}],
        LoadBalancerName=lb_name,
    )
    elb.register_instances_with_load_balancer(
        LoadBalancerName=lb_name, Instances=[{"InstanceId": instances[0]["InstanceId"]}]
    )
    instances_health = elb.describe_instance_health(
        LoadBalancerName=lb_name,
        Instances=[{"InstanceId": instance["InstanceId"]} for instance in instances],
    )
    instances_health["InstanceStates"].should.have.length_of(2)
    instances_health["InstanceStates"][0]["InstanceId"].should.equal(
        instances[0]["InstanceId"]
    )
    instances_health["InstanceStates"][0]["State"].should.equal("InService")
    instances_health["InstanceStates"][1]["InstanceId"].should.equal(
        instances[1]["InstanceId"]
    )
    instances_health["InstanceStates"][1]["State"].should.equal("Unknown")


@mock_elb
def test_add_remove_tags():
    client = boto3.client("elb", region_name="us-east-1")

    client.add_tags.when.called_with(
        LoadBalancerNames=["my-lb"], Tags=[{"Key": "a", "Value": "b"}]
    ).should.throw(botocore.exceptions.ClientError)

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )

    list(
        client.describe_load_balancers()["LoadBalancerDescriptions"]
    ).should.have.length_of(1)

    client.add_tags(LoadBalancerNames=["my-lb"], Tags=[{"Key": "a", "Value": "b"}])

    tags = dict(
        [
            (d["Key"], d["Value"])
            for d in client.describe_tags(LoadBalancerNames=["my-lb"])[
                "TagDescriptions"
            ][0]["Tags"]
        ]
    )
    tags.should.have.key("a").which.should.equal("b")

    client.add_tags(
        LoadBalancerNames=["my-lb"],
        Tags=[
            {"Key": "a", "Value": "b"},
            {"Key": "b", "Value": "b"},
            {"Key": "c", "Value": "b"},
            {"Key": "d", "Value": "b"},
            {"Key": "e", "Value": "b"},
            {"Key": "f", "Value": "b"},
            {"Key": "g", "Value": "b"},
            {"Key": "h", "Value": "b"},
            {"Key": "i", "Value": "b"},
            {"Key": "j", "Value": "b"},
        ],
    )

    client.add_tags.when.called_with(
        LoadBalancerNames=["my-lb"], Tags=[{"Key": "k", "Value": "b"}]
    ).should.throw(botocore.exceptions.ClientError)

    client.add_tags(LoadBalancerNames=["my-lb"], Tags=[{"Key": "j", "Value": "c"}])

    tags = dict(
        [
            (d["Key"], d["Value"])
            for d in client.describe_tags(LoadBalancerNames=["my-lb"])[
                "TagDescriptions"
            ][0]["Tags"]
        ]
    )

    tags.should.have.key("a").which.should.equal("b")
    tags.should.have.key("b").which.should.equal("b")
    tags.should.have.key("c").which.should.equal("b")
    tags.should.have.key("d").which.should.equal("b")
    tags.should.have.key("e").which.should.equal("b")
    tags.should.have.key("f").which.should.equal("b")
    tags.should.have.key("g").which.should.equal("b")
    tags.should.have.key("h").which.should.equal("b")
    tags.should.have.key("i").which.should.equal("b")
    tags.should.have.key("j").which.should.equal("c")
    tags.shouldnt.have.key("k")

    client.remove_tags(LoadBalancerNames=["my-lb"], Tags=[{"Key": "a"}])

    tags = dict(
        [
            (d["Key"], d["Value"])
            for d in client.describe_tags(LoadBalancerNames=["my-lb"])[
                "TagDescriptions"
            ][0]["Tags"]
        ]
    )

    tags.shouldnt.have.key("a")
    tags.should.have.key("b").which.should.equal("b")
    tags.should.have.key("c").which.should.equal("b")
    tags.should.have.key("d").which.should.equal("b")
    tags.should.have.key("e").which.should.equal("b")
    tags.should.have.key("f").which.should.equal("b")
    tags.should.have.key("g").which.should.equal("b")
    tags.should.have.key("h").which.should.equal("b")
    tags.should.have.key("i").which.should.equal("b")
    tags.should.have.key("j").which.should.equal("c")

    client.create_load_balancer(
        LoadBalancerName="other-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 433, "InstancePort": 8433}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )

    client.add_tags(
        LoadBalancerNames=["other-lb"], Tags=[{"Key": "other", "Value": "something"}]
    )

    lb_tags = dict(
        [
            (l["LoadBalancerName"], dict([(d["Key"], d["Value"]) for d in l["Tags"]]))
            for l in client.describe_tags(LoadBalancerNames=["my-lb", "other-lb"])[
                "TagDescriptions"
            ]
        ]
    )

    lb_tags.should.have.key("my-lb")
    lb_tags.should.have.key("other-lb")

    lb_tags["my-lb"].shouldnt.have.key("other")
    lb_tags["other-lb"].should.have.key("other").which.should.equal("something")


@mock_elb
def test_create_with_tags():
    client = boto3.client("elb", region_name="us-east-1")

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
        Tags=[{"Key": "k", "Value": "v"}],
    )

    tags = dict(
        (d["Key"], d["Value"])
        for d in client.describe_tags(LoadBalancerNames=["my-lb"])["TagDescriptions"][
            0
        ]["Tags"]
    )
    tags.should.have.key("k").which.should.equal("v")


@mock_elb
def test_modify_attributes():
    client = boto3.client("elb", region_name="us-east-1")

    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        AvailabilityZones=["us-east-1a", "us-east-1b"],
    )

    # Default ConnectionDraining timeout of 300 seconds
    client.modify_load_balancer_attributes(
        LoadBalancerName="my-lb",
        LoadBalancerAttributes={"ConnectionDraining": {"Enabled": True}},
    )
    lb_attrs = client.describe_load_balancer_attributes(LoadBalancerName="my-lb")
    lb_attrs["LoadBalancerAttributes"]["ConnectionDraining"]["Enabled"].should.equal(
        True
    )
    lb_attrs["LoadBalancerAttributes"]["ConnectionDraining"]["Timeout"].should.equal(
        300
    )

    # specify a custom ConnectionDraining timeout
    client.modify_load_balancer_attributes(
        LoadBalancerName="my-lb",
        LoadBalancerAttributes={"ConnectionDraining": {"Enabled": True, "Timeout": 45}},
    )
    lb_attrs = client.describe_load_balancer_attributes(LoadBalancerName="my-lb")
    lb_attrs["LoadBalancerAttributes"]["ConnectionDraining"]["Enabled"].should.equal(
        True
    )
    lb_attrs["LoadBalancerAttributes"]["ConnectionDraining"]["Timeout"].should.equal(45)


@mock_ec2
@mock_elb
def test_subnets():
    ec2 = boto3.resource("ec2", region_name="us-east-1")
    vpc = ec2.create_vpc(CidrBlock="172.28.7.0/24", InstanceTenancy="default")
    subnet = ec2.create_subnet(VpcId=vpc.id, CidrBlock="172.28.7.192/26")
    client = boto3.client("elb", region_name="us-east-1")
    client.create_load_balancer(
        LoadBalancerName="my-lb",
        Listeners=[{"Protocol": "tcp", "LoadBalancerPort": 80, "InstancePort": 8080}],
        Subnets=[subnet.id],
    )

    lb = client.describe_load_balancers()["LoadBalancerDescriptions"][0]
    lb.should.have.key("Subnets").which.should.have.length_of(1)
    lb["Subnets"][0].should.equal(subnet.id)

    lb.should.have.key("VPCId").which.should.equal(vpc.id)


@mock_elb_deprecated
def test_create_load_balancer_duplicate():
    conn = boto.connect_elb()
    ports = [(80, 8080, "http"), (443, 8443, "tcp")]
    conn.create_load_balancer("my-lb", [], ports)
    conn.create_load_balancer.when.called_with("my-lb", [], ports).should.throw(
        BotoServerError
    )