Enhancement : Ec2 - Add describe-vpc-endpoint-services method support. (#3108)

* Enhancement : Ec2 - Add describe-vpc-endpoint-services method support.

* Fix:EC2-describe_vpc_endPoint_services changed the template

* Fixed comments

* Linting

Co-authored-by: usmankb <usman@krazybee.com>
Co-authored-by: Bert Blommers <info@bertblommers.nl>

moto/ec2/models.py

@@ -3074,6 +3074,21 @@ class VPCBackend(object):
 
         return vpc_end_point
 
+    def get_vpc_end_point_services(self):
+        vpc_end_point_services = self.vpc_end_points.values()
+
+        services = []
+        for value in vpc_end_point_services:
+            services.append(value.service_name)
+
+        availability_zones = EC2Backend.describe_availability_zones(self)
+
+        return {
+            "servicesDetails": vpc_end_point_services,
+            "services": services,
+            "availability_zones": availability_zones,
+        }
+
 
 class VPCPeeringConnectionStatus(object):
     def __init__(self, code="initiating-request", message=""):

moto/ec2/responses/vpcs.py

@@ -191,6 +191,11 @@ class VPCs(BaseResponse):
         template = self.response_template(CREATE_VPC_END_POINT)
         return template.render(vpc_end_point=vpc_end_point)
 
+    def describe_vpc_endpoint_services(self):
+        vpc_end_point_services = self.ec2_backend.get_vpc_end_point_services()
+        template = self.response_template(DESCRIBE_VPC_ENDPOINT_RESPONSE)
+        return template.render(vpc_end_points=vpc_end_point_services)
+
 
 CREATE_VPC_RESPONSE = """
 <CreateVpcResponse xmlns="http://ec2.amazonaws.com/doc/{{doc_date}}/">
@@ -449,3 +454,35 @@ CREATE_VPC_END_POINT = """ <CreateVpcEndpointResponse xmlns="http://monitoring.a
         <creationTimestamp>{{ vpc_end_point.created_at }}</creationTimestamp>
     </vpcEndpoint>
 </CreateVpcEndpointResponse>"""
+
+DESCRIBE_VPC_ENDPOINT_RESPONSE = """<DescribeVpcEndpointServicesResponse xmlns="http://ec2.amazonaws.com/doc/2016-11-15/">
+    <requestId>19a9ff46-7df6-49b8-9726-3df27527089d</requestId>
+    <serviceNameSet>
+        {% for serviceName in vpc_end_points.services %}
+            <item>{{ serviceName }}</item>
+        {% endfor %}
+    </serviceNameSet>
+    <serviceDetailSet>
+        <item>
+            {% for service in vpc_end_points.servicesDetails %}
+                <owner>amazon</owner>
+                <serviceType>
+                    <item>
+                        <serviceType>{{ service.type }}</serviceType>
+                    </item>
+                </serviceType>
+                <baseEndpointDnsNameSet>
+                    <item>{{ ".".join((service.service_name.split(".")[::-1])) }}</item>
+                </baseEndpointDnsNameSet>
+                <acceptanceRequired>false</acceptanceRequired>
+                <availabilityZoneSet>
+                    {% for zone in vpc_end_points.availability_zones %}
+                        <item>{{ zone.name }}</item>
+                    {% endfor %}
+                </availabilityZoneSet>
+                <serviceName>{{ service.service_name }}</serviceName>
+                <vpcEndpointPolicySupported>true</vpcEndpointPolicySupported>
+            {% endfor %}
+        </item>
+    </serviceDetailSet>
+</DescribeVpcEndpointServicesResponse>"""

tests/test_ec2/test_vpcs.py

@@ -825,3 +825,34 @@ def test_describe_classic_link_dns_support_multiple():
     assert response.get("Vpcs").sort(key=lambda x: x["VpcId"]) == expected.sort(
         key=lambda x: x["VpcId"]
     )
+
+
+@mock_ec2
+def test_describe_vpc_end_point_services():
+    ec2 = boto3.client("ec2", region_name="us-west-1")
+    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
+
+    route_table = ec2.create_route_table(VpcId=vpc["Vpc"]["VpcId"])
+
+    ec2.create_vpc_endpoint(
+        VpcId=vpc["Vpc"]["VpcId"],
+        ServiceName="com.amazonaws.us-east-1.s3",
+        RouteTableIds=[route_table["RouteTable"]["RouteTableId"]],
+        VpcEndpointType="gateway",
+    )
+
+    vpc_end_point_services = ec2.describe_vpc_endpoint_services()
+
+    assert vpc_end_point_services.get("ServiceDetails").should.be.true
+    assert vpc_end_point_services.get("ServiceNames").should.be.true
+    assert vpc_end_point_services.get("ServiceNames") == ["com.amazonaws.us-east-1.s3"]
+    assert (
+        vpc_end_point_services.get("ServiceDetails")[0]
+        .get("ServiceType", [])[0]
+        .get("ServiceType")
+        == "gateway"
+    )
+    assert vpc_end_point_services.get("ServiceDetails")[0].get("AvailabilityZones") == [
+        "us-west-1a",
+        "us-west-1b",
+    ]