EMR: Rename get_cluster to describe_cluster (#4504)

.gitignore

@@ -25,3 +25,4 @@ tests/file.tmp
 .venv/
 htmlcov/
 .~c9_*
+.coverage*

IMPLEMENTATION_COVERAGE.md

@@ -1858,7 +1858,7 @@
 
 ## emr
 <details>
-<summary>40% implemented</summary>
+<summary>42% implemented</summary>
 
 - [ ] add_instance_fleet
 - [X] add_instance_groups
@@ -1871,7 +1871,7 @@
 - [X] delete_security_configuration
 - [ ] delete_studio
 - [ ] delete_studio_session_mapping
-- [ ] describe_cluster
+- [X] describe_cluster
 - [X] describe_job_flows
 - [ ] describe_notebook_execution
 - [ ] describe_release_label

moto/emr/models.py

@@ -414,7 +414,7 @@ class ElasticMapReduceBackend(BaseBackend):
         return ec2_backends[self.region_name]
 
     def add_applications(self, cluster_id, applications):
-        cluster = self.get_cluster(cluster_id)
+        cluster = self.describe_cluster(cluster_id)
         cluster.add_applications(applications)
 
     def add_instance_groups(self, cluster_id, instance_groups):
@@ -444,7 +444,7 @@ class ElasticMapReduceBackend(BaseBackend):
         return steps
 
     def add_tags(self, cluster_id, tags):
-        cluster = self.get_cluster(cluster_id)
+        cluster = self.describe_cluster(cluster_id)
         cluster.add_tags(tags)
 
     def describe_job_flows(
@@ -479,7 +479,7 @@ class ElasticMapReduceBackend(BaseBackend):
             if step.id == step_id:
                 return step
 
-    def get_cluster(self, cluster_id):
+    def describe_cluster(self, cluster_id):
         if cluster_id in self.clusters:
             return self.clusters[cluster_id]
         raise EmrError("ResourceNotFoundException", "", "error_json")
@@ -578,7 +578,7 @@ class ElasticMapReduceBackend(BaseBackend):
         return result_groups
 
     def remove_tags(self, cluster_id, tag_keys):
-        cluster = self.get_cluster(cluster_id)
+        cluster = self.describe_cluster(cluster_id)
         cluster.remove_tags(tag_keys)
 
     def _manage_security_groups(

moto/emr/responses.py

@@ -128,7 +128,7 @@ class ElasticMapReduceResponse(BaseResponse):
     @generate_boto3_response("DescribeCluster")
     def describe_cluster(self):
         cluster_id = self._get_param("ClusterId")
-        cluster = self.backend.get_cluster(cluster_id)
+        cluster = self.backend.describe_cluster(cluster_id)
         template = self.response_template(DESCRIBE_CLUSTER_TEMPLATE)
         return template.render(cluster=cluster)
 
@@ -528,7 +528,7 @@ class ElasticMapReduceResponse(BaseResponse):
     @generate_boto3_response("PutAutoScalingPolicy")
     def put_auto_scaling_policy(self):
         cluster_id = self._get_param("ClusterId")
-        cluster = self.backend.get_cluster(cluster_id)
+        cluster = self.backend.describe_cluster(cluster_id)
         instance_group_id = self._get_param("InstanceGroupId")
         auto_scaling_policy = self._get_param("AutoScalingPolicy")
         instance_group = self.backend.put_auto_scaling_policy(