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Fix: EMR Steps should be returned in reverse order of creation

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This is according to the AWS EMR documentation[1] and has been verified against a real AWS backend.

[1]:https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr.html#EMR.Client.list_steps
This commit is contained in:
Brian Pandola 2022-03-19 22:08:18 -07:00 committed by Brian Pandola
parent a90d8c801b
commit 626629ef82
2 changed files with 10 additions and 2 deletions
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6
moto/emr/models.py
View File

@ -560,7 +560,11 @@ class ElasticMapReduceBackend(BaseBackend):
def list_steps(self, cluster_id, marker=None, step_ids=None, step_states=None):
max_items = 50
steps = self.clusters[cluster_id].steps
steps = sorted(
self.clusters[cluster_id].steps,
key=lambda o: o.creation_datetime,
reverse=True,
)
if step_ids:
steps = [s for s in steps if s.id in step_ids]
if step_states:

6
tests/test_emr/test_emr_boto3.py
View File

@ -1013,6 +1013,10 @@ def test_steps():
steps = client.list_steps(ClusterId=cluster_id)["Steps"]
steps.should.have.length_of(2)
# Steps should be returned in reverse order.
sorted(
steps, key=lambda o: o["Status"]["Timeline"]["CreationDateTime"], reverse=True
).should.equal(steps)
for x in steps:
y = expected[x["Name"]]
x["ActionOnFailure"].should.equal("TERMINATE_CLUSTER")
@ -1044,7 +1048,7 @@ def test_steps():
# x['Status']['Timeline']['EndDateTime'].should.be.a('datetime.datetime')
# x['Status']['Timeline']['StartDateTime'].should.be.a('datetime.datetime')
step_id = steps[0]["Id"]
step_id = steps[-1]["Id"] # Last step is first created step.
steps = client.list_steps(ClusterId=cluster_id, StepIds=[step_id])["Steps"]
steps.should.have.length_of(1)
steps[0]["Id"].should.equal(step_id)