Anyone have any tips/tricks for mocking API calls ...
# awsf
freezing-van-87649
10/14/2021, 1:40 PMAnyone have any tips/tricks for mocking API calls in tests (python, specifically)?
I’m using iam.get_policy_document a couple places in code I’m trying to test and writing a manual mock for it feels wrong
g
great-sunset-355
10/14/2021, 2:11 PMif nothing works, maybe
VCRpyl
little-cartoon-10569
10/14/2021, 6:43 PMDo you need to fake it out? That one should be ok to call from unit tests, it's a self-contained function. No async calls.
f
freezing-van-87649
10/14/2021, 7:23 PMIs there a way to selective mock?
freezing-van-87649
10/14/2021, 7:23 PMI’m doing mocks similar to what’s shown here.
Copy code
import pulumi
class MyMocks(pulumi.runtime.Mocks):
def new_resource(self, args: pulumi.runtime.MockResourceArgs):
return [args.name + '_id', args.inputs]
def call(self, args: pulumi.runtime.MockCallArgs):
return {}
pulumi.runtime.set_mocks(MyMocks())freezing-van-87649
10/14/2021, 7:24 PMso there aren’t any actual HTTP calls that
VCRpyfreezing-van-87649
10/14/2021, 7:24 PMand I don’t see a clear way to conditionally proxy calls through to the actual provider
freezing-van-87649
10/14/2021, 7:24 PMunless I create a provider and call it within the mock?
l
little-cartoon-10569
10/14/2021, 7:51 PMDoes that method use the normal Pulumi technique of building up what's essentially an AST for resources and turning it into a diffable state? I thought that method is just a wrapper around JSON.stringify and similar.. could be wrong though.
little-cartoon-10569
10/14/2021, 7:52 PMIf it's handled in the normal Pulumi way, I'd suggest that the easiest thing to do is to duplicate the code into your own codebase and call it from the
call()little-cartoon-10569
10/14/2021, 7:52 PMLet me have a look at the source.
little-cartoon-10569
10/14/2021, 7:56 PMAh no, I'm thinking of
new PolicyDocumentlittle-cartoon-10569
10/14/2021, 7:59 PMHowever it is related: to fake this out (sorry, I won't use "mock", none of these things are true mocks and imo the work is misleading here), I would implement a cast to
PolicyDocumentcall()getPolicyDocument()little-cartoon-10569
10/14/2021, 8:02 PMDoes the Python lib have the PolicyDocument type, like typescript does?
little-cartoon-10569
10/14/2021, 8:10 PMI've looked through the source, I can't see anything like it.
f
freezing-van-87649
10/14/2021, 8:13 PMThere’s a
GetPolicyDocumentResultfreezing-van-87649
10/14/2021, 8:14 PMyeah, maybe I should just stop using that particular method and stick with vanilla dicts/lists
l
little-cartoon-10569
10/14/2021, 8:43 PMNot GetPolicyDocumentResult, that's different. I was hoping you could use a nice feature in the typescript SDK that essentially does
getPolicyDocument()call()getPolicyDocument()little-cartoon-10569
10/14/2021, 8:43 PMKomal Ali pointed me at the code a few months ago, but I can't find it now 😞
f
freezing-van-87649
10/14/2021, 9:09 PMIdeally I’d probably be able to just proxy the call through to the real provider, but it’s not a huge deal to work around
l
little-cartoon-10569
10/14/2021, 9:21 PMSince that call would involve invoking the TF engine (assuming you're not using aws-native), that would be async and (compared to everything else in the unit test) slow. It would be better to reimplement, imo.
👍 1
little-cartoon-10569
10/14/2021, 9:22 PMAnd since it's just a JSON formatting exercise, I think it should be pretty easy to implement.
little-cartoon-10569
10/14/2021, 9:23 PMUnless you need to assert on the content of the doc, then you probably don't even have to format the JSON. Just return "{}" and leave it at that.
f
freezing-van-87649
10/14/2021, 9:30 PMYeah, I’m checking the content.
For condition
XY