8. available in Austria, Switzerland,
Germany, Japan, Canada and Italy
USA coming soon ;-)
9.
10.
11. “Netflix for sports”
offices in London, Leeds, Katowice and Tokyo
We’re hiring! Visit
engineering.dazn.com to
learn more.
follow @dazneng for updates
about the engineering team.
24. a set of practices to reduce the time
between committing a change to a system
and the change being placed into normal
production, while ensuring high quality
25. a set of practices to reduce the time
between committing a change to a system
and the change being placed into normal
production, while ensuring high quality
56. “…We find that tests that mock external
libraries often need to be complex to
get the code into the right state for the
functionality we need to exercise.
The mess in such tests is telling us that
the design isn’t right but, instead of
fixing the problem by improving the
code, we have to carry the extra
complexity in both code and test…”
Don’t Mock Types You Can’t Change
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57. “…The second risk is that we have to be
sure that the behaviour we stub or mock
matches what the external library will
actually do…
Even if we get it right once, we have to
make sure that the tests remain valid
when we upgrade the libraries…”
Don’t Mock Types You Can’t Change
https://amzn.to/29Lxuzu
58. Don’t Mock Types You Can’t Change
Services
https://amzn.to/29Lxuzu
63. is our request correct?
is the request mapping
set up correctly?is the API resources
configured correctly?
are we assuming the
correct schema?
LambdaAPI Gateway DynamoDB
is Lambda proxy
configured correctly?
is IAM policy set
up correctly?
is the table created?
what unit tests will not tell you…
64.
65. most Lambda functions are simple
have single purpose, the risk of
shipping broken software has largely
shifted to how they integrate with
external services
observation
68. …if a service can’t provide
you with a relatively easy
way to test the interface in
reality, then you should
consider using another one.
Paul Johnston
69. “…Wherever possible, an acceptance
test should exercise the system end-to-
end without directly calling its internal
code.
An end-to-end test interacts with the
system only from the outside: through
its interface…”
Testing End-to-End
145. “Netflix for sports”
offices in London, Leeds, Katowice and Tokyo
We’re hiring! Visit
engineering.dazn.com to
learn more.
follow @dazneng for
updates about the
engineering team.
146. API Gateway and Kinesis
Authentication & authorisation (IAM, Cognito)
Testing
Running & Debugging functions locally
Log aggregation
Monitoring & Alerting
X-Ray
Correlation IDs
CI/CD
Performance and Cost optimisation
Error Handling
Configuration management
VPC
Security
Leading practices (API Gateway, Kinesis, Lambda)
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