REST does not come with an in-built contract compliance mechanism, which in many ways is a great thing. However, while working with microservice-based systems, it often appears that a practical mechanism that would provide help in shaping and describing REST contracts would come in handy. Similarly, creating integration and acceptance tests in such systems presents many challenges. In this talk, I will present Accurest, a Gradle plugin that allows for both: easily shaping REST contracts and verifying if our app adheres to them using automatically generated Spock tests. I will show how, using Accurest, we can quickly generate automatically-tested stubs from simple Groovy DSL scripts. I will talk about the typical usages and script examples, as well as possible problems and ways of handling them.

1. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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2. / oms@codearte.io@olga_maciaszek
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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3. 1. Introduction
2. Background
3. Solution
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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4. Accurest - Consumer Driven ContractsAccurest - Consumer Driven Contracts
Verifier for REST and MessagingVerifier for REST and Messaging
Easy to write scripts
Works out of the box with Gradle and Maven
Automatically generated WireMock and Messaging stubs
Automatically generated Spock/ JUnit tests
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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5. Tech StackTech Stack
Gradle, Maven
Java, Groovy
REST: Standalone App, MockMvc, JAX-RS
Messaging: Spring Integration, Spring Cloud Stream,
Apache Camel
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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6. MonolithMonolith
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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7. Lengthy and Costly Development Process
Long Testing Times
Long Deployment Times
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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8. MicroservicesMicroservices
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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9. Many smaller services
Each team responsible for its service
REST communication
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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10. New Issues and ChallengesNew Issues and Challenges
Creating and modifying REST contracts
Testing a Microservice-based system
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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11. New Issues and ChallengesNew Issues and Challenges
Creating and modifying REST contracts
Testing a Microservice-based system
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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12. One server + limited clients
vs.
Multiple client/servers communicating with each other
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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13. Defining and modifying REST contracts much more often
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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14. Quick information when the REST contract is modified
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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15. Various clients requesting different changes at the same
time
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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16. RequirementsRequirements
Consumer Driven Contracts
All consumers need to be notified when the Contract has
changed
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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17. New Issues and ChallengesNew Issues and Challenges
Creating and modifying REST contracts
Testing a Microservice-based system
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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18. Monolith E2E TestsMonolith E2E Tests
Comprehensive
Verified borders
Considerably improved safety
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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19. 1 to rule them all1 to rule them all
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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20. Against the very idea of microservices!Against the very idea of microservices!
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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21. 1 pipeline per service, all the1 pipeline per service, all the
collaborators addedcollaborators added
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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22. Too costly!Too costly!
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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23. Stubbed collaboratorsStubbed collaborators
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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24. Stubs get corrodedStubs get corroded
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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25. RequirementsRequirements
Stubs required
Validating stubs against servers required
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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26. RequirementsRequirements
Consumer Driven Contracts
All consumers need to be notified when the Contract has
changed
Stubs required
Validating stubs against servers required
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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27. AccurestAccurest
Scripts that define the REST contracts are submitted as PRs
by the client teams
Scripts are used to generate both WireMock stubs and
server tests
New server version along the new stubs only published
when server tests have passed
Client services download server stubs and use them for
tests
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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28. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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29. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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30. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
30 z 112 13.06.2016 13:47

31. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
31 z 112 13.06.2016 13:47

32. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
32 z 112 13.06.2016 13:47

33. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
33 z 112 13.06.2016 13:47

34. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
34 z 112 13.06.2016 13:47

35. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
35 z 112 13.06.2016 13:47

36. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
36 z 112 13.06.2016 13:47

37. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
37 z 112 13.06.2016 13:47

38. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
38 z 112 13.06.2016 13:47

39. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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40. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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41. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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42. WireMockWireMock
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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43. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
43 z 112 13.06.2016 13:47

44. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
} ,
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
44 z 112 13.06.2016 13:47

45. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
45 z 112 13.06.2016 13:47

46. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
46 z 112 13.06.2016 13:47

47. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
47 z 112 13.06.2016 13:47

48. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
48 z 112 13.06.2016 13:47

49. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
49 z 112 13.06.2016 13:47

50. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
50 z 112 13.06.2016 13:47

51. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
51 z 112 13.06.2016 13:47

52. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
52 z 112 13.06.2016 13:47

53. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
53 z 112 13.06.2016 13:47

54. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
54 z 112 13.06.2016 13:47

55. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
55 z 112 13.06.2016 13:47

56. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
56 z 112 13.06.2016 13:47

57. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
57 z 112 13.06.2016 13:47

58. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
58 z 112 13.06.2016 13:47

59. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId == '12345678902')]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
59 z 112 13.06.2016 13:47

60. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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61. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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62. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertTassertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
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63. com.jayway.RestAssured
com.toomuchcoding.jsonassert
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64. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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65. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertTassertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
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66. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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67. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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68. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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69. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
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70. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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71. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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72. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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73. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
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74. Base Test ClassBase Test Class
class BaseMockMvcSpec extends Specification {
def setup() {
RestAssuredMockMvc.standaloneSetup(new PairIdController())
}
}
@ContextConfiguration(classes = [PaymentResourceStubContext,
ClientResourceStubContext],
loader = SpringApplicationContextLoader)
@WebIntegrationTest
class BaseAccurestSpec extends Specification {
@Autowired
ApplicationContext context
}
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75. Regular Expression SupportRegular Expression Support
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76. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: value(stub(regex('[0-9]{11}')), test("12345678902")),
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(
fraudCheckStatus: "FRAUD",
rejectionReason: "Amount too high"
)
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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77. {
"request" : {
"url" : "/fraudcheck",
"method" : "PUT",
"bodyPatterns" : [ {
"matchesJsonPath" : "$[?(@.loanAmount == 99999)]"
}, {
"matchesJsonPath" : "$[?(@.clientId =~ /[0-9]{11}/)]"
} ],
"headers" : {
"Content-Type" : {
"equalTo" : "application/vnd.fraud.v1+json"
}
}
},
"response" : {
"status" : 200,
"body" : "{"fraudCheckStatus":"FRAUD",
"rejectionReason":"Amount too high"}",
"headers" : {
"Content-Type" : "application/vnd.fraud.v1+json"
}
}
}
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78. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902" ,"loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("rejectionReason")
.isEqualTo("Amount too high")
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
}
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79. Executing Custom Methods on theExecuting Custom Methods on the
ServerServer
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80. io.codearte.accurest.dsl.Accurest.make
request {
method 'PUT'
url '/fraudcheck'
body(
clientId: "12345678902",
loanAmount: 99999
)
headers {
header('Content-Type', 'application/vnd.fraud.v1+json')
}
}
response {
status 200
body(fraudCheckStatus: "FRAUD",
rejectionReason: value(stub("Amount too high"),
test(execute('isCorrectRejectionReason($it)'))))
headers {
header('Content-Type': 'application/vnd.fraud.v1+json')
}
}
}
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81. abstract class BaseMockMvcSpec extends Specification {
def setup() {
RestAssuredMockMvc.standaloneSetup(new FraudDetectionController())
}
void isCorrectRejectionReason(String rejectionReason) {
assert rejectionReason == 'Amount too high'
}
}
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82. def validate_shouldMarkClientAsFraud() {
given:
def request = given()
.header('Content-Type', 'application/vnd.fraud.v1+json')
.body('{"clientId":"12345678902","loanAmount":99999}')
when:
def response = given().spec(request).put("/fraudcheck")
then:
response.statusCode == 200
response.header('Content-Type') == 'application/vnd.fraud.v1+json'
and:
DocumentContext parsedJson = JsonPath.parse(response.body.asString())
assertThatJson(parsedJson).field("fraudCheckStatus").isEqualTo("FRAUD")
isCorrectRejectionReason(parsedJson.read('$.rejectionReason'))
}
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83. DSL - Other Available FunctionalitiesDSL - Other Available Functionalities
Query Parameters
Optional Fields
Nested Elements
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84. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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85. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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86. Stubs published as jars to theStubs published as jars to the
repositoryrepository
Jar, archive
Maven Publish Plugin
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87. Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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88. StubRunnerStubRunner
Automated stubs download from the repository
Automated launching of WireMock server instances and
mounting the stubs
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89. StubRunner DependenciesStubRunner Dependencies
dependencies {
testCompile 'io.codearte.accurest:stub-runner:1.1.0-M7'
testCompile 'io.codearte.accurest:stub-runner-junit:1.1.0-M7'
testCompile 'io.codearte.accurest:stub-runner-spring:1.1.0-M7'
testCompile 'io.codearte.accurest:stub-runner-spring-cloud:1.1.0-M7'
}
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90. Accurest JUnit RuleAccurest JUnit Rule
@ClassRule
@Shared
AccurestRule accurestRule = new AccurestRule().repoRoot('http://www.myrepo.com')
.minPort(11000).maxPort(12000) [ || .withPort(8090)]
.downloadStub('com.toomuchcoding:fraudDetectionService')
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91. Out of the box support for Spring andOut of the box support for Spring and
SpringCloudSpringCloud
StubRunnerConfiguration
@Autowired StubFinder
StubRunnerDiscoveryClient
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92. MessagingMessaging
Automated testing of messages created by the producer
Producer's messages automatically provided for consumer
tests by StubRunner
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93. Producer SideProducer Side
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94. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo'
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
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95. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage, 'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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96. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
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97. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage, 'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
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98. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
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99. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage, 'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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100. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
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101. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage, 'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
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102. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
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103. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''>
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage,'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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104. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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105. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''>
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage,'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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106. io.codearte.accurest.dsl.Accurest.make {
description 'Some Description'
label 'some_label'
input {
messageFrom('input')
messageBody([
bookName: 'foo'
])
messageHeaders {
header('sample', 'header')
}
}
outputMessage {
sentTo('output')
body([
bookName: 'foo
])
headers {
header('BOOK-NAME', 'foo')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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107. def validate_shouldMakeMessageTest() throws Exception {
given:
def inputMessage = accurestMessaging.create('''{"bookName":"foo"}'''>
,[
'sample': 'header'
])
when:
accurestMessaging.send(inputMessage,'input')
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
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108. io.codearte.accurest.dsl.Accurest.make {
description 'Some description'
label 'some_label'
input {
triggeredBy('bookReturnedTriggered()')
}
outputMessage {
sentTo('output')
body('''{ "bookName" : "foo" }''')
headers {
header('BOOK-NAME', 'foo')
}
}
}
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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109. def validate_shouldMakeMessageTest() throws Exception {
when:
bookReturnedTriggered()
then:
def response = accurestMessaging.receiveMessage('output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper
.writeValueAsString(response.payload))
assertThatJson(parsedJson).field("bookName").isEqualTo("foo")
}
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110. Consumer SideConsumer Side
testCompile "io. codearte.accurest:accurest-messaging-camel:${accurestVersion}"
testCompile "io.codearte.accurest:accurest-messaging-integration:${accurestVersion}"
testCompile "io.codearte.accurest:accurest-messaging-stream:${accurestVersion}"
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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111. Possible IssuesPossible Issues
Complex Systems
Test Base Class
Gradle Setup
Young solution
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
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112. / /
Thank youThank you
https://github.com/Codearte/accurest
branch:
08_publish_stubs
https://github.com/OlgaMaciaszek/cdc_examples
branch: 02_with_accurest_rule
https://github.com/OlgaMaciaszek
/LoanApplicationService
Olga Maciaszek-Sharma @olga_maciaszek
oms@codearte.io
Creating and Testing REST and Messaging Contracts with Accurest http://localhost:8000/?print-pdf#/
112 z 112 13.06.2016 13:47