As you migrate your applications toward microservice architectures, new pains start to appear – like testing, for example. How on Earth do you verify all these separate moving parts work together before releasing? How can you be sure that your code is compatible with services that can't easily be spun up anymore? They are all written in different languages, operated by separate teams and deploy every day! Do you find yourself lying awake at night missing monolithic applications where integrations were easier to test? In this talk we'll reveal how Atlassian is adopting a new strategy called "contract testing", using the Pact open source library to test our microservices. We’ll introduce the concept of contract testing, talk about why we love this approach, and go through some examples and patterns that will help you get started.

1. Verifying Microservice
Integrations with Contract Testing
BEN SAYERS
DEV • ATLASSIAN
@BENSAYERSDEV
MAURI EDO
QA • ATLASSIAN
@MAURI_EDO

2. Based on a true story.

3. Why didn’t your tests
catch this?

4. So… How do you test?

5. Mocked dependencies

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9. Tests that mock dependencies are…

10. Trustworthy
Tests that mock dependencies are…

11. Tests that mock dependencies are…
Trustworthy
Cheap

12. Tests that mock dependencies are…
Trustworthy
Cheap
Fast

13. Tests that mock dependencies are…
Trustworthy
Cheap
Fast
Reliable

14. Tests that mock dependencies are…
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Targeted

15. Integration tests

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19. Trustworthy
Integration tests are…

20. Integration tests are…
Trustworthy
Cheap

21. Integration tests are…
Trustworthy
Cheap
Fast

22. Integration tests are…
Trustworthy
Cheap
Fast
Reliable

28. Integration tests are…
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Fast
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29. End-to-end tests

30. End-to-end
tests
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Fast
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End-to-end tests are…

32. Targeted
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End-to-end tests are…

33. Manual tests

34. Isn’t there a better way?

35. Contract testing

36. Contract testing

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SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service
Code
Tests
Pact mock

41. ~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
URCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service
Pact
Code
Tests

42. ~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
URCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service
Pact
Code
Tests

43. Response
Billing Service
Request
User service
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G

44. Sharing Pact files

45. Sharing Pact files
File system

46. Sharing Pact files
File system URL

47. Sharing Pact files
File system URL Pact Broker

48. Pact
Response
Billing Service User service
Request
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G

49. Billing Service User service
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G

51. Response
Billing Service User Service
Request
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
{
users: …
}
{
user: …
}

52. Talk to each other.

53. ~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
Pact

54. Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}

55. Pact
{
user: “Ben”
}
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}

56. {
user: “Ben”
}
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}
{
user: “Mauri”
}

57. {
user: “Ben”
}
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}
{
user: “Mauri”
}
{
user: null
}

58. {
user: “Ben”
}
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}
{
user: “Mauri”
}
{
user: null
}

59. Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}

60. {
state: “Ben @ DB”
user: “Ben”
}
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
{
user: “Ben”
}
Response
Request

61. Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
A
TLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Billing Service User Service
Response
Request
{
user: “Ben”
}
(State: Ben @ DB)

62. Talk to each other.

63. Talk to each other.
Seriously, it works.

64. Billing Service User Service
Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
Response
Request
{
user: …
}
{
users: …
}
{
user: …
}

65. ~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G
User Service
Pact
Billing Service
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
OFF-SITE 201 6
P U R C H A S I N G
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~GREED
IS
GOOD~THE
F
U
TURE OF ATLA
SSIANPURCHA
SING
O
FF-SIT
E
2016
P
U
R
C
H
A
S
IN
G
~GRE
ED
ISGOOD~
T
H
E
FUTURE OF
ATLASSIANPUR
C
HASING
OFF-SITE2016
PURCHASING
~GR
EED
ISGOOD~
T
H
EFUTUREOF
A
TLASSIAN PU
R
C
HASING
OFF-SITE 201 6
~ G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
PURCHASING
~ GREED
IS
GOOD~THE
FUTUREOFATL
A
SSIANPURCH
A
SING
~
GREEDISGO
O
D
~THEFUTUR
E
OF ATLASSIA
N
PURCHASING
OFF-SITE 201 6
P U R C H A S I N G
~SHO
W
M
ETHEMON
E
Y
~THEFUTU
RE
O F P U R CH
A
SING
AT L A S S I A N
P U R C H A S I N G

66. Closing the loop

67. Closing the loop
Manually

68. Manually Directly
Closing the loop

69. Manually Directly Pact Broker
webhook
Closing the loop

70. Manually Directly Pact Broker
webhook
Swagger
validator
Closing the loop

71. Pact
~GREED
IS
GOOD~TH
E
FUTUREOFAT
LASSIAN PURC
H
A
SING
O
FF-SITE
2016
PU
RC
H
A
SIN
G
~G
R
EEDISGOOD
~
THEFUTUREO
F
ATLASSIAN
PU
RCHASING
OFF-SITE 201 6P U R C H A S I N G
~GR
EED
ISGOOD
~
T
HEFUTUREO
F
ATLASSIAN PU
R
C
HASING
OFF-SITE 201 6
P U R C H A S I N G
~GREEDIS
G
O
OD~THEFUT
U
RE OF ATLASS
IAN
PURCHASI
N
G
OFF-SITE
2016
P U R C H A S I N G
~
G
REEDISGOO
D
~
THEFUTURE
O
F ATLASSIAN
PURCHASING
~
G
REEDISGOOD
~
THEFUTURE
O
F
ATLASSIAN
P
U
RCHASING
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Billing Service User Service
Response
Request

72. Pact
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73. Contract tests are…

74. Trustworthy
Contract tests are…

75. Contract tests are…
Trustworthy
Fast

76. Contract tests are…
Trustworthy
Fast
Reliable

77. Contract tests are…
Trustworthy
Fast
Reliable
Targeted

78. Contract tests are…
Trustworthy
Fast
Reliable
Targeted
Cheap

79. Getting started

80. pact.io

81. Supported Beta
Java
.NET
Ruby
JavaScript
Python
Swift
Go

82. “Convince me”

83. BEN SAYERS
DEV • ATLASSIAN
@BENSAYERSDEV
Verifying Microservice
Integrations with Contract Testing
MAURI EDO
QA • ATLASSIAN
@MAURI_EDO