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ERLANG  +BDD  +  

CUCUMBERL

ERLANG  FACTORY  SF  2011STEVE  YENMATT  INGENTHRON

Agenda

BDD  and  cucumber

Membase

Cluster  tes5ng

cucumberl

Demo

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BDD+  

CUCUMBER

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What  is  BDD?

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cucumber?

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h?p://cukes.info

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why  cucumber?

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because  your  friends  use  ruby

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because  your  friends  use  ruby

friend  ==  web  app  dev

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because  your  friends  use  ruby

friend  ==  web  app  dev

web  app  ==  ruby  on  rails

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(or  some  RoR  clone)12

(or  some  RoR  clone)13

CHICAGO BOSS

cucumber  syntaxis  readable

by  business  guys

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 why  not  cucumber?

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cucumber  syntaxis  readable

by  business  guystoo  english-­‐y

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Scenario: Add two numbersGiven I have entered 5 And I have entered 7 When I press add Then the result should be 12

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Scenario: Add two numbersGiven I have entered 5 And I have entered 7 When I press add Then the result should be 12

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Scenario: Add two numbersGiven I have entered 5 And I have entered 7 When I press add Then the result should be 12

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Scenario: Add two numbersGiven I have entered 5 And I have entered 7 When I press add Then the result should be 12

20vs: ?assert(add(5, 7) =:= 12).

cucumber  =/=  eunit.

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cucumber  =/=  quickcheck.

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cucumber  +  BDD

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MEMBASE

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Membase is Clustered by Erlang

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Membase  Servers

Web  applica5on  server

Applica5on  user

In  the  Data  Center

Web  applica5on  serverWeb  applica5on  server

HUMAN  DRIVEN  SCENARIO

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CLUSTER  TESTING

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Scenario: Node goes down

Given I have configured nodes A and B

And they are already joined When node A goes down

Then node B sees that node A is down

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Scenario: Node goes down

Given I have configured nodes A and B

And they are already joined When node A goes down

Then node B sees that node A is down

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Scenario: Node goes down, in 3 node cluster

Given I have configured nodes A, B and C

And they are already joined When node A goes down

Then node B sees that node A is down

And node C sees that node A is down

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Scenario Outline: Join 3 nodes, A, B, C

Given I have configured nodes A, B and C

And they are not joined When I join node <joiner1> to <joinee1>

And I join node <joiner2> to <joinee2>

Then all nodes know about each other

Examples:

| joiner1 | joinee1 | joiner2 | joinee2 |

| A | B | C | B | | A | B | C | A |

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Scenario Outline: Join 3 nodes, A, B, C

Given I have configured nodes A, B and C

And they are not joined When I join node <joiner1> to <joinee1>

And I join node <joiner2> to <joinee2>

Then all nodes know about each other

Examples:

| joiner1 | joinee1 | joiner2 | joinee2 |

| A | B | C | B | | A | B | C | A |

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Scenario: Join 2 nodes

Given I have configured nodes A and B

And they are not joined When I join node A to B

Then all nodes know about each other

...lives in “simple_cluster.feature”

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step definitions

34emacs time...

CUCUMBERL

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“I wish I could write my step definitions in

erlang”

“I wish I could write my step definitions in

erlang”

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and,  C  ...#lazyweb  request:  

“C  cucumber”  anyone?

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“I wish I could write my step definitions in

erlang”

h?ps://github.com/membase/cucumberl

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MIT40

one  file41

src/cucumber.erl

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samples

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CUKE  DEMO

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Q  &  A

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Data management for interactive web and mobile applications.

STEVE  YENSTEVE@COUCHBASE.COM@STEVEYENTWEETS

MATT  INGENTHRONMATT@COUCHBASE.COM@INGENTHR