Soirée du Test Logiciel - Test Driven Development with graph databases - S. DARGO, Amadeus
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![11
©AmadeusITGroupanditsaffiliatesandsubsidiaries
Creating test data with Cypher
CREATE (eger:WineRegion {name:'Eger'})-[:CONTAINS]
->(eger_subregion:WineSubRegion {name:'Eger'}),
(eger)-[:CONTAINS]->(matra:WineSubRegion {name:'Mátra'}),
(eger)-[:CONTAINS]->(bukk:WineSubRegion {name:'Bükk'}),
(eger_subregion)<-[:GROWS_AT]-(merlot:Grape {name:'Merlot'}),
(eger_subregion)<-[:GROWS_AT]-(pinot_noir:Grape {name:'Pinot Noir'}),
(eger_subregion)<-[:GROWS_AT]-(cabernet_franc:Grape {name:'Cabernet Franc'})](https://image.slidesharecdn.com/dargo-tdd-with-graph-databases-171024145025/75/soire-du-test-logiciel-test-driven-development-with-graph-databases-s-dargo-amadeus-9-2048.jpg?cb=1666936791)
![12
©AmadeusITGroupanditsaffiliatesandsubsidiaries
Simple query with Cypher
MATCH (eger:WineRegion {name:'Eger'})-
[relationship:CONTAINS] ->
(subregion:WineSubRegion)
RETURN eger, relationship, subregion](https://image.slidesharecdn.com/dargo-tdd-with-graph-databases-171024145025/75/soire-du-test-logiciel-test-driven-development-with-graph-databases-s-dargo-amadeus-10-2048.jpg?cb=1666936791)
![_Ideal when a relationship is OPTIONAL
_Will use null for missing part of a pattern
_Example:
13
©AmadeusITGroupanditsaffiliatesandsubsidiaries
OPTIONAL MATCH
MATCH (wr:WineRegion)-[:CONTAINS]→
(wsr:WineSubRegion {name:{subregionName}})
OPTIONAL MATCH (wsr)<-[:GROWS_AT]-(grape:Grape)
RETURN wr, wsr, grape](https://image.slidesharecdn.com/dargo-tdd-with-graph-databases-171024145025/75/soire-du-test-logiciel-test-driven-development-with-graph-databases-s-dargo-amadeus-11-2048.jpg?cb=1666936791)
Soirée du Test Logiciel - Test Driven Development with graph databases - S. DARGO, Amadeus
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Dojo : Test Driven Development with graph databases (En anglais) 05/10/17 - Sophia Antipolis
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Soirée du Test Logiciel - Test Driven Development with graph databases - S. DARGO, Amadeus
- 1. Test driven development with graph databases @SandorDargo 05/10/2017, Soiree du Test Logiciel ©AmadeusITGroupanditsaffiliatesandsubsidiaries
- 2. _Father of one _Developer at Amadeus _Blogger – http://sandordargo.com _Amateur of graph databases 3 ©AmadeusITGroupanditsaffiliatesandsubsidiaries Who am I?
- 3. _Not a store of excel charts _Not a data visualization tool 5 ©AmadeusITGroupanditsaffiliatesandsubsidiaries What is not a graph database?
- 4. _Type of NoSQL database _Based on the concepts introduced by Leonhard Euler _Collections of nodes and relationships 6 ©AmadeusITGroupanditsaffiliatesandsubsidiaries What is a graph(-oriented) database?
- 5. _Graph = Nodes + Relationships _Property Graph = Graph + key-value attributes/properties _Labelled Property Graph = Property Graph + Tags/Labels 7 ©AmadeusITGroupanditsaffiliatesandsubsidiaries Labelled Property Graph Data Model
- 7. _Topologies _Social data _Page ranking _Analyse highly connected data (Panama papers) 9 ©AmadeusITGroupanditsaffiliatesandsubsidiaries When to use a graph (i.e. advantages of a graph)? “If you can whiteboard it, you can graph it”
- 8. _Graph database with three different node types • Wine regions (e.g. Provence) • Wine subregions (e.g. Bandol) • Grapes (e.g. Mourvedre) _Develop services to retrieve the nodes by name and the related nodes _Use Java or Python (Java 8 tonight) _Start code for Java at: https://github.com/sandordargo/neo-wine- services/tree/starting-code 10 ©AmadeusITGroupanditsaffiliatesandsubsidiaries Code Kata
- 9. 11 ©AmadeusITGroupanditsaffiliatesandsubsidiaries Creating test data with Cypher CREATE (eger:WineRegion {name:'Eger'})-[:CONTAINS] ->(eger_subregion:WineSubRegion {name:'Eger'}), (eger)-[:CONTAINS]->(matra:WineSubRegion {name:'Mátra'}), (eger)-[:CONTAINS]->(bukk:WineSubRegion {name:'Bükk'}), (eger_subregion)<-[:GROWS_AT]-(merlot:Grape {name:'Merlot'}), (eger_subregion)<-[:GROWS_AT]-(pinot_noir:Grape {name:'Pinot Noir'}), (eger_subregion)<-[:GROWS_AT]-(cabernet_franc:Grape {name:'Cabernet Franc'})
- 10. 12 ©AmadeusITGroupanditsaffiliatesandsubsidiaries Simple query with Cypher MATCH (eger:WineRegion {name:'Eger'})- [relationship:CONTAINS] -> (subregion:WineSubRegion) RETURN eger, relationship, subregion
- 11. _Ideal when a relationship is OPTIONAL _Will use null for missing part of a pattern _Example: 13 ©AmadeusITGroupanditsaffiliatesandsubsidiaries OPTIONAL MATCH MATCH (wr:WineRegion)-[:CONTAINS]→ (wsr:WineSubRegion {name:{subregionName}}) OPTIONAL MATCH (wsr)<-[:GROWS_AT]-(grape:Grape) RETURN wr, wsr, grape
- 12. Thank you! ©AmadeusITGroupanditsaffiliatesandsubsidiaries You can follow us on: AmadeusITgroup amadeus.com Amadeus.com/blog