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README.md

React Inversion Of Control Web Part with Unit Tests using Jest and Enzyme

Summary

This web part is provided as an example of implementing an IoC (Inversion of Control) pattern in the context of a SharePoint Framework web part.

Following this pattern greatly improves the modularity, maintainability, and testability of the code.

The example includes 100% test coverage, using Jest and Enzyme, of .ts and .tsx files, excluding *WebPart.ts files. A dependency injector class specific to a web part class is used to map web part properties to component properties and create dependencies. This pattern is designed to remove logic from the *WebPart.ts file, the only ts file that isn't unit tested, and hence ensure that all relevant web part logic is tested.

Included in the coverage is a cache and logger class, along with a service class that fetches data asychronously using @PnP/sp and dynamic bundling.

The example also includes a pipeline definition .yaml file for Azure DevOps CI build pipeline (/pipelines/) which includes the build, running tests, and posting the test coverage results.

Sample SPFx Web Part implementing IoC pattern

Used SharePoint Framework Version

drop

Applies to

Solution

Solution Author(s)
react-ioc-tests Paul Ryan

Version history

Version Date Comments
1.0 March 20, 2019 Initial release

Disclaimer

THIS CODE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.


Minimal Path to Awesome

  • Clone this repository
  • in the command line run:
    • npm install
    • npm test
    • gulp serve

Features

This web part is provided as an example of implementing an IoC (Inversion of Control) pattern in the context of a SharePoint Framework web part. This Web Part illustrates the following concepts on top of the SharePoint Framework:

  • Inversion of Control pattern
  • Unit testing with Jest and Enzyme
  • Azure DevOps CI Build Pipeline yaml definition file, includes running tests and checking code coverage

References

https://github.com/SharePoint/sp-dev-fx-webparts/tree/master/samples/react-jest-testing

https://blog.velingeorgiev.com/unit-test-your-sharepoint-framework-solution-with-jest

https://www.eliostruyf.com/sharepoint-framework-unit-tests-with-jest/

https://github.com/estruyf/spfx-testing-jest

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