Snapshot aims to reduce the complexity of unit tests, and provide test documentation in the form of JSON files.
It is an implementation of the Jest Snapshot Testing concept that is found in React Javascript unit testing.
First install the NuGet package Snapshot. Currently only a pre-release version exists: 0.4.0-alpha.
Next use SnapshotAssert to generate Snapshot files. See these tests for an example of the expected behaviour.
- Testing the output of mapping logic, replace multiple assertions with a single snapshot.
- Asserting that there are no changes in the response of an API.
- No test runner output / warnings alerting you that a snapshot has been updated / created.
- Calling
.Snapshot(..)from a non-Fact/Theory method will use that method name for the naming of the snapshot JSON file. This can cause issues when using that non-Fact/Theory method for multiple tests.
See Contributing.md.