Snapshot testing

Pros:

• Easy to write tests

• The cheaperst way to increase code coverage

• Documentanion role (devleloper able to see the markup of the component in different cases)

Cons:

• Failures are hard to understand (It’s often hard to see what changed by looking at the snapshot failure diff)

• We tend to update snapshots without thinking

• Easy to commit snapshots with bugs (since we usually don’t read these files carefully)

• Coupling with low level modules (if you don’t use shallow rendering)

• A false sense of security (Snapshots offer no guarantees that component appearance or behavior is correct)