If a new version of an API is being released, how can contract testing be used to ensure backward compatibility with existing consumers?
- By assuming that backward compatibility is automatic and doesn't require testing.
- By creating and maintaining backward-compatible contracts and running contract tests against both the new and old versions.
- By deprecating the old API version immediately upon release of the new version.
- By notifying consumers to update their systems to match the new API version without testing.
Contract testing helps ensure backward compatibility by creating and maintaining backward-compatible contracts. Running contract tests against both the new and old versions verifies that changes in the new version do not break existing consumers. Notifying consumers without testing, deprecating immediately, or assuming automatic compatibility can lead to unforeseen issues.
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