| # Snapshot tests | |
| Snapshot testing runs the compiler on many of the test projects in test/fixtures/execute and verifies that the compiled output is identical to a pre-calculated "snapshot". This verifies: | |
| - The compiler is deterministic (mostly) | |
| - The compiler's output does not change unexpectedly | |
| - Optimizations and type analysis in the generated code are working properly | |
| These snapshots are automatically verified as part of the integration tests. There is also a more readable CLI for humans. To verify the snapshots: | |
| ``` | |
| node test/snapshot | |
| ``` | |
| When the compiler's output or the test projects have intentionally changed, run: | |
| ``` | |
| node test/snapshot --update | |
| ``` | |
| Verify that the snapshot diff is what you expect, then commit the changes. | |