e2etests

e2etests test the end-to-end flow of turning D2 scripts into a rendered diagram

Tests fall under 1 of 4 categories:

1. Stable. Scripts which produce diagrams that never had issues this major release.
2. Regressions. Scripts which used to have issues but no longer do. Each one should be linked to the PR which fixed it.
3. Todos. Scripts which have an issue. If the issue prevents compile, skip: true can be set, otherwise the issue is visual. Each one should be linked to a Github Issue which describes it.
4. Real-world. Substantial diagrams from other projects, preserved with source revisions, adaptations, and licenses in testdata/files/REAL_WORLD.md. Each fixture runs through both Dagre and ELK using the same checks as the other e2e groups.

Upon a major release, Regressions are carried over to Stable.

If a change results in test diffs, you can run this script to generate a visual HTML report with the old vs new renders.

go run ./e2etests/report/main.go -delta
open ./e2etests/out/e2e_report.html