There is one engine and nine doors into it, and nothing until now checked
that the doors agree. CI tested each binding against itself: the Python
wheel imported, the C demo compiled, the npm package type-checked. None
of that would have caught a field that crosses one boundary wrong, which
is the failure this library is most exposed to, because a wrong answer
about a fast day looks exactly like a right one.
So: twelve days, chosen where the bindings could plausibly differ, and
all twenty-two fields compared against what the command line says. The
days are Pascha itself, the Nativity on both calendars, a Wednesday of
the Great Fast under Byzantine Catholic law and again at the Typikon, a
weekday of the Nativity Fast where Greek and Slavic usage part, the one
Orthodox church on the Gregorian Paschalion, and a day with no feast.
A release now runs what a push runs. It had been gated on cargo test
alone, so the C ABI, the Lua binding, the Python parity check and the
README examples were checked on the branch that led to a release and not
on the release. Neither registry will reuse a version, so the gate
belongs before the upload.
Writing it found three things. The npm exports map did not expose the
wasm by package path, so a bundler asked for typikon/web/typikon_bg.wasm
was told no such path exists and had to reach into node_modules; the
documented init() call was never affected. The suite could hang instead
of fail, because the test web server was backgrounded inside a subshell
and killed by job spec, leaving bash in do_wait forever. And pointing
XDG_CONFIG_HOME at a path that does not exist isolates typikon and
breaks every other program that keeps state under it, a browser included.
A surface whose toolchain is missing is named as skipped, and fewer than
three surfaces running is a failure rather than a pass, so a container
with nothing installed cannot come out green.
WebAssembly rather than a native Node addon: one artifact serves Node,
Deno, Bun, a browser and anything built on them, where napi would have
meant a prebuilt binary per platform and a source build for whoever the
matrix missed. The engine is pure computation and the menologion is
already compiled in, so there is nothing for it to give up.
A day comes back as a plain object, not a handle. A wasm class would
have meant a .free() that every caller eventually forgets, and this way
JSON.stringify works and the thing spreads into state. Two serializer
defaults had to be overridden to keep the promise that it is the same
document --json emits: maps as objects, and an absent field as null
rather than undefined, which stringify would otherwise drop entirely.
The TypeScript is hand-written, because the generated types for a value
crossing as JsValue are `any`, and a binding that types its whole
return as `any` is a binding TypeScript cannot check. tsc --strict is a release
gate now, the way mypy --strict already is, and the check includes three
lines that must fail to compile.
The one place this differs from every other binding: no remembered
default jurisdiction, because a browser has nowhere to keep one. It is
called out in the README, in the types and in docs/versioning.md.
The test resolves typikon through a staged node_modules rather than a
relative path, so what it exercises is the exports map, and it compares
a year of days field by field against the command line for four
jurisdictions.
funkpower