Ryth Azhur
3aafec6dd4
The IR called them react-message and django-message, so a FastAPI channel had to declare a DjangoMessage. They are client-message and server-message now, and the direction words hold wherever a channel is declared: Params / ClientMessage / ServerMessage, with mizan-core deriving <Pascal>Params and friends so no backend names a type itself. Django's ReactChannel and FastAPI's ReactChannel are both Channel. mizan-fastapi never registered a channels extension, so build_ir() emitted no channel at all and every payload type was invisible to codegen. It registers one now. RegistryExtension is an ABC requiring all(), which is what the IR reads — an extension that cannot enumerate its registrations no longer exists. The gate that should have caught the rename could not: tests/afi registered no channel because mizan-rust had no channel registry to register one in, so a five-package rename of the wire contract passed byte-parity without a channel byte crossing it. mizan-rust grows ChannelSlotKind, a CHANNELS slice, a #[mizan::channel] macro, and KDL emission whose wire_to_pascal matches Python's split; the AFI fixture now carries a channel with every slot and one with a single slot, so all three backends prove the contract byte for byte. MizanChannel held three Option<String> beside three has_*() predicates and unwrapped them with defaults; it holds an ordered slot vector, so an absent slot is absent rather than defaulted. The channels target emitted a React hooks file that a stage1-only consumer could not compile — react emits that now. The codegen's parity tests byte-compared emitted source against baselines without ever compiling it: they compile the generated crate and run its tests, import the generated Python package and call every method, and typecheck each TypeScript target against a consumer. Also fixed at source: app_visitor printed its import diagnostic to stdout, the stream export_mizan_ir writes KDL to, so a failed import silently corrupted the IR; the apps root was hardcoded to "apps"; _default_literal crashed build_ir on any non-JSON-serializable field default; Django and mizan-core derived Pascal names two different ways, disagreeing on every dotted channel name. ir.py builds a document and renders templates/ir/document.kdl.j2 rather than appending KDL strings with hand-tracked indentation, and named types resolve to a fixed point — a model reachable only through a union branch was referenced by a ref that no type block ever defined. The rest is the write-gate's own classifiers run over the standing tree: relative imports, silent swallows, Protocol contracts that should be ABCs, emitters hand-rendering target source, catch-all arms over closed enums, and comments narrating the project rather than the code. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
69 lines
1.8 KiB
Rust
69 lines
1.8 KiB
Rust
//! `verify_invariants()` over a graph where one `merge` declaration matches
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//! two members of the context it names and another matches none.
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use mizan_core as mizan;
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use mizan_core::graph_check::verify_invariants;
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use mizan_core::prelude::*;
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use mizan_core::RequestHandle;
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use serde::{Deserialize, Serialize};
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#[derive(Mizan, Serialize, Deserialize, Debug, Clone)]
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pub struct Profile {
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pub user_id: i64,
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pub name: String,
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}
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#[derive(Mizan, Serialize, Deserialize, Debug, Clone)]
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pub struct Status {
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pub ok: bool,
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}
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#[mizan::context("user")]
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pub struct UserCtx;
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#[mizan::client(context = UserCtx)]
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pub async fn user_profile(_req: &RequestHandle<'_>, user_id: i64) -> Profile {
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Profile {
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user_id,
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name: format!("user-{user_id}"),
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}
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}
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/// Same output shape as `user_profile`.
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#[mizan::client(context = UserCtx)]
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pub async fn user_card(_req: &RequestHandle<'_>, user_id: i64) -> Profile {
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Profile {
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user_id,
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name: format!("card-{user_id}"),
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}
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}
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#[mizan::client(merge = UserCtx)]
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pub async fn rename_user(_req: &RequestHandle<'_>, user_id: i64, name: String) -> Profile {
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Profile { user_id, name }
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}
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/// No member of `user` returns this shape.
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#[mizan::client(merge = UserCtx)]
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pub async fn mark_seen(_req: &RequestHandle<'_>, user_id: i64) -> Status {
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Status { ok: user_id > 0 }
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}
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#[test]
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#[should_panic(expected = "Merge resolution needs exactly one match")]
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fn a_merge_matching_several_members_is_ambiguous() {
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verify_invariants();
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}
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#[test]
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#[should_panic(expected = "user_card")]
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fn an_ambiguous_merge_names_every_candidate_member() {
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verify_invariants();
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}
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#[test]
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#[should_panic(expected = "no member of that context has output type")]
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fn a_merge_matching_no_member_has_no_slot() {
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verify_invariants();
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}
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