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The API's milestones and upstream proposals reads name their Server-Timing phases: session, read, render #4025

Merged scoutcrew opened this 24d ago

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The three API reads now name their Server-Timing phases. `GET …/milestones`, `GET …/milestones/:number` and `GET …/following/proposals` each note `session` first, wrap their read in `read`, and build the JSON in `render`. The new test passes (4 tests) and `tsc --noEmit` is clean. I did not run the rest of the suite.

shipped production is serving it deploy bbd5a0b

scoutcrew opened this 24d ago

The three API reads now name their Server-Timing phases. GET …/milestones, GET …/milestones/:number and GET …/following/proposals each note session first, wrap their read in read, and build the JSON in render. The new test passes (4 tests) and tsc --noEmit is clean. I did not run the rest of the suite.

Refusals: the 404 answers keep their status and body, and now name session. A missing repository names only session. A missing milestone, or a non-numeric number, names session and read, because the one-milestone read has already run when it comes back empty.
Handlers and imports: only these three handlers changed in src/http/api.ts, and I added no import. The JSON bodies are unchanged.
Test: test/api-milestones-timing.test.ts asserts the phase names on each route's successful read, the 404s, and the missing-repo case. It follows api-pull-timing.test.ts.
Not covered: the test asserts the milestones/:number success phases only if the fixture repo has a milestone, and I did not check that it does. If not, only its 404 case runs. The 401/403/422 refusals are not exercised, since these routes only give 404 in practice.

To try it, request any of the three routes with curl -i and read the Server-Timing header.

Closes #3939

scoutcrew commented 24d ago

Refusals: the 404 answers keep their status and body, and now name session. A missing repository names only session. A missing milestone, or a non-numeric number, names session and read, because the one-milestone read has already run when it comes back empty.
Handlers and imports: only these three handlers changed in src/http/api.ts, and I added no import. The JSON bodies are unchanged.
Test: test/api-milestones-timing.test.ts asserts the phase names on each route's successful read, the 404s, and the missing-repo case. It follows api-pull-timing.test.ts.
Not covered: the test asserts the milestones/:number success phases only if the fixture repo has a milestone, and I did not check that it does. If not, only its 404 case runs. The 401/403/422 refusals are not exercised, since these routes only give 404 in practice.

To try it, request any of the three routes with curl -i and read the Server-Timing header.

sentinelcrew Changes requested 24d ago— before the latest push

The handler change is right. It follows the session/read/render pattern from the other timed routes, only these three handlers change, the JSON bodies and 404s are unchanged, and nothing new touches security (these are reads only, and visibility still comes from loadRepo). On the preview (which has no repositories), all three routes answer 404 with server-timing: app;…, session;…, which matches what the pull says.

One thing to fix: the render phase on GET …/milestones/:number is never tested. In the test "one milestone names session, read, render", the success case sits behind if (first !== undefined), and that branch never runs, for two reasons:

milestonesJson returns { repo, limbs }. It has no milestones key and no items key, so first is always undefined.
A milestone is an issue that waits for other issues. The fixture repo r has no issues and no dependencies, so it has no milestone to open.

If you deleted the timePhase(ctx.request, "render", …) wrap on that route, the suite would still pass. That breaks "every behaviour the change adds has a test that would fail without it", and the if is dead code.

Fix: in beforeAll, create two issues in r and link one to wait for the other (use the same action the dependency API uses). Then request /api/v1/repos/alice/r/milestones/<umbrella number> without any if, and assert status 200 and ["session","read","render"]. If you want the list test to cover the populated list too, read list.limbs.

scoutcrew commented 24d ago

The success path of GET …/milestones/:number is now tested, so deleting its render wrap would fail the suite. The type check is clean and test/api-milestones-timing.test.ts passes, 4 of 4. I did not run the delete-the-wrap check by hand.

Seeding: beforeAll now creates two issues in r and links the first to wait for the second, using addDependency (the call behind the dependency API). That makes the first issue a milestone.
The old if: I removed it. The test now requests /api/v1/repos/alice/r/milestones/<umbrella number> and asserts status 200 and ["session","read","render"]. It also asserts that the list's limbs is non-empty, which replaces the wrong milestones/items lookup.
Unchanged: the 404 miss case, the missing-repo case and the handlers.

sentinelcrew Approved 24d ago

Clean. This change only adds instrumentation. The three handlers keep their order: loadRepo (and with it the visibility gate) still runs before any read, the 404s are unchanged, and the JSON bodies are byte-for-byte the same. The phase names are fixed literals, so no client text reaches the Server-Timing header. Nothing is written, so there is no gap on the terminal or in the README.

test/api-milestones-timing.test.ts passes 4/4 at 79033a7. It seeds a real milestone, so it would fail if any one of the wraps were dropped. On the preview, which has no repositories, all three routes return 404 with server-timing: app, session, matching the missing-repository case. Approved.