# Test recipes

GROWS every migration. How to characterize and verify a modal. Consistent with the
project `testing-conventions` skill: test user-observable behavior, assert DB state
directly, don't test the means.

## The three test layers

1. **Characterization e2e first (Playwright).** Before changing a modal, write/confirm a
   spec capturing *current* behavior — focus/caret survival across swaps, each field
   round-trip, validation errors, the real save. This is the parity contract; keep it
   green through every commit.
2. **Pure-function checks via REPL.** Once render/data-prep fns are pure, exercise them
   with `clojure-eval` / `clj-nrepl-eval -p <port>`. Assert on returned data; for markup
   use string matches (`(re-find #"accounts\[0\]\[account\]" (str html))`) — this style
   survives the Selmer switch. Avoid brittle structural assertions.
3. **DB-state assertions for mutations.** If a submit writes Datomic, verify by querying
   the DB, not by asserting on markup.

## Running e2e

```bash
npx playwright test                              # full suite
npx playwright test e2e/transaction-edit-swap.spec.ts   # one spec
```
- Config: `playwright.config.ts`, `baseURL http://localhost:3333`, `webServer:
  lein run -m auto-ap.test-server`, `reuseExistingServer: !CI`.
- **The server must be from the worktree you're testing.** `reuseExistingServer` will
  silently reuse *any* server on `:3333` — including another worktree's. Confirm with
  `ls -la /proc/$(lsof -ti :3333)/cwd` (or restart on a clean port) before trusting a run.
- The test-server port is hardcoded (`test_server.clj` `run-jetty {:port 3333}`); to run a
  second server from another worktree, change that or parameterise it.

## Driving a typeahead in e2e (Solr unavailable in tests)

```js
await typeahead.locator('a[x-ref="input"]').click();      // open tippy dropdown
const search = page.locator('[data-tippy-root] input[x-model="search"]').first();
await search.fill('te');                                  // under 3-char Solr threshold
await typeahead.evaluate((el, id) => {                     // inject a clickable result
  window.Alpine.$data(el).elements = [{ value: id, label: 'Test Account' }];
}, accountId);
await page.locator('[data-tippy-root] a', { hasText: 'Test Account' }).first().click();
```
Entity ids come from `GET /test-info` (`{accounts:{test-account, vendor, vendor2, ...}}`).

## Proving the focus invariant (caret survival) — the key swap test

```js
// before the debounced swap lands, capture the live focused node...
await page.evaluate(() => { window.__focused = document.activeElement; });
await swap;                                       // waitForResponse on the *-form-changed POST
const ok = await page.evaluate(() => {
  const a = document.activeElement;
  return { sameNode: a === window.__focused, value: a?.value, caret: a?.selectionStart };
});
// ...assert the SAME node survived with value + caret intact.
```
`trackErrors(page)` (collect `pageerror` + `console.error`, assert `[]`) catches a swap
that throws on a stale `$refs`/`tippy` — pair it with every swap test.

## Asserting "no request" (Rule 1 fields)

```js
let posts = 0;
page.on('request', r => { if (r.url().includes('edit-form-changed') && r.method()==='POST') posts++; });
// ...type in the memo...
expect(posts).toBe(0);   // memo affects nothing → issues no request
```

---

## E2E baseline (the regression gate — never drop below this)

The full suite must stay green after every migration. Specs touching the migrated modals:

| Spec | Tests | Role |
|------|-------|------|
| `e2e/transaction-edit-swap.spec.ts` | 8 | **Phase 2 parity contract** — whole-form `hx-select` swaps, caret survival, no-request memo, vendor re-select |
| `e2e/transaction-edit.spec.ts` | 15 | transaction edit behavior |
| `e2e/bulk-code-transactions.spec.ts` | 18 | Phase 3 (bulk code) |
| `e2e/transaction-import.spec.ts` | 4 | import |
| `e2e/transaction-navigation.spec.ts` | 13 | navigation |

### Running e2e from a non-default worktree (recipe)

`:3333` is often taken by another worktree's server. To run this worktree's code:

1. Boot the test server in-process on this worktree's REPL at an alternate port — no
   second JVM, and it live-reloads as you edit:
   ```clojure
   (require '[auto-ap.test-server :as ts] '[ring.adapter.jetty :refer [run-jetty]]
            '[datomic.api :as dc])
   ;; reseed helper — call before each full run so state doesn't leak between runs
   (defn reseed! []
     (try (.stop (:server test-srv)) (catch Throwable _))
     (try (dc/delete-database "datomic:mem://playwright-test") (catch Throwable _))
     (def test-srv (let [c (ts/create-test-db) id (ts/seed-test-data c)]
                     (reset! ts/test-transaction-id id)
                     {:server (run-jetty (ts/test-app) {:port 3334 :join? false}) :tx-id id})))
   (reseed!)
   ```
2. `playwright.config.ts` honors `BASE_URL`; setting it also disables the auto-started
   webServer (so worktrees don't fight over :3333):
   ```bash
   BASE_URL=http://localhost:3334 npx playwright test --workers=1 --reporter=line
   ```
3. **Reseed (`reseed!`) before each full run.** One long-lived in-process server persists
   its in-mem DB across separate `npx playwright` invocations; the swap spec's
   `clearAccounts`/save mutate the shared transaction and leak into later specs. The
   normal harness avoids this by booting a fresh server per `npx playwright test`.

### Pass/fail baseline — measured on the merged hx-select reference (Phase 2 start)

Server: in-process from `integreat-execute-refactor` on `:3334`, `--workers=1`, fresh seed.

| Spec | Result |
|------|--------|
| `transaction-edit-swap.spec.ts` | **6 / 6 pass** — the whole-form swap parity contract |
| `transaction-edit.spec.ts` | **1 fail (masks 7 via `mode: 'serial'`)** — `Shared Location … spread on save and reopen` fails: the save POST returns a validation error (amount/balance test-data assumption: "$200 = full amount of the 2nd transaction" doesn't hold), so the modal stays open. **Pre-existing on the merged reference, not introduced by this work.** |
| Full suite (39) | **30 pass / 2 fail / 7 skipped.** 2nd failure: `transaction-navigation.spec.ts` date-range persistence (`date-range=all` expected, got `month`) — drift from the base branch's "require Apply for date-range filters" change, unrelated to forms. |

**Gate for the Transaction Edit refactor:** the 6/6 swap-doctrine spec + REPL pure-fn
checks. The `transaction-edit.spec.ts` `Shared Location` failure must be understood/fixed
to unmask the other 7 before that file can serve as a full parity gate — it is **not**
a regression to introduce, but it does cap the available characterization coverage today.
Never drop below 30 passing on the full suite.