mirror of
https://github.com/badlogic/pi-mono.git
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e9c0ff4d84
src/next is src (the main export), src/next-node is src/node with short subpaths (/http, /workers, /plugins, /plugins/runtime, /app, /surfaces, /web, /react, /tui, /tui/launcher); the foundations get /json and /watch; Chord v1 moves to src/old (/old, /old/node) until p2 runs on v2; tests and docs move likewise (test/, docs/, test/old, docs/old). Durable and env import the foundations from their subpaths.
84 lines
3.8 KiB
TypeScript
84 lines
3.8 KiB
TypeScript
// A transaction's table writes (slice 6a §6, §7): staging, and the `tx.get` overlay over committed rows.
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import { afterEach, describe, expect, it } from "vitest";
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import { BACKGROUND_CONTEXT as context } from "../../src/context/index.ts";
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import { int, opt, str } from "../../src/contracts/index.ts";
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import { add, eq, prefix } from "../../src/store/expression.ts";
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import type { StagedWrite } from "../../src/store/step.ts";
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import type { ChordStore } from "../../src/store/store.ts";
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import { defineTable } from "../../src/store/table.ts";
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import { TableChanges } from "../../src/store/table-changes.ts";
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import { memoryStore, rejection, tableIn } from "../support.ts";
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const Edits = defineTable("edits", {
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version: 1,
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columns: { id: str(), path: str(), hits: int({ default: 0 }), note: opt(str()) },
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key: ["id"],
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});
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const FENCE = { admit: () => true, adopt: () => {} };
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let store: ChordStore;
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afterEach(async () => {
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await store?.close(context);
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});
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/** Changes to a table holding `e1` (committed); the staged list they append to. */
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async function seeded(): Promise<{ readonly changes: TableChanges; readonly staged: StagedWrite[] }> {
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store = await memoryStore();
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const edits = await tableIn(store, Edits);
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const seed: StagedWrite[] = [];
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new TableChanges(edits, seed).put({ id: "e1", path: "a/1", hits: 1 });
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await store.commit(seed, FENCE, context);
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const staged: StagedWrite[] = [];
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return { changes: new TableChanges(edits, staged), staged };
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}
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describe("staging", () => {
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it("checks at the call, appends in order, and touches no backend before the commit", async () => {
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const { changes, staged } = await seeded();
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changes.put({ id: "e2", path: "a/2" });
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expect(() => changes.put({ id: "e3" })).toThrow('column "path" is missing');
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expect(() => changes.update({ id: "e1" }, { id: "x" })).toThrow("cannot change");
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changes.update({ id: "e1" }, { note: "n" });
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changes.delete({ id: "e9" });
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expect(staged).toHaveLength(3);
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expect(
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await store.read((executor) => executor.get(`SELECT count(*) AS n FROM "app.store:edits"`), context),
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).toEqual({ n: 1 });
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});
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});
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describe("the tx.get overlay", () => {
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it("replays the transaction's own put, update and delete over the committed row", async () => {
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const { changes } = await seeded();
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changes.update({ id: "e1" }, (e: { hits: never }) => ({ hits: add(e.hits, 2) }));
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expect(await changes.get({ id: "e1" }, context)).toEqual({ id: "e1", path: "a/1", hits: 3 });
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changes.update({ id: "e1" }, { note: "n" });
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expect(await changes.get({ id: "e1" }, context)).toEqual({ id: "e1", path: "a/1", hits: 3, note: "n" });
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changes.delete({ id: "e1" });
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expect(await changes.get({ id: "e1" }, context)).toBeUndefined();
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changes.put({ id: "e1", path: "b" });
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changes.update({ id: "e1" }, (e: { hits: never }) => ({ hits: add(e.hits, 1) }));
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expect(await changes.get({ id: "e1" }, context)).toEqual({ id: "e1", path: "b", hits: 1 });
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});
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it("an update of an absent key changes nothing", async () => {
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const { changes } = await seeded();
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changes.update({ id: "e9" }, { note: "n" });
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expect(await changes.get({ id: "e9" }, context)).toBeUndefined();
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});
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it("is refused on a table after an updateWhere or deleteWhere (W10); other tables are unaffected", async () => {
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const { changes } = await seeded();
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expect(await changes.get({ id: "e1" }, context)).toBeDefined();
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changes.updateWhere((e: { path: never }) => prefix(e.path, "a/"), { note: "bulk" });
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expect(await rejection(changes.get({ id: "e1" }, context))).toMatchObject({
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code: "invalid",
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reason: "read_after_bulk",
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});
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const other = new TableChanges(changes.handle, []);
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other.deleteWhere((e: { id: never }) => eq(e.id, "x"));
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expect(await rejection(other.get({ id: "e1" }, context))).toMatchObject({ reason: "read_after_bulk" });
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expect(await new TableChanges(changes.handle, []).get({ id: "e1" }, context)).toBeDefined();
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});
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});
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