mirror of
https://github.com/morluto/rea
synced 2026-10-26 14:25:49 -04:00
Wade
d8199ab6af
The __vite__mapDeps table indexer mapped a spread element to one unknown slot, so every later entry kept a definite index even though the spread can add any number of elements. A call such as __vite__mapDeps([0, 2]) over ["./first.js", ...["./middle-a.js", "./middle-b.js"], "./last.js"] then resolved index 2 to last.js instead of middle-b.js. Keep only the entries before the first spread; indexes from the spread onward stay unknown.
102 lines
3.4 KiB
TypeScript
102 lines
3.4 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import { analyzeJavaScriptStaticSource } from "./javascriptStaticAnalysis.js";
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describe("Vite preload dependency recovery", () => {
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it("decodes helper table values and preserves sparse and dynamic slots", () => {
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const source = String.raw`
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const __vite__mapDeps = (indexes, map = __vite__mapDeps, dependencies =
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(map.f || (map.f = ["./caf\u00e9.js", , getDependency(), "./last.js"]))) =>
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indexes.map((index) => dependencies[index]);
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const dynamicIndex = chooseIndex();
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__vite__mapDeps([0, , 3, dynamicIndex]);
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`;
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const analysis = analyzeJavaScriptStaticSource(source);
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const references = analysis.references.filter(
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({ kind }) => kind === "dynamic-import",
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);
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expect(references.map(({ specifier }) => specifier).sort()).toEqual([
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"./café.js",
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"./last.js",
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null,
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]);
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expect(references.every(({ location }) => location.start.line === 6)).toBe(
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true,
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);
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expect(references.filter(({ specifier }) => specifier === null)).toEqual([
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expect.objectContaining({
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expression: expect.stringContaining(
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"__vite__mapDeps([0, , 3, dynamicIndex])",
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),
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}),
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]);
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});
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it("does not take dependency strings from comments or unrelated helpers", () => {
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const analysis = analyzeJavaScriptStaticSource(`
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// cache.f = ["./comment.js"]
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const unrelated = (cache) => cache.f || (cache.f = ["./unrelated.js"]);
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__vite__mapDeps([0]);
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`);
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expect(
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analysis.references.filter(({ kind }) => kind === "dynamic-import"),
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).toEqual([]);
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});
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it("keeps cache escapes and explicit cache overrides unknown", () => {
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const helper = `
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const __vite__mapDeps = (indexes, map = __vite__mapDeps, dependencies =
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(map.f || (map.f = ["./original.js"]))) =>
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indexes.map((index) => dependencies[index]);
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`;
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const escaped = analyzeJavaScriptStaticSource(`
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${helper}
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const dependencies = __vite__mapDeps.f;
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dependencies[0] = "./changed.js";
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__vite__mapDeps([0]);
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`);
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expect(
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escaped.references
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.filter(({ kind }) => kind === "dynamic-import")
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.map(({ specifier }) => specifier),
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).toEqual([null]);
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const overridden = analyzeJavaScriptStaticSource(`
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${helper}
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__vite__mapDeps([0], customMap);
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`);
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expect(
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overridden.references
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.filter(({ kind }) => kind === "dynamic-import")
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.map(({ specifier }) => specifier),
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).toEqual([null]);
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const defaulted = analyzeJavaScriptStaticSource(`
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${helper}
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__vite__mapDeps([0], undefined, void 0);
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`);
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expect(
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defaulted.references
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.filter(({ kind }) => kind === "dynamic-import")
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.map(({ specifier }) => specifier),
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).toEqual(["./original.js"]);
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});
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it("keeps table slots from a spread onward unknown", () => {
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const analysis = analyzeJavaScriptStaticSource(`
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const __vite__mapDeps = (indexes, map = __vite__mapDeps, dependencies =
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(map.f || (map.f = ["./first.js", ...["./middle-a.js", "./middle-b.js"], "./last.js"]))) =>
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indexes.map((index) => dependencies[index]);
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__vite__mapDeps([0, 2]);
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`);
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expect(
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analysis.references
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.filter(({ kind }) => kind === "dynamic-import")
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.map(({ specifier }) => specifier),
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).toEqual(["./first.js", null]);
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});
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});
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