61 lines
2.7 KiB
TypeScript
61 lines
2.7 KiB
TypeScript
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import { join } from "node:path";
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import { expect, it } from "vitest";
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import { estimateJavaScriptStaticApplicationProjection } from "../../../src/domain/javascript/javascriptApplicationProjectionResources.js";
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import { analyzeJavaScriptStaticSource } from "../../../src/domain/javascript/javascriptStaticAnalysis.js";
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import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
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import {
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reconstructJavaScriptFixture,
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writeFixtureFiles,
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} from "../../support/javascriptApplicationFixture.js";
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const BACKSLASH = String.fromCharCode(92);
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// A bundle chunk made of many small functions, each with storage and request
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// findings, as minified application chunks commonly are. The key suffix lets
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// a case use literals that expand when serialized as JSON.
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const chunk = (functions: number, keySuffix = ""): string =>
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Array.from(
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{ length: functions },
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(_, index) =>
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`export function f${String(index)}(a){` +
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`localStorage.setItem("pref.${String(index % 5)}${keySuffix}",String(a));` +
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`const d=localStorage.getItem("pref.${String(index % 5)}${keySuffix}");` +
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`return fetch("/rpc/p${String(index % 7)}",{method:"POST",body:d});}`,
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).join("\n");
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it.each([
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{ name: "short path, plain literals", directory: "", keySuffix: "" },
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{
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// Quotes, backslashes and a control character escape in JSON; the
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// non-ASCII text takes several UTF-8 bytes; the nested path repeats in
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// every projected record.
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name: "nested path, escaped and multibyte literals",
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directory: "nested-directory/".repeat(8),
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keySuffix: `.${BACKSLASH}"q${BACKSLASH}"${BACKSLASH}${BACKSLASH}${BACKSLASH}t.é中😀`,
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},
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])(
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"charges a bounded multiple of the application relationships it admits: $name",
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async ({ directory, keySuffix }) => {
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const text = chunk(400, keySuffix);
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const sourcePath = `${directory}chunk.js`;
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const root = await createTestTempDirectory("rea-projection-estimate-");
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await writeFixtureFiles(root, { [`assets/${sourcePath}`]: text });
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const result = await reconstructJavaScriptFixture(join(root, "assets"));
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const facts = analyzeJavaScriptStaticSource(text);
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const checkpointBytes = Buffer.byteLength(JSON.stringify(facts));
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const estimate = estimateJavaScriptStaticApplicationProjection(
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facts,
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checkpointBytes,
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sourcePath,
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);
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const serialized = Buffer.byteLength(JSON.stringify(result.graph));
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expect(facts.storage.length).toBeGreaterThanOrEqual(800);
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// Parsed JSON retains a few times its bytes. A charge far above that makes
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// the shared parent budget refuse later sources that would fit.
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expect(estimate).toBeGreaterThanOrEqual(3 * serialized);
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expect(estimate).toBeLessThanOrEqual(8 * serialized);
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},
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);
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