chore(template): clean-slate template snapshot from bb4a0c7
Curated, product-agnostic snapshot of the post-story-04 tree: demo content deleted, auth-only reference feature, web-next shell, all gates green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor library traces, and product naming are curated out; generic template repairs (coverage provider devDeps, root test:coverage script, live lint fixes, root-only release-please) are kept. See TEMPLATE.md for provenance, curation list, and usage. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK
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174
scripts/coverage/aggregate.test.mjs
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174
scripts/coverage/aggregate.test.mjs
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import { test, describe } from "node:test";
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import assert from "node:assert/strict";
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import fs from "node:fs";
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import path from "node:path";
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import os from "node:os";
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import { fileURLToPath } from "node:url";
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import {
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discoverLcovs,
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normalizeLcov,
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summarizeLcov,
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aggregate,
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} from "./aggregate.mjs";
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const __dirname = path.dirname(fileURLToPath(import.meta.url));
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const FIXTURES = path.join(__dirname, "__fixtures__");
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const pkgA = fs.readFileSync(
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path.join(FIXTURES, "aggregate-pkg-a.lcov"),
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"utf8",
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);
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const pkgB = fs.readFileSync(
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path.join(FIXTURES, "aggregate-pkg-b.lcov"),
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"utf8",
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);
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describe("normalizeLcov", () => {
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test("prefixes packageDir onto each SF line", () => {
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const result = normalizeLcov(pkgA, "packages/auth");
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assert.ok(result.includes("SF:packages/auth/src/foo.ts"));
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assert.ok(result.includes("SF:packages/auth/src/bar.ts"));
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assert.ok(!result.includes("SF:src/foo.ts\n")); // no unprefixed paths remain
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});
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test("leaves absolute paths untouched", () => {
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const text = "SF:/absolute/path/foo.ts\nDA:1,5\nend_of_record";
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const result = normalizeLcov(text, "packages/auth");
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assert.ok(result.includes("SF:/absolute/path/foo.ts"));
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});
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test("doesn't double-prefix when already prefixed", () => {
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const text = "SF:packages/auth/src/foo.ts\nDA:1,5\nend_of_record";
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const result = normalizeLcov(text, "packages/auth");
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assert.ok(result.includes("SF:packages/auth/src/foo.ts"));
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assert.ok(!result.includes("SF:packages/auth/packages/auth/"));
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});
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test("preserves non-SF lines verbatim", () => {
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const result = normalizeLcov(pkgA, "packages/auth");
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assert.ok(result.includes("DA:1,5"));
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assert.ok(result.includes("LH:2"));
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assert.ok(result.includes("end_of_record"));
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});
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});
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describe("summarizeLcov", () => {
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test("computes percentages from LF/LH/BRF/BRH/FNF/FNH summary records", () => {
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const summary = summarizeLcov(pkgA);
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// LF=3+2=5, LH=2+2=4 -> 80% statements/lines
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assert.equal(summary.statements, 80);
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assert.equal(summary.lines, 80);
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// BRF=2+0=2, BRH=1+0=1 -> 50% branches
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assert.equal(summary.branches, 50);
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// FNF=1+1=2, FNH=1+1=2 -> 100% functions
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assert.equal(summary.functions, 100);
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});
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test("treats zero-found as 100% (avoids division by zero)", () => {
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const text =
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"SF:src/x.ts\nLF:0\nLH:0\nBRF:0\nBRH:0\nFNF:0\nFNH:0\nend_of_record";
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const summary = summarizeLcov(text);
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assert.equal(summary.statements, 100);
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assert.equal(summary.branches, 100);
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assert.equal(summary.functions, 100);
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});
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test("rounds percentages to 2 decimals", () => {
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// LF=3, LH=2 -> 66.67%
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const text = "SF:x\nLF:3\nLH:2\nend_of_record";
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const summary = summarizeLcov(text);
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assert.equal(summary.statements, 66.67);
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});
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});
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describe("aggregate", () => {
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test("returns null summary when no lcovs are found", () => {
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const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), "cov-agg-empty-"));
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try {
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const result = aggregate(tmpRoot);
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assert.equal(result.summary, null);
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assert.equal(result.lcovs.length, 0);
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} finally {
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fs.rmSync(tmpRoot, { recursive: true, force: true });
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}
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});
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test("merges multiple lcovs and emits per-package summary", () => {
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const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), "cov-agg-merge-"));
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try {
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// Create packages/pkg-a + packages/pkg-b with their lcovs
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fs.mkdirSync(path.join(tmpRoot, "packages", "pkg-a", "coverage"), {
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recursive: true,
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});
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fs.mkdirSync(path.join(tmpRoot, "packages", "pkg-b", "coverage"), {
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recursive: true,
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});
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fs.writeFileSync(
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path.join(tmpRoot, "packages", "pkg-a", "coverage", "lcov.info"),
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pkgA,
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);
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fs.writeFileSync(
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path.join(tmpRoot, "packages", "pkg-b", "coverage", "lcov.info"),
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pkgB,
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);
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// Synthetic package.json for name resolution
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fs.writeFileSync(
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path.join(tmpRoot, "packages", "pkg-a", "package.json"),
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JSON.stringify({ name: "@repo/pkg-a" }),
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);
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fs.writeFileSync(
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path.join(tmpRoot, "packages", "pkg-b", "package.json"),
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JSON.stringify({ name: "@repo/pkg-b" }),
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);
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const result = aggregate(tmpRoot, { now: "2026-05-13T00:00:00Z" });
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assert.equal(result.lcovs.length, 2);
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assert.ok(result.mergedLcov.includes("SF:packages/pkg-a/src/foo.ts"));
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assert.ok(result.mergedLcov.includes("SF:packages/pkg-b/src/baz.ts"));
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// Per-package summaries
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assert.ok(result.summary.byPackage["@repo/pkg-a"]);
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assert.ok(result.summary.byPackage["@repo/pkg-b"]);
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assert.equal(result.summary.byPackage["@repo/pkg-a"].statements, 80);
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assert.equal(result.summary.byPackage["@repo/pkg-b"].statements, 75);
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// Repo-level summary: lines hit 4+3=7 of 5+4=9 -> 77.78%
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assert.equal(result.summary.repo.statements, 77.78);
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assert.equal(result.summary.generatedAt, "2026-05-13T00:00:00Z");
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} finally {
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fs.rmSync(tmpRoot, { recursive: true, force: true });
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}
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});
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});
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describe("discoverLcovs", () => {
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test("finds lcovs under packages/* and apps/*", () => {
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const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), "cov-discover-"));
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try {
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fs.mkdirSync(path.join(tmpRoot, "packages", "p1", "coverage"), {
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recursive: true,
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});
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fs.mkdirSync(path.join(tmpRoot, "apps", "a1", "coverage"), {
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recursive: true,
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});
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// p2 has no coverage dir
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fs.mkdirSync(path.join(tmpRoot, "packages", "p2"), { recursive: true });
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fs.writeFileSync(
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path.join(tmpRoot, "packages", "p1", "coverage", "lcov.info"),
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"",
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);
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fs.writeFileSync(
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path.join(tmpRoot, "apps", "a1", "coverage", "lcov.info"),
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"",
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);
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const found = discoverLcovs(tmpRoot);
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assert.equal(found.length, 2);
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const dirs = found.map((f) => f.packageDir).sort();
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assert.deepEqual(dirs, ["apps/a1", "packages/p1"]);
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} finally {
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fs.rmSync(tmpRoot, { recursive: true, force: true });
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}
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});
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});
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