test(triage): add end-to-end integration test with mocked deps

tests/unit/feature-triage/integration.test.mjs

@@ -0,0 +1,162 @@
+import { describe, it } from "node:test";
+import assert from "node:assert/strict";
+import { tmpdir } from "node:os";
+import { mkdirSync, mkdtempSync, rmSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import { main } from "../../../scripts/features/feature-triage.mjs";
+
+function makeDeps(state) {
+  return {
+    ghIssueListNumbers: () => state.openIssues.map((i) => i.number),
+    ghIssueListFeatureTitled: () => [],
+    ghIssueView: (_o, _r, n) => state.issuesById[n],
+    ghPrSearchMerged: (_o, _r, n) => state.prsByIssue[n] ?? [],
+    gitTagsByDate: () => state.tags ?? [],
+    gitLogGrep: (pattern) => state.commitsByPattern?.[pattern] ?? [],
+    gitIsAncestor: () => true,
+    gitCurrentReleaseBranch: () => state.releaseBranch ?? null,
+  };
+}
+
+function captureExit() {
+  const orig = process.exit;
+  let code = null;
+  process.exit = (c) => {
+    code = c;
+    throw new Error("__EXIT__");
+  };
+  return {
+    code: () => code,
+    restore: () => {
+      process.exit = orig;
+    },
+  };
+}
+
+describe("feature-triage integration", () => {
+  it("classifies 5 mixed issues into expected buckets", async () => {
+    const tmp = mkdtempSync(join(tmpdir(), "triage-"));
+    mkdirSync(join(tmp, "viable", "need_details"), { recursive: true });
+    mkdirSync(join(tmp, "defer"), { recursive: true });
+
+    const now = new Date();
+    const day = (n) => new Date(now.getTime() - n * 86400_000).toISOString();
+
+    const state = {
+      openIssues: [
+        { number: 100 },
+        { number: 200 },
+        { number: 300 },
+        { number: 400 },
+        { number: 500 },
+      ],
+      issuesById: {
+        100: {
+          number: 100,
+          title: "fresh",
+          url: "u",
+          author: { login: "a" },
+          createdAt: day(3),
+          labels: [],
+          assignees: [],
+          comments: [],
+          reactionGroups: [],
+          timelineItems: [],
+        },
+        200: {
+          number: 200,
+          title: "ripe",
+          url: "u",
+          author: { login: "b" },
+          createdAt: day(20),
+          labels: [],
+          assignees: [],
+          comments: [],
+          reactionGroups: [],
+          timelineItems: [],
+        },
+        300: {
+          number: 300,
+          title: "shipped",
+          url: "u",
+          author: { login: "c" },
+          createdAt: day(40),
+          labels: [],
+          assignees: [],
+          comments: [],
+          reactionGroups: [],
+          timelineItems: [],
+        },
+        400: {
+          number: 400,
+          title: "delegated",
+          url: "u",
+          author: { login: "d" },
+          createdAt: day(40),
+          labels: [],
+          assignees: [{ login: "alice" }],
+          comments: [],
+          reactionGroups: [],
+          timelineItems: [],
+        },
+        500: {
+          number: 500,
+          title: "in PR",
+          url: "u",
+          author: { login: "e" },
+          createdAt: day(40),
+          labels: [],
+          assignees: [],
+          comments: [],
+          reactionGroups: [],
+          timelineItems: [
+            {
+              __typename: "CrossReferencedEvent",
+              source: { __typename: "PullRequest", state: "OPEN", number: 999 },
+            },
+          ],
+        },
+      },
+      prsByIssue: {
+        300: [
+          {
+            number: 1000,
+            title: "feat: shipped (closes #300)",
+            body: "closes #300",
+            mergedAt: day(10),
+            mergeCommit: { oid: "abc" },
+          },
+        ],
+      },
+      tags: [{ date: new Date(now.getTime() - 5 * 86400_000), name: "v3.7.2" }],
+      releaseBranch: "release/v3.8.0",
+    };
+
+    const deps = makeDeps(state);
+    const outPath = join(tmp, "_triage.json");
+
+    const exit = captureExit();
+    try {
+      await main(
+        ["--owner", "x", "--repo", "y", "--ideia-dir", tmp, "--output", outPath],
+        {},
+        deps
+      ).catch((e) => {
+        if (e.message !== "__EXIT__") throw e;
+      });
+    } finally {
+      exit.restore();
+    }
+
+    assert.equal(exit.code(), 0);
+    const out = JSON.parse(readFileSync(outPath, "utf8"));
+    assert.equal(out.counts.dormant, 1);
+    assert.equal(out.counts.absorb, 1);
+    assert.equal(out.counts.already_delivered, 1);
+    assert.equal(out.counts.skip_assigned, 1);
+    assert.equal(out.counts.skip_has_pr, 1);
+    assert.equal(out.buckets.already_delivered[0].version, "v3.7.2");
+
+    rmSync(tmp, { recursive: true, force: true });
+  });
+});