import { test } from "node:test";
import assert from "node:assert/strict";
import { counted, reportOn } from "../src/suite.ts";

// The totals come from the runner's own summary, and from nothing else.
test("the runner's totals are read from its summary", () => {
  const said = counted("✔ something (1ms)\nℹ tests 22\nℹ pass 22\nℹ fail 0\n");
  assert.deepEqual(said, { passed: 22, failed: 0 });
});

// A test *named* like a total must not be mistaken for one. The summary is a line of its own, and
// the pattern says so — otherwise a test called "pass 3" would rewrite the record.
test("a test named like a total is not a total", () => {
  const said = counted("✔ a machine reports pass 3 things (1ms)\nℹ pass 22\nℹ fail 0\n");
  assert.equal(said.passed, 22, "a test name was read as the total");
});

// A failing run is read as a failing run.
test("failures are read", () => {
  const said = counted("ℹ pass 21\nℹ fail 1\n");
  assert.deepEqual(said, { passed: 21, failed: 1 });
});

// **No totals is not zero failures.** A run whose result could not be read is a run nobody can say
// anything about, and writing "0 failed" because nothing said otherwise is how a green record
// comes to mean nothing — which is the whole of 04-ISSUES/005.
test("output with no summary yields no totals rather than a clean bill", () => {
  const said = counted("the runner crashed before it said anything\n");
  assert.equal(said.passed, null);
  assert.equal(said.failed, null);
});

// No receipt rather than a guessed one.
//
// The rule that keeps the record meaning something, and it was first written where nothing could
// check it — 04-ISSUES/005 in miniature, inside the fix for it.
test("a run whose result could not be read writes nothing", () => {
  let wrote = false;
  const said = reportOn({ passed: null, failed: null }, () => {
    wrote = true;
    return { against: {}, ran: [] };
  });
  assert.equal(wrote, false, "a receipt was written for a run nobody could read");
  assert.match(said, /no receipt written/);
});

test("a run that was read is recorded, with what it was read against", () => {
  let got: [number, number] | null = null;
  const said = reportOn({ passed: 22, failed: 0 }, (p, f) => {
    got = [p, f];
    return { against: { "mesh-lab": "abc1234" }, ran: ["test/integration/mesh.test.ts"] };
  });
  assert.deepEqual(got, [22, 0]);
  assert.match(said, /mesh\.test\.ts — 22 passed, 0 failed, against mesh-lab abc1234/);
});

// The runner's real output, colours and all.
//
// Captured from `node --test` writing into a pipe rather than written by hand: the first version of
// counted() passed every test and read nothing, because the fixtures were clean text and the runner
// emits escape codes. A fixture that agrees with the mistake proves the mistake.
test("the runner's totals are read from output as it actually arrives", () => {
  const real = "\u001b[34m\u2139 suites 0\u001b[39m\n" +
    "\u001b[34m\u2139 pass 22\u001b[39m\n" +
    "\u001b[34m\u2139 fail 0\u001b[39m\n" +
    "\u001b[34m\u2139 duration_ms 98.9\u001b[39m\n";
  assert.deepEqual(counted(real), { passed: 22, failed: 0 });
});