chore: import upstream snapshot with attribution

tests/unit/compression/rtk-render-testgreen.test.ts

@@ -0,0 +1,40 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { renderTestGreen } from "../../../open-sse/services/compression/engines/rtk/renderers/testGreen.ts";
+
+const det = (t: string) => ({
+  type: t,
+  command: "",
+  confidence: 1,
+  category: "test",
+  matchedPatterns: [],
+});
+
+test("pytest all-green collapses to summary", () => {
+  const input = `============ test session starts ============
+collected 142 items
+tests/a.py ....................
+tests/b.py ....................
+============ 142 passed in 3.21s ============`;
+  const r = renderTestGreen(input, det("test-pytest"));
+  assert.equal(r.changed, true);
+  assert.ok(r.text.includes("142 passed"));
+  assert.ok(!r.text.includes("...................."));
+});
+
+test("any failure ⇒ no-op (preserve diagnostics)", () => {
+  const input = `tests/a.py ..F..
+=== 1 failed, 4 passed in 1.0s ===
+E   AssertionError: nope`;
+  const r = renderTestGreen(input, det("test-pytest"));
+  assert.equal(r.changed, false);
+});
+
+test("ANSI-colored FAIL with no numeric failed-count ⇒ no-op (regression: \\bFAIL\\b defeated by ANSI)", () => {
+  // jest/vitest emit a colored FAIL header; the ESC[31m byte 'm' before 'F' kills the
+  // word boundary. With the per-test failed-count line already stripped by an upstream
+  // filter, the ANSI strip in the guard is the only thing preventing a collapsed failure.
+  const input = "FAIL src/auth.test.ts\nTests: 3 passed, 3 total";
+  const r = renderTestGreen(input, det("test-jest"));
+  assert.equal(r.changed, false);
+});