chore: import upstream snapshot with attribution

apps/supervisor/src/env.test.ts

@@ -0,0 +1,64 @@
+import { describe, it, expect, vi } from "vitest";
+
+// Mock std-env before importing env.ts so the module-level `Env.parse(stdEnv)`
+// doesn't fail in a test environment that lacks required vars.
+vi.mock("std-env", () => ({
+  env: {
+    TRIGGER_API_URL: "http://localhost:3030",
+    TRIGGER_WORKER_TOKEN: "test-token",
+    MANAGED_WORKER_SECRET: "test-secret",
+    OTEL_EXPORTER_OTLP_ENDPOINT: "http://localhost:4318",
+  },
+}));
+
+const { Env } = await import("./env.js");
+
+// Minimal env that satisfies all required fields; everything else has defaults.
+const base = {
+  TRIGGER_API_URL: "http://localhost:3030",
+  TRIGGER_WORKER_TOKEN: "test-token",
+  MANAGED_WORKER_SECRET: "test-secret",
+  OTEL_EXPORTER_OTLP_ENDPOINT: "http://localhost:4318",
+};
+
+describe("Env superRefine - backpressure source awareness", () => {
+  it("pod-count source can be enabled without a Redis host", () => {
+    expect(() =>
+      Env.parse({
+        ...base,
+        TRIGGER_DEQUEUE_BACKPRESSURE_POD_COUNT_ENABLED: "true",
+      })
+    ).not.toThrow();
+  });
+
+  it("redis source requires a Redis host", () => {
+    expect(() =>
+      Env.parse({
+        ...base,
+        TRIGGER_DEQUEUE_BACKPRESSURE_ENABLED: "true",
+      })
+    ).toThrow();
+  });
+
+  it("both sources can be enabled together (with a Redis host)", () => {
+    expect(() =>
+      Env.parse({
+        ...base,
+        TRIGGER_DEQUEUE_BACKPRESSURE_ENABLED: "true",
+        TRIGGER_DEQUEUE_BACKPRESSURE_REDIS_HOST: "localhost",
+        TRIGGER_DEQUEUE_BACKPRESSURE_POD_COUNT_ENABLED: "true",
+      })
+    ).not.toThrow();
+  });
+
+  it("rejects pod-count release >= engage when the source is enabled", () => {
+    expect(() =>
+      Env.parse({
+        ...base,
+        TRIGGER_DEQUEUE_BACKPRESSURE_POD_COUNT_ENABLED: "true",
+        TRIGGER_DEQUEUE_BACKPRESSURE_POD_COUNT_ENGAGE: "100",
+        TRIGGER_DEQUEUE_BACKPRESSURE_POD_COUNT_RELEASE: "100",
+      })
+    ).toThrow();
+  });
+});