t3-code-android-nightly/.repos/alchemy-effect/packages/alchemy/test/AWS/ElastiCache/Bindings.test.ts

import * as AWS from "@/AWS";
import * as Core from "@/Test/Core";
import * as Test from "@/Test/Alchemy";
import * as eventbridge from "@distilled.cloud/aws/eventbridge";
import { describe, expect } from "alchemy-test";
import * as Effect from "effect/Effect";
import * as Schedule from "effect/Schedule";
import * as HttpClient from "effect/http/HttpClient";
import ElastiCacheBindingsTestFunctionLive, {
  ElastiCacheBindingsTestFunction,
} from "./bindings-handler.ts";

const testOptions = { providers: AWS.providers() };
const { test, beforeAll, afterAll } = Test.make(testOptions);
const sharedStack = Core.scratchStack(testOptions, "ElastiCacheBindings");

const NONEXISTENT_NAME = "alchemy-elasticache-nonexistent-probe";

// Lambda function URL cold-start (DNS, IAM propagation, init) can take well
// over 60s on a fresh deploy.
const readinessPolicy = Schedule.max([
  Schedule.fixed("2 seconds"),
  Schedule.recurs(75),
]);

let baseUrl: string;
let functionArn: string;

const getJson = (path: string) =>
  HttpClient.get(`${baseUrl}${path}`).pipe(
    Effect.flatMap((response) =>
      response.status >= 500
        ? Effect.fail(new Error(`transient upstream ${response.status}`))
        : Effect.succeed(response),
    ),
    Effect.retry({
      schedule: Schedule.max([
        Schedule.exponential("500 millis"),
        Schedule.recurs(6),
      ]),
    }),
    Effect.flatMap((r) => r.json),
  );

describe.sequential(
  "ElastiCache Bindings",
  {
    tags: [
      "provider:aws",
      "provider:aws:elasticache",
      "provider:aws:lambda",
      "live",
    ],
  },
  () => {
    beforeAll(
      Effect.gen(function* () {
        yield* Effect.logInfo(
          "ElastiCache bindings setup: destroying previous resources",
        );
        yield* sharedStack.destroy();

        yield* Effect.logInfo("ElastiCache bindings setup: deploying fixture");
        const attrs = yield* sharedStack.deploy(
          Effect.gen(function* () {
            return yield* ElastiCacheBindingsTestFunction;
          }).pipe(Effect.provide(ElastiCacheBindingsTestFunctionLive)),
        );

        expect(attrs.functionUrl).toBeTruthy();
        baseUrl = attrs.functionUrl!.replace(/\/+$/, "");
        functionArn = attrs.functionArn;

        const readinessUrl = `${baseUrl}/bindings`;
        yield* HttpClient.get(readinessUrl).pipe(
          Effect.flatMap((response) =>
            response.status === 200
              ? Effect.succeed(response)
              : Effect.fail(
                  new Error(`Function not ready: ${response.status}`),
                ),
          ),
          Effect.retry({ schedule: readinessPolicy }),
        );
      }),
      { timeout: 240_000 },
    );

    afterAll(sharedStack.destroy(), { timeout: 120_000 });

    describe("binding registration", () => {
      test.provider("all six capabilities initialize in the runtime", () =>
        Effect.gen(function* () {
          const response = yield* getJson("/bindings");
          expect((response as any).bound).toHaveLength(6);
        }),
      );
    });

    describe("DescribeServerlessCaches", () => {
      test.provider("lists the account's serverless caches", () =>
        Effect.gen(function* () {
          const response = yield* getJson("/caches");
          expect((response as any).count).toBeGreaterThanOrEqual(0);
        }),
      );

      test.provider("surfaces the typed not-found tag", () =>
        Effect.gen(function* () {
          const response = yield* getJson(
            `/cache-probe?name=${NONEXISTENT_NAME}`,
          );
          expect((response as any).tag).toBe("ServerlessCacheNotFoundFault");
        }),
      );
    });

    describe("DescribeServerlessCacheSnapshots", () => {
      test.provider("lists the account's snapshots", () =>
        Effect.gen(function* () {
          const response = yield* getJson("/snapshots");
          expect((response as any).count).toBeGreaterThanOrEqual(0);
        }),
      );
    });

    describe("DescribeEvents", () => {
      test.provider("lists recent serverless-cache events", () =>
        Effect.gen(function* () {
          const response = yield* getJson("/events");
          expect((response as any).count).toBeGreaterThanOrEqual(0);
        }),
      );
    });

    describe("DeleteServerlessCacheSnapshot", () => {
      test.provider("surfaces the typed not-found tag", () =>
        Effect.gen(function* () {
          const response = yield* getJson(
            `/delete-probe?name=${NONEXISTENT_NAME}`,
          );
          // ServiceLinkedRoleNotFoundFault: ElastiCache validates the SLR
          // before snapshot existence in accounts that never kept a cache.
          expect([
            "ServerlessCacheSnapshotNotFoundFault",
            "ServiceLinkedRoleNotFoundFault",
          ]).toContain((response as any).tag);
        }),
      );
    });

    describe("CopyServerlessCacheSnapshot", () => {
      test.provider(
        "rejects a nonexistent source snapshot with a typed tag",
        () =>
          Effect.gen(function* () {
            const response = yield* getJson(
              `/copy-probe?name=${NONEXISTENT_NAME}`,
            );
            expect([
              "ServerlessCacheSnapshotNotFoundFault",
              "InvalidParameterValueException",
              "ServiceLinkedRoleNotFoundFault",
            ]).toContain((response as any).tag);
          }),
      );
    });

    describe(
      "consumeCacheEvents",
      { tags: ["provider:aws:eventbridge"] },
      () => {
        test.provider(
          "the deploy created an EventBridge rule targeting the function",
          () =>
            Effect.gen(function* () {
              // Out-of-band via distilled: the fixture's consumeCacheEvents must
              // have materialized as a rule on the default bus with the Lambda
              // as target.
              const { RuleNames } = yield* eventbridge.listRuleNamesByTarget({
                TargetArn: functionArn,
              });
              expect((RuleNames ?? []).length).toBeGreaterThanOrEqual(1);
            }),
        );
      },
    );

    describe("ExportServerlessCacheSnapshot", () => {
      test.provider("rejects a nonexistent snapshot with a typed tag", () =>
        Effect.gen(function* () {
          const response = yield* getJson(
            `/export-probe?name=${NONEXISTENT_NAME}`,
          );
          expect([
            "ServerlessCacheSnapshotNotFoundFault",
            "InvalidParameterValueException",
            "ServiceLinkedRoleNotFoundFault",
          ]).toContain((response as any).tag);
        }),
      );
    });
  },
);