From 6bf4b90c90f15f4ab60833bddf5b5756d1a6b1f6 Mon Sep 17 00:00:00 2001
From: Elizabeth Alexander Hunt <me@liz.coffee>
Date: Thu, 2 Jul 2026 11:55:17 -0700
Subject: Init

---
 Homework/cs5260/consumer/t/S3WidgetDao.spec.ts | 115 +++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 Homework/cs5260/consumer/t/S3WidgetDao.spec.ts

(limited to 'Homework/cs5260/consumer/t/S3WidgetDao.spec.ts')

diff --git a/Homework/cs5260/consumer/t/S3WidgetDao.spec.ts b/Homework/cs5260/consumer/t/S3WidgetDao.spec.ts
new file mode 100644
index 0000000..5eb4602
--- /dev/null
+++ b/Homework/cs5260/consumer/t/S3WidgetDao.spec.ts
@@ -0,0 +1,115 @@
+import { Widget } from "@/shared/schema";
+import { expect, test, mock } from "bun:test";
+import { S3WidgetKeyGenerator } from "@/consumer/dao/keys";
+import {
+  DeleteObjectCommand,
+  GetObjectCommand,
+  PutObjectCommand,
+  S3Client,
+} from "@aws-sdk/client-s3";
+import { S3WidgetDAO } from "@/consumer/dao";
+import { VoidLogger } from "@/shared/t";
+
+const testBucket = "test-bucket";
+const testWidget = Widget.parse({
+  id: "testWidgetId",
+  owner: "simponic",
+  label: "A Widget",
+  description: "Nothing to see here!",
+});
+
+const testKeyGenerator = new S3WidgetKeyGenerator().withPrefix("test-widgets");
+
+const mockedGetSend = mock(async (req: GetObjectCommand) => {
+  if (req.input.Key == "test-widgets/simponic/testWidgetId") {
+    return {
+      Body: {
+        transformToString: () => {
+          return JSON.stringify(testWidget);
+        },
+      },
+    };
+  }
+  return {};
+});
+
+const mockedPutSendSuccessful = mock(async (req: PutObjectCommand) => {
+  if (req.input.Key == "test-widgets/simponic/testWidgetId") {
+    return {
+      ChecksumSHA256: "laksdjf-lkejfoaj",
+    };
+  }
+});
+
+const mockedDeleteSendSuccessful = mock(async (req: DeleteObjectCommand) => {
+  if (req.input.Key == "test-widgets/simponic/testWidgetId") {
+    return {
+      $metadata: true,
+    };
+  }
+});
+
+test("when given widget then retrieves from s3", async () => {
+  const mockedClient = { send: mockedGetSend };
+  const logger = new VoidLogger();
+
+  const dao = new S3WidgetDAO(
+    testBucket,
+    mockedClient as unknown as S3Client,
+    testKeyGenerator,
+    logger,
+  );
+
+  const resp = await dao.retrieve({ id: "testWidgetId", owner: "simponic" });
+
+  expect(resp?.label).toEqual(testWidget.label);
+  expect(resp?.id).toEqual(testWidget.id);
+});
+
+test("when cannot retrieve widget then returns undefined", async () => {
+  const mockedClient = { send: mockedGetSend };
+  const logger = new VoidLogger();
+
+  const dao = new S3WidgetDAO(
+    testBucket,
+    mockedClient as unknown as S3Client,
+    testKeyGenerator,
+    logger,
+  );
+
+  const resp = await dao.retrieve({
+    id: "thisWidgetDoesNotExist",
+    owner: "simponic",
+  });
+
+  expect(resp).toBeUndefined();
+});
+
+test("when given widget then puts in s3 and returns", async () => {
+  const mockedClient = { send: mockedPutSendSuccessful };
+  const logger = new VoidLogger();
+  const dao = new S3WidgetDAO(
+    testBucket,
+    mockedClient as unknown as S3Client,
+    testKeyGenerator,
+    logger,
+  );
+
+  const resp = await dao.save(testWidget);
+  expect(resp).toEqual(testWidget);
+});
+
+test("when given widget then deletes in s3 and returns", async () => {
+  const mockedClient = { send: mockedDeleteSendSuccessful };
+  const logger = new VoidLogger();
+
+  const dao = new S3WidgetDAO(
+    testBucket,
+    mockedClient as unknown as S3Client,
+    testKeyGenerator,
+    logger,
+  );
+
+  const resp = await dao.delete(testWidget);
+  expect(resp).toEqual(testWidget);
+});
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