add test for create Item function

src/functions/item/__tests__/create.test.js

@@ -0,0 +1,66 @@
+import { describe, expect, it } from "@jest/globals";
+
+import { handler } from "../create";
+
+describe("CREATE Item", () => {
+  it("receives an empty body", async () => {
+    const response = await handler({
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: null,
+    });
+
+    expect(response).toStrictEqual({
+      statusCode: 400,
+      headers: { "Content-Type": "application/json" },
+      body: '{"issues":[{"code":"invalid_type","expected":"object","received":"null","path":[],"message":"Expected object, received null"}],"name":"ZodError"}',
+    });
+  });
+
+  it("creates a new item", async () => {
+    const event = {
+      headers: {
+        "Content-Type": "application/json",
+      },
+      pathParameters: { listId: "1" },
+      body: JSON.stringify({
+        name: "My Wedding Item",
+        description: "This is my wedding gift item.",
+        price: 15,
+      }),
+    };
+    const response = await handler(event);
+
+    expect(response.statusCode).toBe(200);
+
+    const body = JSON.parse(response.body);
+
+    expect(body.id).toMatch(/^[A-Z0-9]{26}$/);
+    expect(body.listId).toBe("1");
+    expect(body.name).toBe("My Wedding Item");
+    expect(body.description).toBe("This is my wedding gift item.");
+    expect(body.price).toBe(15);
+
+    const dateRegExp =
+      /^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{3}Z$/;
+    expect(body.createdAt).toMatch(dateRegExp);
+    expect(body.updatedAt).toMatch(dateRegExp);
+  });
+
+  it("does not received all required properties", async () => {
+    const event = {
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({ param: "1" }),
+    };
+    const response = await handler(event);
+
+    expect(response).toStrictEqual({
+      statusCode: 400,
+      headers: { "Content-Type": "application/json" },
+      body: '{"issues":[{"code":"invalid_type","expected":"string","received":"undefined","path":["name"],"message":"Required"},{"code":"invalid_type","expected":"string","received":"undefined","path":["description"],"message":"Required"},{"code":"invalid_type","expected":"number","received":"undefined","path":["price"],"message":"Required"}],"name":"ZodError"}',
+    });
+  });
+});

src/functions/item/create.ts

@@ -0,0 +1,36 @@
+import middy from "@middy/core";
+import httpErrorHandler from "@middy/http-error-handler";
+import httpJsonBodyParser from "@middy/http-json-body-parser";
+import { APIGatewayProxyEventV2, Handler } from "aws-lambda";
+import { z } from "zod";
+
+import { Item } from "../../models/table";
+import { ValidationError } from "../../utils/validationError";
+
+const createItemHandler: Handler<APIGatewayProxyEventV2> = async (event) => {
+  const itemSchema = z.object({
+    name: z.string(),
+    description: z.string(),
+    price: z.number(),
+  }) satisfies z.ZodType<Item>;
+
+  const item = itemSchema.safeParse(event.body);
+  if (!item.success) {
+    throw new ValidationError(400, item.error);
+  }
+
+  const createdItem = await Item.create({
+    listId: event.pathParameters?.listId,
+    ...item.data,
+  });
+
+  return {
+    statusCode: 200,
+    body: JSON.stringify(createdItem),
+  };
+};
+
+export const handler = middy()
+  .use(httpErrorHandler({ logger: false }))
+  .use(httpJsonBodyParser())
+  .handler(createItemHandler);