feat: Add Jest configuration and tests for project and user handlers

tasker-server/tests/getProjects.test.ts

@@ -0,0 +1,73 @@
+const mockQuery = jest.fn();
+
+import { handler } from "../src/handlers/getProjects";
+
+jest.mock("@aws-sdk/lib-dynamodb", () => ({
+  DynamoDBDocument: {
+    from: jest.fn(() => ({
+      query: mockQuery,
+    })),
+  },
+}));
+
+describe("getProjects handler", () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("should retrieve projects and return a 200 response", async () => {
+    const mockProjects = [
+      { projectId: "project_1", name: "Project 1" },
+      { projectId: "project_2", name: "Project 2" },
+    ];
+
+    mockQuery.mockResolvedValue({
+      Items: mockProjects,
+    });
+
+    const response = await handler({});
+
+    expect(mockQuery).toHaveBeenCalledWith({
+      TableName: "mock-project-table",
+      KeyConditionExpression: "category = :category",
+      ExpressionAttributeValues: {
+        ":category": "projects",
+      },
+    });
+
+    expect(response).toEqual({
+      statusCode: 200,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify(mockProjects),
+    });
+  });
+
+  it("should return a 500 response if the query fails", async () => {
+    const mockError = new Error("DynamoDB query error");
+    mockQuery.mockRejectedValue(mockError);
+
+    const response = await handler({});
+
+    expect(mockQuery).toHaveBeenCalledWith({
+      TableName: "mock-project-table",
+      KeyConditionExpression: "category = :category",
+      ExpressionAttributeValues: {
+        ":category": "projects",
+      },
+    });
+
+    expect(response).toEqual({
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error retrieving projects: ${mockError.message}`,
+      }),
+    });
+  });
+});