Create a resuable combo box component to choose and search a particular skill

__mocks__/combobox.js

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+export const ComboboxMockData = [
+    {
+        id: 1,
+        name: "React",
+    },
+    {
+        id: 2,
+        name: "Go",
+    },
+    {
+        id: 3,
+        name: "Vanilla JS",
+    },
+];

__tests__/Unit/Componets/Combobox/Combobox.test.tsx

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+import React from "react";
+import { render, fireEvent, screen, waitFor } from "@testing-library/react";
+import { ComboboxMockData } from "../../../../__mocks__/combobox";
+import ComboboxDropdown from "@/components/Combobox";
+
+describe("Combobox Component", () => {
+    it("should render with placeholder and dropdown closed", () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+
+        const input = screen.getByRole("combobox");
+        expect(input).toHaveAttribute("placeholder", "placeholder");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is not visible
+    });
+
+    it("should open dropdown on button click and display the options", async () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+    });
+
+    it("Select a value from the combobox list", async () => {
+        const onChangeMock = jest.fn();
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" onChange={onChangeMock} />);
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+
+        fireEvent.click(screen.getByText("React"));
+        expect(onChangeMock).toHaveBeenCalledWith({ id: 1, name: "React" });
+    });
+
+    it("filters the options based on input value", async () => {
+        render(<ComboboxDropdown onChange={() => {}} placeholder="placeholder" options={ComboboxMockData} />);
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        const button = screen.getByRole("button");
+        fireEvent.click(button);
+        await screen.findByRole("listbox");
+
+        const input = screen.getByPlaceholderText("placeholder");
+        fireEvent.change(input, { target: { value: "React", id: 1 } });
+
+        await waitFor(() => {
+            expect(screen.getByText("React")).toBeInTheDocument();
+        });
+
+        screen.debug();
+    });
+
+    it("Display No Results option when no options are present", async () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+        const input = screen.getByRole("combobox");
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.change(input, { target: { value: "NonexistentSkill" } });
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        await screen.findByText("No Results");
+
+        expect(screen.getByText("No Results")).toBeInTheDocument();
+    });
+
+    it("Close the combo box when clicked outside", async () => {
+        render(
+            <div>
+                <ComboboxDropdown onChange={() => {}} placeholder="placeholder" options={ComboboxMockData} />
+                <div data-testid="outside-element">Outside Element</div>
+            </div>
+        );
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        const button = screen.getByRole("button");
+        fireEvent.click(button);
+
+        // Ensure the dropdown is open
+        await screen.findByRole("listbox");
+        expect(screen.getByRole("listbox")).toBeInTheDocument();
+
+        const outsideElement = screen.getByTestId("outside-element");
+        fireEvent.mouseDown(outsideElement);
+        fireEvent.mouseUp(outsideElement);
+        fireEvent.click(outsideElement);
+
+        // Wait for the dropdown to close
+        await waitFor(() => {
+            expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        });
+    });
+});

__tests__/Unit/Componets/SkillComboBox/SkillComboBox.test.tsx

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+import React from "react";
+import { render, fireEvent, screen, waitFor } from "@testing-library/react";
+import SkillCombobox from "@/components/SkillComboBox";
+import { skillMockData } from "../../../../__mocks__/endorsements";
+
+describe("SkillCombobox Component", () => {
+    it("should render with placeholder and dropdown closed", () => {
+        render(<SkillCombobox options={skillMockData} placeholder="select skill" />);
+
+        const input = screen.getByRole("combobox");
+        expect(input).toHaveAttribute("placeholder", "select skill");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is not visible
+    });
+
+    it("should open dropdown on button click and display the options", async () => {
+        render(<SkillCombobox options={skillMockData} placeholder="select skill" />);
+
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+    });
+
+    it("Select a value from the combobox list", async () => {
+        const onChangeMock = jest.fn();
+        render(<SkillCombobox options={skillMockData} placeholder="select skill" onChange={onChangeMock} />);
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+
+        fireEvent.click(screen.getByText("React"));
+        expect(onChangeMock).toHaveBeenCalledWith({ id: 1, skill: "React" });
+    });
+
+    it("filters the options based on input value", async () => {
+        render(<SkillCombobox onChange={() => {}} placeholder="select skill" options={skillMockData} />);
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        const button = screen.getByRole("button");
+        fireEvent.click(button);
+        await screen.findByRole("listbox");
+
+        const input = screen.getByPlaceholderText("select skill");
+        fireEvent.change(input, { target: { value: "React", id: 1 } });
+
+        await waitFor(() => {
+            expect(screen.getByText("React")).toBeInTheDocument();
+        });
+
+        screen.debug();
+    });
+
+    it("Display Add new Skill option when no options are present and add new skill click perform action", async () => {
+        const handleAddSkill = jest.fn();
+
+        render(<SkillCombobox options={skillMockData} placeholder="select skill" handleAddSkill={handleAddSkill} />);
+        const input = screen.getByRole("combobox");
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.change(input, { target: { value: "NonexistentSkill" } });
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        await screen.findByText("Add New Skill");
+
+        await fireEvent.click(screen.getByText("Add New Skill"));
+
+        expect(handleAddSkill).toHaveBeenCalled();
+    });
+
+    it("Close the combo box when clicked outside", async () => {
+        render(
+            <div>
+                <SkillCombobox
+                    onChange={() => {}}
+                    placeholder="select skill"
+                    options={skillMockData}
+                    handleAddSkill={() => {}}
+                />
+                <div data-testid="outside-element">Outside Element</div>
+            </div>
+        );
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        const button = screen.getByRole("button");
+        fireEvent.click(button);
+
+        // Ensure the dropdown is open
+        await screen.findByRole("listbox");
+        expect(screen.getByRole("listbox")).toBeInTheDocument();
+
+        const outsideElement = screen.getByTestId("outside-element");
+        fireEvent.mouseDown(outsideElement);
+        fireEvent.mouseUp(outsideElement);
+        fireEvent.click(outsideElement);
+
+        // Wait for the dropdown to close
+        await waitFor(() => {
+            expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        });
+    });
+});

__tests__/components/combobox/Combobox.test.tsx

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+import React from "react";
+import { render, fireEvent, screen, waitFor } from "@testing-library/react";
+import { ComboboxMockData } from "../../../__mocks__/combobox";
+import ComboboxDropdown from "@/components/Combobox";
+
+global.ResizeObserver = class {
+    observe() {}
+    unobserve() {}
+    disconnect() {}
+};
+
+describe("Combobox Component", () => {
+    it("Should display combobox with placeholder and Down arrow icon", async () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+
+        expect(screen.getByRole("combobox")).toBeInTheDocument();
+        expect(screen.getByPlaceholderText("placeholder")).toBeInTheDocument();
+        expect(screen.getByAltText("expand")).toBeInTheDocument();
+    });
+
+    it("should open dropdown on button click and display the options", async () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+    });
+
+    it("Select a value from the combobox list", async () => {
+        const onChangeMock = jest.fn();
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" onChange={onChangeMock} />);
+        const button = screen.getByRole("button");
+
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.click(button);
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        expect(screen.getByText("React")).toBeInTheDocument();
+        expect(screen.getByText("Go")).toBeInTheDocument();
+        expect(screen.getByText("Vanilla JS")).toBeInTheDocument();
+
+        fireEvent.click(screen.getByText("React"));
+        expect(onChangeMock).toHaveBeenCalledWith({ id: 1, name: "React" });
+    });
+
+    it("filters the options based on input value", async () => {
+        render(<ComboboxDropdown onChange={() => {}} placeholder="placeholder" options={ComboboxMockData} />);
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument();
+        const button = screen.getByRole("button");
+        fireEvent.click(button);
+        await screen.findByRole("listbox");
+
+        const input = screen.getByPlaceholderText("placeholder");
+        fireEvent.change(input, { target: { value: "React", id: 1 } });
+
+        await waitFor(() => {
+            expect(screen.getByText("React")).toBeInTheDocument();
+        });
+
+        screen.debug();
+    });
+
+    it("Display No Results option when no options are present", async () => {
+        render(<ComboboxDropdown options={ComboboxMockData} placeholder="placeholder" />);
+        const input = screen.getByRole("combobox");
+        expect(screen.queryByRole("listbox")).not.toBeInTheDocument(); // Check listbox is initially closed
+
+        fireEvent.change(input, { target: { value: "NonexistentSkill" } });
+
+        await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for dropdown animation
+
+        await screen.findByRole("listbox");
+
+        await screen.findByText("No Results");
+    });
+});