/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

import React from "react";
import { shallow } from "enzyme";
import PreviewFunction from "../PreviewFunction";

function render(props) {
  return shallow(React.createElement(PreviewFunction, props), {
    context: {
      l10n: L10N,
    },
  });
}

describe("PreviewFunction", () => {
  it("should return a span", () => {
    const item = { name: "" };
    const returnedSpan = render({ func: item });
    expect(returnedSpan).toMatchSnapshot();
    expect(returnedSpan.name()).toEqual("span");
  });

  it('should return a span with a class of "function-signature"', () => {
    const item = { name: "" };
    const returnedSpan = render({ func: item });
    expect(returnedSpan.hasClass("function-signature")).toBe(true);
  });

  it("should return a span with 3 children", () => {
    const item = { name: "" };
    const returnedSpan = render({ func: item });
    expect(returnedSpan.children()).toHaveLength(3);
  });

  describe("function name", () => {
    it("should be a span", () => {
      const item = { name: "" };
      const returnedSpan = render({ func: item });
      expect(returnedSpan.children().first().name()).toEqual("span");
    });

    it('should have a "function-name" class', () => {
      const item = { name: "" };
      const returnedSpan = render({ func: item });
      expect(returnedSpan.children().first().hasClass("function-name")).toBe(
        true
      );
    });

    it("should be be set to userDisplayName if defined", () => {
      const item = {
        name: "",
        displayName: "chuck",
      };
      const returnedSpan = render({ func: item });
      expect(returnedSpan.children().first().first().text()).toEqual("chuck");
    });

    it('should use displayName if defined & no "userDisplayName" exist', () => {
      const item = {
        displayName: "norris",
        name: "last",
      };
      const returnedSpan = render({ func: item });
      expect(returnedSpan.children().first().first().text()).toEqual("norris");
    });

    it('should use to name if no "userDisplayName"/"displayName" exist', () => {
      const item = {
        name: "last",
      };
      const returnedSpan = render({ func: item });
      expect(returnedSpan.children().first().first().text()).toEqual("last");
    });
  });

  describe("render parentheses", () => {
    let leftParen;
    let rightParen;

    beforeAll(() => {
      const item = { name: "" };
      const returnedSpan = render({ func: item });
      const children = returnedSpan.children();
      leftParen = returnedSpan.childAt(1);
      rightParen = returnedSpan.childAt(children.length - 1);
    });

    it("should be spans", () => {
      expect(leftParen.name()).toEqual("span");
      expect(rightParen.name()).toEqual("span");
    });

    it("should create a left paren", () => {
      expect(leftParen.text()).toEqual("(");
    });

    it("should create a right paren", () => {
      expect(rightParen.text()).toEqual(")");
    });
  });

  describe("render parameters", () => {
    let returnedSpan;
    let children;

    beforeAll(() => {
      const item = {
        name: "",
        parameterNames: ["one", "two", "three"],
      };
      returnedSpan = render({ func: item });
      children = returnedSpan.children();
    });

    it("should render spans according to the dynamic params given", () => {
      expect(children).toHaveLength(8);
    });

    it("should render the parameters names", () => {
      expect(returnedSpan.childAt(2).text()).toEqual("one");
    });

    it("should render the parameters commas", () => {
      expect(returnedSpan.childAt(3).text()).toEqual(", ");
    });
  });
});
