tech-log-frontend/tests/features/tech-log/style-contract.test.ts

// @vitest-environment jsdom

import { render } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { createElement } from "react";
import { MemoryRouter } from "react-router-dom";
import { afterAll, beforeAll, describe, expect, it } from "vitest";

import { createTechLogFeatureInstalledInput } from "../../../src/features/tech-log/adapters/create-tech-log-feature-input.ts";
import { FatalErrorState } from "../../../src/features/tech-log/presentation/public/components/fatal-error-state.tsx";
import { PublicShell } from "../../../src/features/tech-log/presentation/public/public-shell.tsx";
import { ApplicationProvider } from "../../../src/presentation/providers/application-provider.tsx";
import { createTestApplication } from "../../helpers/create-test-application.ts";

let styleElement: HTMLStyleElement;

beforeAll(() => {
  styleElement = document.createElement("style");
  styleElement.textContent = readFileSync(
    resolve(
      process.cwd(),
      "src/features/tech-log/presentation/styles/globals.css",
    ),
    "utf8",
  );
  document.head.append(styleElement);
});

afterAll(() => {
  styleElement.remove();
});

function renderPublicSurface(node: React.ReactNode) {
  const techLog = createTechLogFeatureInstalledInput().input;
  const shell = createElement(PublicShell, { children: node });
  const router = createElement(
    MemoryRouter,
    { initialEntries: ["/projects"] },
    shell,
  );
  return render(
    createElement(ApplicationProvider, {
      application: createTestApplication({
        featureInputs: { "tech-log": techLog },
      }),
      children: router,
    }),
  );
}

describe("TechLog consumer-visible style contract", () => {
  it("applies the source typography, palette, shell width, and header spacing", () => {
    const view = renderPublicSurface(
      createElement(
        "main",
        { id: "main-content", className: "shell" },
        "공개 본문",
      ),
    );

    const rootStyle = getComputedStyle(document.documentElement);
    const bodyStyle = getComputedStyle(document.body);
    const headerInner = view.container.querySelector<HTMLElement>(
      ".header-inner",
    );
    const main = view.getByRole("main");
    const wordmark = view.getByRole("link", { name: "TechLog 홈" });

    expect(rootStyle.getPropertyValue("--canvas")).toBe("#f7f7f5");
    expect(rootStyle.getPropertyValue("--ink")).toBe("#17181b");
    expect(rootStyle.getPropertyValue("--signal")).toBe("#3e5cc7");
    expect(rootStyle.getPropertyValue("--shell")).toBe("1180px");
    expect(rootStyle.getPropertyValue("--body-copy")).toBe("42rem");
    expect(rootStyle.color).toBe("var(--ink)");
    expect(rootStyle.background).toBe("var(--canvas)");
    expect(bodyStyle.color).toBe("var(--ink)");
    expect(bodyStyle.background).toContain(
      "linear-gradient(to bottom, rgba(255, 255, 255, 0.45), transparent 420px)",
    );
    expect(bodyStyle.background).toContain("var(--canvas)");
    expect(bodyStyle.fontFamily).toContain("Pretendard Variable");
    expect(bodyStyle.fontSize).toBe("16px");
    expect(bodyStyle.fontWeight).toBe("400");
    expect(bodyStyle.lineHeight).toBe("1.6");
    expect(bodyStyle.minWidth).toBe("320px");
    expect(headerInner).not.toBeNull();
    expect(getComputedStyle(headerInner!).display).toBe("grid");
    expect(getComputedStyle(headerInner!).minHeight).toBe("76px");
    expect(getComputedStyle(headerInner!).gap).toBe("48px");
    expect(getComputedStyle(main).width).toBe(
      "min(var(--shell), calc(100% - 80px))",
    );
    expect(getComputedStyle(wordmark).fontSize).toBe("17px");
    expect(getComputedStyle(wordmark).fontWeight).toBe("680");
  });

  it("preserves keyboard focus and the real search-field focus relationship", async () => {
    const user = userEvent.setup();
    const view = renderPublicSurface(
      createElement(
        "main",
        { id: "main-content", className: "shell" },
        "공개 본문",
      ),
    );
    const wordmark = view.getByRole("link", { name: "TechLog 홈" });
    const searchInput = view.container.querySelector<HTMLInputElement>(
      ".search-field input",
    );
    const searchField = view.container.querySelector<HTMLElement>(
      ".search-field",
    );

    await user.tab();
    await user.tab();
    expect(wordmark).toHaveFocus();

    searchInput!.focus();

    expect(searchInput).toHaveFocus();
    expect(searchField).not.toBeNull();
    expect(searchField!.matches(":focus-within")).toBe(true);
  });

  it("keeps every header and dialog control at the source minimum target size", () => {
    const view = renderPublicSurface(
      createElement(
        "main",
        { id: "main-content", className: "shell" },
        "공개 본문",
      ),
    );

    const wordmark = view.getByRole("link", { name: "TechLog 홈" });
    const navLink = view.container.querySelector<HTMLElement>(".nav-link");
    const searchButton = view.getByRole("button", {
      name: "TechLog 검색 열기",
    });
    const closeButton = view.container.querySelector<HTMLElement>(
      ".dialog-close",
    );
    const searchField = view.container.querySelector<HTMLElement>(
      ".search-field",
    );
    const dialogInner = view.container.querySelector<HTMLElement>(
      ".search-dialog-inner",
    );

    expect(getComputedStyle(wordmark).minHeight).toBe("44px");
    expect(getComputedStyle(navLink!).minHeight).toBe("44px");
    expect(getComputedStyle(searchButton).minHeight).toBe("44px");
    expect(getComputedStyle(closeButton!).minWidth).toBe("52px");
    expect(getComputedStyle(closeButton!).minHeight).toBe("44px");
    expect(getComputedStyle(searchField!).minHeight).toBe("56px");
    expect(getComputedStyle(searchField!).marginTop).toBe("24px");
    expect(getComputedStyle(searchField!).backgroundColor).toBe(
      "rgb(255, 255, 255)",
    );
    expect(getComputedStyle(dialogInner!).padding).toBe("27px 28px 22px");
  });

  it("preserves footer spacing and fatal-action sizing", () => {
    const view = renderPublicSurface(
      createElement(FatalErrorState, {
        traceId: "PUBLIC-500",
        retryHref: "/",
      }),
    );

    const footerInner = view.container.querySelector<HTMLElement>(
      ".footer-inner",
    );
    const retry = view.getByRole("link", { name: "다시 시도" });

    expect(getComputedStyle(footerInner!).minHeight).toBe("172px");
    expect(getComputedStyle(footerInner!).gap).toBe("40px");
    expect(getComputedStyle(retry).minHeight).toBe("44px");
    expect(getComputedStyle(retry).marginTop).toBe("34px");
  });
});