Prohlížeč zdrojového kódu

require "rails_helper"

RSpec.describe "Source browser", type: :system do
  before { SourceBrowser.reload! }

  it "navigates a .js file without a full browser reload and restores placeholder on back" do
    visit source_index_path

    within "#source-content" do
      expect(page).to have_text("Vyberte soubor pro zobrazení zdrojového kódu.")
    end

    # Expand the full tree so every file link is reachable
    page.execute_script("document.querySelectorAll('details').forEach(d => d.open = true)")

    # Mark the current window — survives Turbo Drive navigation, gone after a full browser reload
    page.execute_script("window.__pageMarker = true")

    find("a[href='#{source_show_path(path: "app/javascript/application.js")}']").click

    within "#source-content" do
      expect(page).to have_text("@hotwired/turbo-rails")
    end

    expect(page.evaluate_script("window.__pageMarker")).to be true

    # URL should have advanced in history
    expect(page.current_url).to end_with(source_show_path(path: "app/javascript/application.js"))

    # Back button should restore the previous URL and the placeholder
    page.go_back
    expect(page.current_url).to end_with(source_index_path)

    within "#source-content" do
      expect(page).to have_text("Vyberte soubor pro zobrazení zdrojového kódu.")
    end
  end

  it "restores active item and expands its ancestors after back navigation" do
    visit source_index_path
    page.execute_script("document.querySelectorAll('details').forEach(d => d.open = true)")

    # Step 1 – navigate to a deeply nested file
    find("a[href='#{source_show_path(path: "app/javascript/controllers/application.js")}']").click
    within "#source-content" do
      expect(page).to have_text("Application.start()")
    end

    # Step 2 – navigate to a file in a different branch (expand tree first so it is reachable)
    page.execute_script("document.querySelectorAll('details').forEach(d => d.open = true)")
    find("a[href='#{source_show_path(path: "app/examples/sorting_algorithms/example.yml")}']").click
    within "#source-content" do
      expect(page).to have_text("bubble_sort")
    end

    # Step 3 – collapse the javascript directory
    within "#source-tree" do
      find("summary", text: "javascript").click
    end

    # Step 4 – go back; Turbo Drive restores the cached page, then syncActive() runs
    page.go_back
    within "#source-content" do
      expect(page).to have_text("Application.start()")
    end

    # Active class must be set on the correct link
    within "#source-tree" do
      expect(page).to have_css(
        ".tree-file.active a[href='#{source_show_path(path: "app/javascript/controllers/application.js")}']"
      )
    end

    # The link must be visible — syncActive() must have reopened the ancestor <details>
    within "#source-tree" do
      expect(page).to have_css(
        "a[href='#{source_show_path(path: "app/javascript/controllers/application.js")}']",
        visible: true
      )
    end
  end
end