File: preview_component_spec.rb

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describe PreviewComponent do
  before do
    ViewComponent::Preview.load_previews
  end

  it "renders the preview" do
    render_preview(:default)

    expect(page).to have_css "h1", text: "Lorem Ipsum"
  end
end

describe "PreviewComponent" do
  before do
    ViewComponent::Preview.load_previews
  end

  it "raises an error" do
    expect { render_preview(:default) }.to raise_error(/expected a described_class/)
  end
end