Basic controller tests

test/functional/admin/landing_pages_controller_test.rb

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+require "test_helper"
+
+class Admin::LandingPagesControllerTest < ActionController::TestCase
+  setup do
+    login_as :gds_admin
+  end
+
+  should_be_an_admin_controller
+
+  test "GET :new prepares an unsaved instance" do
+    get :new
+
+    assert assigns(:edition).is_a? LandingPage
+    assert_not assigns(:edition).persisted?
+    assert_response :success
+    assert_template "new"
+  end
+
+  test "POST :create saves a new instance with the supplied valid params" do
+    landing_page_attrs = attributes_for(:landing_page, title: "Hello there", summary: "Landing page summary", body: "blocks:")
+                             .merge(
+                               document_attributes: {
+                                 slug: "/landing-page/test",
+                               },
+                             )
+
+    post :create, params: { edition: landing_page_attrs }
+
+    assert assigns(:edition).persisted?
+    assert_equal "Hello there", assigns(:edition).title
+    assert_equal "Landing page summary", assigns(:edition).summary
+    assert_equal "blocks:", assigns(:edition).body
+    assert_equal "/landing-page/test", assigns(:edition).base_path
+    assert_redirected_to admin_landing_page_path(assigns(:edition))
+  end
+
+  test "POST :create doesn't save the new instance when the supplied params are invalid" do
+    attrs = attributes_for(:landing_page, title: "")
+
+    post :create, params: { edition: attrs }
+
+    assert_not assigns(:edition).persisted?
+    assert_response :success
+    assert_template "new"
+  end
+
+  test "GET :edit fetches the supplied instance" do
+    page = create(:landing_page)
+
+    get :edit, params: { id: page }
+
+    assert_equal page, assigns(:edition)
+    assert_response :success
+    assert_template "edit"
+  end
+
+  test "PUT :update changes the supplied instance with the supplied params" do
+    attrs = attributes_for(:landing_page, title: "Hello there")
+    page = create(:landing_page, title: "Goodbye")
+
+    post :update, params: {
+      id: page,
+      edition: attrs,
+    }
+
+    assert_equal page, assigns(:edition)
+    assert_equal "Hello there", page.reload.title
+    assert_redirected_to admin_landing_page_path(page)
+  end
+
+  test "PUT :update doesn't save the new instance when the supplied params are invalid" do
+    attrs = attributes_for(:landing_page, title: "")
+    page = create(:landing_page, title: "Goodby")
+
+    post :update, params: { id: page, edition: attrs }
+
+    assert_equal page, assigns(:edition)
+    assert_not_equal "", page.reload.title
+    assert_equal "", assigns(:edition).title
+    assert_response :success
+    assert_template "edit"
+  end
+end