Add cypress test for lecture edit page

app/views/lectures/edit/_form.html.erb

@@ -15,6 +15,7 @@
             id="lecture-nav-content" type="button" role="tab"
              href="#content"
             data-bs-toggle="pill" data-bs-target="#lecture-pane-content"
+            data-cy="content-tab-btn"
             aria-controls="lecture-pane-content" aria-selected="true">
           <%= t('content') %>
         </button>

spec/cypress/e2e/lecture_spec.cy.js

@@ -0,0 +1,17 @@
+import FactoryBot from "../support/factorybot";
+
+describe("Lecture edit page", () => {
+  it("shows content tab button", function () {
+    cy.createUserAndLogin("teacher").as("teacher");
+
+    cy.then(() => {
+      FactoryBot.create("lecture", "with_teacher_by_id",
+        { teacher_id: this.teacher.id }).as("lecture");
+    });
+
+    cy.then(() => {
+      cy.visit(`/lectures/${this.lecture.id}/edit`);
+      cy.getBySelector("content-tab-btn").should("be.visible");
+    });
+  });
+});