test:add LaTeX test case

cypress/integration/menus/latex.spec.ts

@@ -0,0 +1,37 @@
+import Editor from '../../../src/editor'
+
+describe('菜单-LaTeX', () => {
+
+  beforeEach(() => {
+    cy.visit('http://localhost:3000/canvas-editor/')
+
+    cy.get('canvas').first().as('canvas').should('have.length', 1)
+  })
+
+  const text = 'canvas-editor'
+
+  it('LaTeX', () => {
+    cy.getEditor().then((editor: Editor) => {
+      editor.listener.saved = function (payload) {
+        const data = payload.data
+
+        expect(data[0].type).to.eq('latex')
+
+        expect(data[0].value).to.eq(text)
+      }
+
+      editor.command.executeSelectAll()
+
+      editor.command.executeBackspace()
+
+      cy.get('.menu-item__latex').click()
+
+      cy.get('.dialog-option__item [name="value"]').type(text)
+
+      cy.get('.dialog-menu button').eq(1).click()
+
+      cy.get('@canvas').type('{ctrl}s')
+    })
+  })
+
+})