test: add new tests for multiple examples

Added tests for CSS modules, Custom Documents and the Default Editor example

demos/src/Examples/CustomDocument/Vue/index.spec.js

@@ -1,7 +1,48 @@
 context('/src/Examples/CustomDocument/Vue/', () => {
-  before(() => {
+  beforeEach(() => {
     cy.visit('/src/Examples/CustomDocument/Vue/')
   })
 
-  // TODO: Write tests
+  it('should have a working tiptap instance', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      // eslint-disable-next-line
+      expect(editor).to.not.be.null
+    })
+  })
+
+  it('should have a headline and a paragraph', () => {
+    cy.get('.ProseMirror h1').should('exist').should('have.text', 'It’ll always have a heading …')
+    cy.get('.ProseMirror p').should('exist').should('have.text', '… if you pass a custom document. That’s the beauty of having full control over the schema.')
+  })
+
+  it('should have a tooltip for a paragraph on a new line', () => {
+    cy.get('.ProseMirror').type('{enter}')
+    cy.get('.ProseMirror p[data-placeholder]').should('exist').should('have.attr', 'data-placeholder', 'Can you add some further context?')
+  })
+
+  it('should have a headline after clearing the document', () => {
+    cy.get('.ProseMirror').type('{selectall}{backspace}')
+    cy.wait(100)
+    cy.get('.ProseMirror').focus()
+    cy.get('.ProseMirror h1[data-placeholder]')
+      .should('exist')
+      .should('have.attr', 'class', 'is-empty is-editor-empty')
+      .should('have.attr', 'data-placeholder', 'What’s the title?')
+  })
+
+  it('should have a headline after clearing the document & enter paragraph automatically after adding a headline', () => {
+    cy.get('.ProseMirror').type('{selectall}{backspace}Hello world{enter}')
+    cy.wait(100)
+    cy.get('.ProseMirror h1')
+      .should('exist')
+      .should('have.text', 'Hello world')
+    cy.get('.ProseMirror p[data-placeholder]')
+      .should('exist')
+      .should('have.attr', 'data-placeholder', 'Can you add some further context?')
+
+    cy.get('.ProseMirror').type('This is a paragraph for this test document')
+    cy.get('.ProseMirror p')
+      .should('exist')
+      .should('have.text', 'This is a paragraph for this test document')
+  })
 })