chore: migrate test cases from Chai to Jest

src/render/render.spec.ts

@@ -0,0 +1,65 @@
+import { Context } from '../context'
+import { HTMLToken, TagToken } from '../tokens'
+import { Render } from './render'
+import { Tag, HTML } from '../template'
+import { SimpleEmitter } from '../emitters'
+import { toPromise } from '../util'
+
+describe('render', function () {
+  let render: Render
+  beforeEach(function () {
+    render = new Render()
+  })
+
+  describe('.renderTemplates()', function () {
+    it('should render html', async function () {
+      const scope = new Context()
+      const token = { getContent: () => '<p>' } as HTMLToken
+      const html = await toPromise(render.renderTemplates([new HTML(token)], scope, new SimpleEmitter()))
+      return expect(html).toBe('<p>')
+    })
+  })
+
+  describe('.renderTemplatesToNodeStream()', function () {
+    it('should render to html stream', function (done) {
+      const scope = new Context()
+      const tpls = [
+        new HTML({ getContent: () => '<p>' } as HTMLToken),
+        new HTML({ getContent: () => '</p>' } as HTMLToken)
+      ]
+      const stream = render.renderTemplatesToNodeStream(tpls, scope)
+      let result = ''
+      stream.on('data', (data) => {
+        result += data
+      })
+      stream.on('end', () => {
+        expect(result).toBe('<p></p>')
+        done()
+      })
+    })
+    it('should render to html stream asyncly', function (done) {
+      const scope = new Context()
+      class CustomTag extends Tag {
+        render () {
+          return new Promise(
+            resolve => setTimeout(() => resolve('async tag'), 10)
+          )
+        }
+      }
+      const tpls = [
+        new HTML({ getContent: () => '<p>' } as HTMLToken),
+        new CustomTag({ content: 'foo', args: '', name: 'foo' } as TagToken, [], {} as any),
+        new HTML({ getContent: () => '</p>' } as HTMLToken)
+      ]
+      const stream = render.renderTemplatesToNodeStream(tpls, scope)
+      let result = ''
+      stream.on('data', (data) => {
+        result += data
+      })
+      stream.on('end', () => {
+        expect(result).toBe('<p>async tag</p>')
+        done()
+      })
+    })
+  })
+})