add tests

Author: sarahs

tests/fixtures/page-versioned-for-ghae-next.md

@@ -0,0 +1,5 @@
+---
+title: Page versioned for next GitHub AE release
+versions:
+  github-ae: 'next'
+---

tests/fixtures/page-versioned-for-next-enterprise-release.md

@@ -0,0 +1,5 @@
+---
+title: Page versioned for next Enterprise release
+versions:
+  enterprise-server: '>=3.1'
+---

tests/unit/page.js

@@ -190,6 +190,36 @@ describe('Page class', () => {
       expect($.text()).not.toBe('This text should render on any actively supported version of Enterprise Server')
       expect($.text()).toBe('This text should only render on non-Enterprise')
     })
+
+    test('support next to-be-released Enterprise Server version in frontmatter', async () => {
+      // This fixture has `enterprise-server: '>=3.1'` hardcoded in the frontmatter
+      const page = await Page.init({
+        relativePath: 'page-versioned-for-next-enterprise-release.md',
+        basePath: path.join(__dirname, '../fixtures'),
+        languageCode: 'en'
+      })
+      // set version to 3.0
+      const context = {
+        currentVersion: 'enterprise-server@3.0',
+        currentLanguage: 'en'
+      }
+      await expect(() => { return page.render(context) }).not.toThrow()
+    })
+
+    test('support next GitHub AE version in frontmatter', async () => {
+      // This fixture has `github-ae: 'next'` hardcoded in the frontmatter
+      const page = await Page.init({
+        relativePath: 'page-versioned-for-ghae-next.md',
+        basePath: path.join(__dirname, '../fixtures'),
+        languageCode: 'en'
+      })
+      // set version to @latest
+      const context = {
+        currentVersion: 'github-ae@latest',
+        currentLanguage: 'en'
+      }
+      await expect(() => { return page.render(context) }).not.toThrow()
+    })
   })
 
   test('preserves `languageCode`', async () => {