Add tests.

* find-unused-sass-variables for finding unused Sass variables
* stylelint for Sass linting
* linkinator for broken links
* vnu-jar for HTML validation

1 files changed, 51 insertions, 0 deletions

diff --git a/build/vnu-jar.js b/build/vnu-jar.js
new file mode 100644
index 000000000..d343fc7cc
--- /dev/null
+++ b/build/vnu-jar.js
@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+/*!
+ * Script to run vnu-jar if Java is available.
+ * Copyright 2017-2019 The Bootstrap Authors
+ * Copyright 2017-2019 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+'use strict'
+
+const childProcess = require('child_process')
+const vnu = require('vnu-jar')
+
+childProcess.exec('java -version', (error, stdout, stderr) => {
+  if (error) {
+    console.error('Skipping vnu-jar test; Java is missing.')
+    return
+  }
+
+  const is32bitJava = !stderr.match(/64-Bit/)
+
+  // vnu-jar accepts multiple ignores joined with a `|`.
+  // Also note that the ignores are regular expressions.
+  const ignores = [
+    // IE11 doesn't recognize <main> / give the element an implicit "main" landmark.
+    // Explicit role="main" is redundant for other modern browsers, but still valid.
+    'The “main” role is unnecessary for element “main”.'
+  ].join('|')
+
+  const args = [
+    '-jar',
+    vnu,
+    '--asciiquotes',
+    '--skip-non-html',
+    '--Werror',
+    `--filterpattern "${ignores}"`,
+    '_site/'
+  ]
+
+  // For the 32-bit Java we need to pass `-Xss512k`
+  if (is32bitJava) {
+    args.splice(0, 0, '-Xss512k')
+  }
+
+  return childProcess.spawn('java', args, {
+    shell: true,
+    stdio: 'inherit'
+  })
+    .on('exit', process.exit)
+})