Add tests for config-parser

src/test-helpers.js

@@ -0,0 +1,37 @@
+const fs = require('fs')
+const prettier = require('prettier')
+const assert = require('assert')
+
+// Create and return the path to a temp folder
+function getTempFolder() {
+  const tmpFolder = `${__dirname}/fixtures/tmp`
+  if (!fs.existsSync(tmpFolder)) {
+    fs.mkdirSync(tmpFolder, {recursive: true})
+  }
+  return tmpFolder
+}
+
+// Read a JavaScript file and return it formatted
+function formatFile(file) {
+  const fileContent = fs.readFileSync(file, 'utf8')
+  return prettier.format(fileContent, {
+    parser: 'espree',
+
+    // Prettier options
+    printWidth: 80,
+    tabWidth: 2,
+    useTabs: false,
+    semi: false,
+    singleQuote: true,
+    trailingComma: 'none',
+    bracketSpacing: false,
+    arrowParens: 'avoid'
+  }).trim()
+}
+
+// Compare two JavaScript files
+function compareFiles(actualFile, expectedFile) {
+  assert.equal(formatFile(actualFile), formatFile(expectedFile))
+}
+
+module.exports = {getTempFolder, formatFile, compareFiles}