Added index.js

index.js

@@ -0,0 +1,74 @@
+const crypto = require('crypto')
+
+/* froth
+ * num: number of test strings to return
+ * max: maximum length of test string
+ * opt: options object
+ */
+exports.froth = function(num, max, opt={
+  // Set to true to include tests with...
+  none: true, // Empty string
+  whitespace: true, // Various whitespace chars
+  quotes: true, // Combinations of quotes
+  backslashing: true, // Combinations of backslashes
+  symbols: true, // Various symbols
+  foreign: true, // Foreign chars
+  alphanumeric: true, // Ordinary letters and numbers
+} ){
+  
+  let (chars,tests) = []
+  
+  // Whitespace characters
+  if (opt.whitespace) chars.concat([
+    ' ', // Space
+    '  ', // Tab
+    '\n', // Newline
+    '\r', // Return
+    '\r\n', // Carrage return
+  ])
+  
+  // Quotation characters
+  if (opt.quotes) chars.concat([
+    '\'', '\'\'', '\'\'\'', // Single quotes
+    '"', '""', '"""', // Double quotes
+    '`', '``', '```', // Backticks
+  ])
+  
+  // Backslashes
+  if (opt.backslashing) chars.concat([
+    '\\', '\\\\',
+  ])
+  
+  // Symbols
+  if (opt.symbols) chars.concat(
+    '°~!@#$%€^&*()-_─=+[]{}|;:,./<>?¿¹²³¼½¬ł€¶ŧ←↓→»«¢„“”·…–'.split('')
+  )
+  
+  // Foreign characters
+  if (opt.foreign) chars.concat(
+    'ßöäüñáóíúýéâêîôûŷàèìòùảẻỉỏỷÿïøþłĸŋđðſæµёйцукенгшщзхъэждлорпавыфячсмитьбюЁЙЦУКЕНГШЩЗХЪЭЖДЛОРПАВЫФЯЧСМИТЬБЮ'.split('')
+  )
+  
+  // Ordinary letters and numbers
+  if (opt.alphanumeric) chars.concat(
+    'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'.split(''),
+  )
+  
+  const min = (none)? 0 : 1
+  
+  // Add tests until we have enough tests
+  for (let n=0; n<num; n++) {
+    // Pick a random number from min to max
+    len = Math.floor(Math.random() * (max - min + 1)) + min
+    // Create a string of that length
+    let s = ''
+    for (let l=0; l<len; l++) {
+      s += chars[Math.floor(Math.random()*chars.length)]
+    }
+    // Add that string to the tests
+    tests.push(s)
+  }
+  
+  return tests
+  
+}