Rename spec -> test

'Test' is a lot more straightforward of a name.

test/helpers/random_helpers.cc

@@ -0,0 +1,35 @@
+#include <string>
+#include <stdlib.h>
+
+using std::string;
+
+static string random_string(char min, char max) {
+  string result;
+  size_t length = random() % 12;
+  for (size_t i = 0; i < length; i++) {
+    char inserted_char = min + (random() % (max - min));
+    result += inserted_char;
+  }
+  return result;
+}
+
+static string random_char(string characters) {
+  size_t index = random() % characters.size();
+  return string() + characters[index];
+}
+
+string random_words(size_t count) {
+  string result;
+  bool just_inserted_word = false;
+  for (size_t i = 0; i < count; i++) {
+    if (random() % 10 < 6) {
+      result += random_char("!(){}[]<>+-=");
+    } else {
+      if (just_inserted_word)
+        result += " ";
+      result += random_string('a', 'z');
+      just_inserted_word = true;
+    }
+  }
+  return result;
+}