Rename spec -> test

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

test/helpers/tree_helpers.cc

@@ -0,0 +1,50 @@
+#include "helpers/tree_helpers.h"
+#include "runtime/document.h"
+#include "runtime/node.h"
+#include <ostream>
+
+using std::string;
+using std::to_string;
+using std::ostream;
+
+const char *symbol_names[24] = {
+  "ERROR", "END",  "two", "three", "four", "five", "six", "seven", "eight",
+  "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",
+  "sixteen", "seventeen", "eighteen", "nineteen", "twenty", "twenty-one",
+  "twenty-two", "twenty-three"
+};
+
+Tree ** tree_array(std::vector<Tree *> trees) {
+  Tree ** result = (Tree **)calloc(trees.size(), sizeof(Tree *));
+  for (size_t i = 0; i < trees.size(); i++)
+      result[i] = trees[i];
+  return result;
+}
+
+ostream &operator<<(std::ostream &stream, const Tree *tree) {
+  static TSLanguage DUMMY_LANGUAGE = {};
+  static TSDocument DUMMY_DOCUMENT = {};
+  DUMMY_DOCUMENT.parser.language = &DUMMY_LANGUAGE;
+  DUMMY_LANGUAGE.symbol_names = symbol_names;
+  TSNode node;
+  node.data = tree;
+  return stream << string(ts_node_string(node, &DUMMY_DOCUMENT));
+}
+
+ostream &operator<<(ostream &stream, const TSNode &node) {
+  return stream << string("{") << (const Tree *)node.data <<
+    string(", ") << to_string(ts_node_start_char(node)) << string("}");
+}
+
+bool operator==(const TSNode &left, const TSNode &right) {
+  return ts_node_eq(left, right);
+}
+
+bool operator==(const std::vector<Tree *> &vec, const TreeArray &array) {
+  if (vec.size() != array.size)
+    return false;
+  for (size_t i = 0; i < array.size; i++)
+    if (array.contents[i] != vec[i])
+      return false;
+  return true;
+}