Move random string helpers into a separate file

spec/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;
+}

spec/helpers/random_helpers.h

@@ -0,0 +1,8 @@
+#ifndef HELPERS_RANDOM_HELPERS_H_
+#define HELPERS_RANDOM_HELPERS_H_
+
+#include <string>
+
+std::string random_words(size_t count);
+
+#endif  // HELPERS_RANDOM_HELPERS_H_

spec/integration/corpus_specs.cc

@@ -7,6 +7,7 @@
 #include "helpers/point_helpers.h"
 #include "helpers/encoding_helpers.h"
 #include "helpers/record_alloc.h"
+#include "helpers/random_helpers.h"
 #include <set>
 
 static void expect_the_correct_tree(TSNode node, TSDocument *document, string tree_string) {
@@ -60,37 +61,6 @@ static void expect_a_consistent_tree(TSNode node, TSDocument *document) {
     AssertThat(has_changes, Equals(some_child_has_changes));
 }
 
-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];
-}
-
-static 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;
-}
-
 START_TEST
 
 describe("The Corpus", []() {