1 files changed, 51 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/longest-streak/index.js b/tools/eslint/node_modules/longest-streak/index.js
new file mode 100644
index 0000000000..719d516860
--- /dev/null
+++ b/tools/eslint/node_modules/longest-streak/index.js
@@ -0,0 +1,51 @@
+'use strict';
+
+/**
+ * Get the count of the longest repeating streak of
+ * `character` in `value`.
+ *
+ * @example
+ *   longestStreak('` foo `` bar `', '`') // 2
+ *
+ * @param {string} value - Content, coerced to string.
+ * @param {string} character - Single character to look
+ *   for.
+ * @return {number} - Number of characters at the place
+ *   where `character` occurs in its longest streak in
+ *   `value`.
+ * @throws {Error} - when `character` is not a single
+ *   character.
+ */
+function longestStreak(value, character) {
+    var count = 0;
+    var maximum = 0;
+    var index = -1;
+    var length;
+
+    value = String(value);
+    length = value.length;
+
+    if (typeof character !== 'string' || character.length !== 1) {
+        throw new Error('Expected character');
+    }
+
+    while (++index < length) {
+        if (value.charAt(index) === character) {
+            count++;
+
+            if (count > maximum) {
+                maximum = count;
+            }
+        } else {
+            count = 0;
+        }
+    }
+
+    return maximum;
+}
+
+/*
+ * Expose.
+ */
+
+module.exports = longestStreak;