1 files changed, 17 insertions, 0 deletions
diff --git a/node_modules/concordance/lib/shouldCompareDeep.js b/node_modules/concordance/lib/shouldCompareDeep.js
new file mode 100644
index 000000000..a59135507
--- /dev/null
+++ b/node_modules/concordance/lib/shouldCompareDeep.js
@@ -0,0 +1,17 @@
+'use strict'
+
+const argumentsObject = require('./complexValues/arguments').tag
+const constants = require('./constants')
+
+const AMBIGUOUS = constants.AMBIGUOUS
+const SHALLOW_EQUAL = constants.SHALLOW_EQUAL
+
+function shouldCompareDeep (result, lhs, rhs) {
+  if (result === SHALLOW_EQUAL) return true
+  if (result !== AMBIGUOUS) return false
+
+  // Properties are only ambiguous if they have symbol keys. These properties
+  // must be compared in an order-insensitive manner.
+  return lhs.tag === argumentsObject || lhs.isProperty === true
+}
+module.exports = shouldCompareDeep