From 30f5a8f8ca2ffdf7fc36b451b52ebfe5757a837e Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@mongodb.com>
Date: Wed, 25 Mar 2020 10:24:37 -0400
Subject: [PATCH] fix: improve EJSON generation for previously skipped edge
 cases

These cases were explicitly disabled in the BSON corpus test runner
but are now supported.
---
 lib/double.js | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/double.js b/lib/double.js
index 4f2db4f2..b5eb36b1 100644
--- a/lib/double.js
+++ b/lib/double.js
@@ -1,4 +1,5 @@
 'use strict';
+
 /**
  * A class representation of the BSON Double type.
  */
@@ -41,16 +42,22 @@ class Double {
     if (options && (options.legacy || (options.relaxed && isFinite(this.value)))) {
       return this.value;
     }
-    return { $numberDouble: this.value.toString() };
+
+    if (Object.is(Math.sign(this.value), -0)) {
+      return { $numberDouble: `-${this.value.toFixed(1)}` };
+    }
+
+    return {
+      $numberDouble: Number.isInteger(this.value) ? this.value.toFixed(1) : this.value.toString()
+    };
   }
 
   /**
    * @ignore
    */
   static fromExtendedJSON(doc, options) {
-    return options && options.relaxed
-      ? parseFloat(doc.$numberDouble)
-      : new Double(parseFloat(doc.$numberDouble));
+    const doubleValue = parseFloat(doc.$numberDouble);
+    return options && options.relaxed ? doubleValue : new Double(doubleValue);
   }
 }