From bad49837fe07c0cecf67fc06cb1e255af55ce2b8 Mon Sep 17 00:00:00 2001
From: Hannes Guedelhoefer <hannes@guedelhoefer.de>
Date: Wed, 15 Jul 2020 17:49:11 +0200
Subject: [PATCH] Fix null values throwing exception when traversing over while
 getting

---
 jsonpointer.js |  1 +
 test.js        | 16 ++++++++++------
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/jsonpointer.js b/jsonpointer.js
index 3f6f353..1006c04 100644
--- a/jsonpointer.js
+++ b/jsonpointer.js
@@ -73,6 +73,7 @@ function get (obj, pointer) {
     obj = obj[untilde(pointer[p++])]
     if (len === p) return obj
     if (typeof obj !== 'object') return undefined
+    if (obj === null) return null
   }
 }
 
diff --git a/test.js b/test.js
index 1897728..712ab90 100644
--- a/test.js
+++ b/test.js
@@ -8,14 +8,12 @@ var obj = {
   },
   d: {
     e: [{ a: 3 }, { b: 4 }, { c: 5 }]
-  }
+  },
+  nullValue: null
 }
 
-assert.strictEqual(jsonpointer.get(obj, '/a'), 1)
-assert.strictEqual(jsonpointer.get(obj, '/b/c'), 2)
-assert.strictEqual(jsonpointer.get(obj, '/d/e/0/a'), 3)
-assert.strictEqual(jsonpointer.get(obj, '/d/e/1/b'), 4)
-assert.strictEqual(jsonpointer.get(obj, '/d/e/2/c'), 5)
+assert.equal(jsonpointer.get(obj, '/nullValue'), null)
+assert.equal(jsonpointer.get(obj, '/nullValue/e'), null)
 
 // set returns old value
 assert.strictEqual(jsonpointer.set(obj, '/a', 2), 1)
@@ -128,6 +126,12 @@ assert.strictEqual(pointer.set(a, 'test'), 'bar')
 assert.strictEqual(pointer.get(a), 'test')
 assert.deepEqual(a, { foo: 'test' })
 
+
+// compile read null value
+var compileWithNullValue = { foo: 'bar' }
+var pointerNullValue = jsonpointer.compile('/foo2/baz')
+assert.equal(pointer.get(pointerNullValue), null)
+
 var b = {}
 jsonpointer.set({}, '/constructor/prototype/boo', 'polluted')
 assert(!b.boo, 'should not boo')