From 9c8ef21d2f6d608184a023a27e5eac75e03cbb2f Mon Sep 17 00:00:00 2001
From: Max Franz <maxkfranz@gmail.com>
Date: Fri, 7 Dec 2018 15:31:13 -0500
Subject: [PATCH] Add @josejulio's second test case, re: When using `cy.json`,
 sometimes some nodes are not being deleted #2231

---
 test/core-graph-manipulation.js | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/test/core-graph-manipulation.js b/test/core-graph-manipulation.js
index b74f132b2..9803265a5 100644
--- a/test/core-graph-manipulation.js
+++ b/test/core-graph-manipulation.js
@@ -454,7 +454,7 @@ describe('Core graph manipulation', function(){
     it('cy.json() can remove all elements', function() {
         // Issue #2231
         var cb = 0;
-        cy.on('remove', function() { cb++ });
+        cy.on('remove', function() { cb++; });
 
         cy.json({
             elements: {
@@ -472,6 +472,28 @@ describe('Core graph manipulation', function(){
         expect( cb ).to.equal(5); // 3 nodes and 2 edges
     });
 
+    it('cy.json() removes all but last element', function(){
+      // clean up before test:
+      cy.elements().remove();
+      cy.add([
+        { data: { id: 'a' } },
+        { data: { id: 'b' } },
+        { data: { id: 'c' } },
+        { data: { id: 'd' } }
+      ]);
+
+      cy.json({
+        elements: [
+          { data: { id: 'd' } }
+        ]
+      });
+
+      expect( cy.$('#a').empty(), 'node a not in graph' ).to.be.true;
+      expect( cy.$('#b').empty(), 'node b not in graph' ).to.be.true;
+      expect( cy.$('#c').empty(), 'node c not in graph' ).to.be.true;
+      expect( cy.$('#d').nonempty(), 'node d in graph' ).to.be.true;
+    });
+
     it('cy.json() removes parent', function(){
       // clean up before test:
       cy.elements().remove();