Additional null tests

Author: evanphx

v5/patch_test.go

@@ -578,6 +578,13 @@ var Cases = []Case{
 false,
 false,
 },
+{
+`{}`,
+`[{"op": "replace", "path": "", "value": null}]`,
+`null`,
+false,
+false,
+},
 }
 
 type BadCase struct {
@@ -732,6 +739,11 @@ var BadCases = []BadCase{
 `[{"op": "replace", "path": "/foo/bar", "value": null}, {"op": "add", "path": "/foo/bar/0", "value": "blah"}]`,
 false,
 },
+{
+`{}`,
+`[{"op": "replace", "path": ""}]`,
+true,
+},
 }
 
 // This is not thread safe, so we cannot run patch tests in parallel.