Add a broken test for multiple appliers

Author: jennybuckley

merge/multiple_appliers_test.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package merge_test
+
+import (
+	"testing"
+
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+	. "sigs.k8s.io/structured-merge-diff/internal/fixture"
+)
+
+func TestMultipleAppliersSetBroken(t *testing.T) {
+	tests := map[string]TestCase{
+		"remove_one_keep_one": {
+			Ops: []Operation{
+				Apply{
+					Manager:    "apply-one",
+					APIVersion: "v1",
+					Object: `
+						list:
+						- a
+						- b
+						- c
+					`,
+				},
+				Apply{
+					Manager:    "apply-two",
+					APIVersion: "v2",
+					Object: `
+						list:
+						- c
+						- d
+					`,
+				},
+				Apply{
+					Manager:    "apply-one",
+					APIVersion: "v3",
+					Object: `
+						list:
+						- a
+					`,
+				},
+			},
+			Object: `
+				list:
+				- a
+				- c
+				- d
+			`,
+			Managed: fieldpath.ManagedFields{
+				"apply-one": &fieldpath.VersionedSet{
+					Set: _NS(
+						_P("list", _SV("a")),
+					),
+					APIVersion: "v3",
+				},
+				"apply-two": &fieldpath.VersionedSet{
+					Set: _NS(
+						_P("list", _SV("c")),
+						_P("list", _SV("d")),
+					),
+					APIVersion: "v2",
+				},
+			},
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			if test.Test(setFieldsParser) == nil {
+				t.Fatal("Broken test passed")
+			}
+		})
+	}
+}