Add Delete function to patch pkg

pkg/patch/strategicmerge_test.go

@@ -0,0 +1,95 @@
+/*
+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 patch
+
+import (
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"testing"
+)
+
+func buildPatchStrategicMergeSlice(patchStrings []string) []types.PatchStrategicMerge {
+	var patches []types.PatchStrategicMerge
+	for _, patchString := range patchStrings {
+		patches = append(patches, types.PatchStrategicMerge(patchString))
+	}
+	return patches
+}
+
+func TestAppend(t *testing.T) {
+	patchStrings := []string{"patch1.yaml", "patch2.yaml"}
+	patches := buildPatchStrategicMergeSlice(patchStrings)
+
+	patches = Append(patches, "patch3.yaml")
+
+	for i, k := range []string{"patch1.yaml", "patch2.yaml", "patch3.yaml"} {
+		if patches[i] != types.PatchStrategicMerge(k) {
+			t.Fatalf("patches[%d] must be %s, got %s", i, k, patches[i])
+		}
+	}
+}
+
+func TestExistTrue(t *testing.T) {
+	patchStrings := []string{"patch1.yaml", "patch2.yaml"}
+	patches := buildPatchStrategicMergeSlice(patchStrings)
+
+	for _, patchString := range patchStrings {
+		if !Exist(patches, patchString) {
+			t.Fatalf("%s must exist", patchString)
+		}
+	}
+}
+
+func TestExistFalse(t *testing.T) {
+	patchStrings := []string{"patch1.yaml", "patch2.yaml"}
+	patches := buildPatchStrategicMergeSlice(patchStrings)
+
+	for _, patchString := range []string{"invalid1.yaml", "invalid2.yaml"} {
+		if Exist(patches, patchString) {
+			t.Fatalf("%s must not exist", patchString)
+		}
+	}
+}
+
+func TestDelete(t *testing.T) {
+	patchStrings := []string{"patch1.yaml", "patch2.yaml"}
+	patches := buildPatchStrategicMergeSlice(patchStrings)
+
+	patches = Delete(patches, "patch1.yaml")
+
+	if Exist(patches, "patch1.yaml") {
+		t.Fatalf("patch1.yaml should be deleted")
+	}
+	if !Exist(patches, "patch2.yaml") {
+		t.Fatalf("patch2.yaml should exist")
+	}
+	if len(patches) != 1 {
+		t.Fatalf("Length of slice must be 1: actual %d", len(patches))
+	}
+}
+
+func TestDeleteMultiple(t *testing.T) {
+	patchStrings := []string{"patch1.yaml", "patch2.yaml"}
+	patches := buildPatchStrategicMergeSlice(patchStrings)
+
+	patches = Delete(patches, "patch2.yaml", "patch4.yaml", "patch1.yaml", "patch3.yaml")
+
+	for _, k := range patchStrings {
+		if Exist(patches, k) {
+			t.Fatalf("%s should be deleted", k)
+		}
+	}
+}