Adds kustomize edit add base command

This pull request adds support for editing the kustomization.yaml in the current directory with a base.

pkg/commands/addbase_test.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2017 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 commands
+
+import (
+	"testing"
+
+	"strings"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/constants"
+	"github.com/kubernetes-sigs/kustomize/pkg/fs"
+)
+
+const (
+	baseDirectoryPath = "my/path/to/wonderful/base"
+)
+
+func TestAddBaseHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.Mkdir(baseDirectoryPath, 0777)
+	fakeFS.WriteFile(constants.KustomizationFileName, []byte(kustomizationContent))
+
+	cmd := newCmdAddBase(fakeFS)
+	args := []string{baseDirectoryPath}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadFile(constants.KustomizationFileName)
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), baseDirectoryPath) {
+		t.Errorf("expected patch name in kustomization")
+	}
+}
+
+func TestAddBaseAlreadyThere(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	// Create fake directory
+	fakeFS.Mkdir(baseDirectoryPath, 0777)
+	fakeFS.WriteFile(constants.KustomizationFileName, []byte(kustomizationContent))
+
+	cmd := newCmdAddBase(fakeFS)
+	args := []string{baseDirectoryPath}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+	// adding an existing base should return an error
+	err = cmd.RunE(cmd, args)
+	if err == nil {
+		t.Errorf("expected already there problem")
+	}
+	if err.Error() != "base "+baseDirectoryPath+" already in kustomization file" {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
+func TestAddBaseNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdAddBase(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify a base directory" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}