Isolated content of pkg/loader

pkg/loader/loader_test.go

@@ -0,0 +1,125 @@
+/*
+Copyright 2018 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 loader
+
+import (
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"k8s.io/kubectl/pkg/kustomize/util/fs"
+)
+
+func initializeRootLoader(fakefs fs.FileSystem) Loader {
+	var schemes []SchemeLoader
+	schemes = append(schemes, NewFileLoader(fakefs))
+	rootLoader := Init(schemes)
+	return rootLoader
+}
+
+func TestLoader_Root(t *testing.T) {
+
+	// Initialize the fake file system and the root loader.
+	fakefs := fs.MakeFakeFS()
+	fakefs.WriteFile("/home/seans/project/file.yaml", []byte("Unused"))
+	fakefs.WriteFile("/home/seans/project/subdir/file.yaml", []byte("Unused"))
+	fakefs.WriteFile("/home/seans/project2/file.yaml", []byte("Unused"))
+	rootLoader := initializeRootLoader(fakefs)
+
+	_, err := rootLoader.New("")
+	if err == nil {
+		t.Fatalf("Expected error for empty root location not returned")
+	}
+	_, err = rootLoader.New("https://google.com/project")
+	if err == nil {
+		t.Fatalf("Expected error for unknown scheme not returned")
+	}
+
+	// Test with trailing slash in directory.
+	loader, err := rootLoader.New("/home/seans/project/")
+	if err != nil {
+		t.Fatalf("Unexpected in New(): %v\n", err)
+	}
+	if "/home/seans/project/" != loader.Root() {
+		t.Fatalf("Incorrect Loader Root: %s\n", loader.Root())
+	}
+
+	subLoader, err := loader.New("subdir")
+	if err != nil {
+		t.Fatalf("Unexpected in New(): %v\n", err)
+	}
+	if "/home/seans/project/subdir" != subLoader.Root() {
+		t.Fatalf("Incorrect Loader Root: %s\n", subLoader.Root())
+	}
+
+	// Test without trailing slash in directory.
+	anotherLoader, err := loader.New("/home/seans/project2")
+	if err != nil {
+		t.Fatalf("Unexpected in New(): %v\n", err)
+	}
+	if "/home/seans/project2" != anotherLoader.Root() {
+		t.Fatalf("Incorrect Loader Root: %s\n", anotherLoader.Root())
+	}
+
+	// Current directory should be expanded to a full absolute file path.
+	currentDirLoader, err := loader.New(".")
+	if err != nil {
+		t.Fatalf("Unexpected in New(): %v\n", err)
+	}
+	if !filepath.IsAbs(currentDirLoader.Root()) {
+		t.Fatalf("Incorrect Loader Root: %s\n", currentDirLoader.Root())
+	}
+}
+
+func TestLoader_Load(t *testing.T) {
+
+	// Initialize the fake file system and the root loader.
+	fakefs := fs.MakeFakeFS()
+	fakefs.WriteFile("/home/seans/project/file.yaml", []byte("This is a yaml file"))
+	fakefs.WriteFile("/home/seans/project/subdir/file.yaml", []byte("Subdirectory file content"))
+	fakefs.WriteFile("/home/seans/project2/file.yaml", []byte("This is another yaml file"))
+	rootLoader := initializeRootLoader(fakefs)
+
+	loader, err := rootLoader.New("/home/seans/project")
+	if err != nil {
+		t.Fatalf("Unexpected in New(): %v\n", err)
+	}
+	fileBytes, err := loader.Load("file.yaml") // Load relative to root location
+	if err != nil {
+		t.Fatalf("Unexpected error in Load(): %v", err)
+	}
+	if !reflect.DeepEqual([]byte("This is a yaml file"), fileBytes) {
+		t.Fatalf("Load failed. Expected %s, but got %s", "This is a yaml file", fileBytes)
+	}
+
+	fileBytes, err = loader.Load("subdir/file.yaml")
+	if err != nil {
+		t.Fatalf("Unexpected error in Load(): %v", err)
+	}
+	if !reflect.DeepEqual([]byte("Subdirectory file content"), fileBytes) {
+		t.Fatalf("Load failed. Expected %s, but got %s", "Subdirectory file content", fileBytes)
+	}
+
+	fileBytes, err = loader.Load("/home/seans/project2/file.yaml")
+	if err != nil {
+		t.Fatalf("Unexpected error in Load(): %v", err)
+	}
+	if !reflect.DeepEqual([]byte("This is another yaml file"), fileBytes) {
+		t.Fatalf("Load failed. Expected %s, but got %s", "This is another yaml file", fileBytes)
+	}
+
+}