mock fs and file for testing

pkg/kinflate/util/fs/fake/file.go

@@ -0,0 +1,53 @@
+/*
+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 fs
+
+import (
+	"os"
+
+	"k8s.io/kubectl/pkg/kinflate/util/fs"
+)
+
+var _ fs.File = &FakeFile{}
+
+// FakeFile implements FileSystem using a fake in-memory filesystem.
+type FakeFile struct {
+	content []byte
+	open    bool
+}
+
+// Close closes a file.
+func (f *FakeFile) Close() error {
+	f.open = false
+	return nil
+}
+
+// Read reads a file's content.
+func (f *FakeFile) Read(p []byte) (n int, err error) {
+	return len(p), nil
+}
+
+// Write writes bytes to a file
+func (f *FakeFile) Write(p []byte) (n int, err error) {
+	f.content = p
+	return len(p), nil
+}
+
+// Stat returns an interface which has all the information regarding the file.
+func (f *FakeFile) Stat() (os.FileInfo, error) {
+	return nil, nil
+}

pkg/kinflate/util/fs/fake/fs.go

@@ -0,0 +1,49 @@
+/*
+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 fs
+
+import (
+	"os"
+
+	"k8s.io/kubectl/pkg/kinflate/util/fs"
+)
+
+var _ fs.FileSystem = &FakeFS{}
+
+// FakeFS implements FileSystem using a fake in-memory filesystem.
+type FakeFS struct{ m map[string]*FakeFile }
+
+// Create creates a file given the filename.
+func (fs *FakeFS) Create(name string) (fs.File, error) {
+	if fs.m == nil {
+		fs.m = map[string]*FakeFile{}
+	}
+	fs.m[name] = &FakeFile{}
+	return fs.m[name], nil
+}
+
+// Open opens a file given the filename.
+func (fs *FakeFS) Open(name string) (fs.File, error) {
+	if fs.m == nil {
+		fs.m = map[string]*FakeFile{}
+	}
+	fs.m[name] = &FakeFile{open: true}
+	return fs.m[name], nil
+}
+
+// Stat return an interface which has all the information regarding the file.
+func (fs *FakeFS) Stat(name string) (os.FileInfo, error) { return os.Stat(name) }

pkg/kinflate/util/fs/file.go

@@ -0,0 +1,38 @@
+/*
+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 fs
+
+import (
+	"os"
+)
+
+var _ File = &OSFile{}
+
+// OSFile implements File using the local filesystem.
+type OSFile struct{ file *os.File }
+
+// Close closes a file.
+func (f *OSFile) Close() error { return f.file.Close() }
+
+// Read reads a file's content.
+func (f *OSFile) Read(p []byte) (n int, err error) { return f.file.Read(p) }
+
+// Write writes bytes to a file
+func (f *OSFile) Write(p []byte) (n int, err error) { return f.file.Write(p) }
+
+// Stat returns an interface which has all the information regarding the file.
+func (f *OSFile) Stat() (os.FileInfo, error) { return f.file.Stat() }

pkg/kinflate/util/fs/fs.go

@@ -0,0 +1,35 @@
+/*
+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 fs
+
+import (
+	"os"
+)
+
+var _ FileSystem = OSFS{}
+
+// OSFS implements FileSystem using the local filesystem.
+type OSFS struct{}
+
+// Create creates a file given the filename.
+func (OSFS) Create(name string) (File, error) { return os.Create(name) }
+
+// Open opens a file given the filename.
+func (OSFS) Open(name string) (File, error) { return os.Open(name) }
+
+// Stat return an interface which has all the information regarding the file.
+func (OSFS) Stat(name string) (os.FileInfo, error) { return os.Stat(name) }

pkg/kinflate/util/fs/interface.go

@@ -0,0 +1,35 @@
+/*
+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 fs
+
+import (
+	"io"
+	"os"
+)
+
+// FileSystem is the interface that groups the basic filesystem methods.
+type FileSystem interface {
+	Create(name string) (File, error)
+	Open(name string) (File, error)
+	Stat(name string) (os.FileInfo, error)
+}
+
+// File is the interface that groups the basic file methods.
+type File interface {
+	io.ReadWriteCloser
+	Stat() (os.FileInfo, error)
+}