Move mock document file system to testutils

This commit makes mock filesystem reusable by moving it to importable
package in testutils

Change-Id: I4885480a9ef3b8c81da0058db708c32187af8e12
Relates-To: #277
Relates-To: #238
Closes: #277

pkg/k8s/kubectl/kubectl_test.go

@@ -26,6 +26,7 @@ import (
 	"opendev.org/airship/airshipctl/pkg/k8s/kubectl"
 	k8sutils "opendev.org/airship/airshipctl/pkg/k8s/utils"
 	"opendev.org/airship/airshipctl/testutil"
+	"opendev.org/airship/airshipctl/testutil/fs"
 	k8stest "opendev.org/airship/airshipctl/testutil/k8sutils"
 )
 
@@ -37,28 +38,6 @@ var (
 	ErrTempFileError = errors.New("ErrTempFileError")
 )
 
-type MockFileSystem struct {
-	MockRemoveAll func() error
-	MockTempFile  func() (document.File, error)
-	document.FileSystem
-}
-
-func (fsys MockFileSystem) RemoveAll(string) error { return fsys.MockRemoveAll() }
-func (fsys MockFileSystem) TempFile(string, string) (document.File, error) {
-	return fsys.MockTempFile()
-}
-
-type TestFile struct {
-	document.File
-	MockName  func() string
-	MockWrite func() (int, error)
-	MockClose func() error
-}
-
-func (f TestFile) Name() string              { return f.MockName() }
-func (f TestFile) Write([]byte) (int, error) { return f.MockWrite() }
-func (f TestFile) Close() error              { return f.MockClose() }
-
 func TestNewKubectlFromKubeConfigPath(t *testing.T) {
 	f := k8sutils.FactoryFromKubeConfigPath(kubeconfigPath)
 	kctl := kubectl.NewKubectl(f).WithBufferDir("/tmp/.airship")
@@ -98,10 +77,10 @@ func TestApply(t *testing.T) {
 	}{
 		{
 			expectedErr: nil,
-			fs: MockFileSystem{
+			fs: fs.MockFileSystem{
 				MockRemoveAll: func() error { return nil },
 				MockTempFile: func() (document.File, error) {
-					return TestFile{
+					return fs.TestFile{
 						MockName:  func() string { return filenameRC },
 						MockWrite: func() (int, error) { return 0, nil },
 						MockClose: func() error { return nil },
@@ -111,15 +90,15 @@ func TestApply(t *testing.T) {
 		},
 		{
 			expectedErr: ErrWriteOutError,
-			fs: MockFileSystem{
+			fs: fs.MockFileSystem{
 				MockTempFile: func() (document.File, error) { return nil, ErrWriteOutError }},
 		},
 		{
 			expectedErr: ErrTempFileError,
-			fs: MockFileSystem{
+			fs: fs.MockFileSystem{
 				MockRemoveAll: func() error { return nil },
 				MockTempFile: func() (document.File, error) {
-					return TestFile{
+					return fs.TestFile{
 						MockWrite: func() (int, error) { return 0, ErrTempFileError },
 						MockName:  func() string { return filenameRC },
 						MockClose: func() error { return nil },

testutil/fs/fs.go

@@ -0,0 +1,57 @@
+/*
+ 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
+
+     https://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 (
+	"opendev.org/airship/airshipctl/pkg/document"
+)
+
+// MockFileSystem implements Filesystem
+type MockFileSystem struct {
+	MockRemoveAll func() error
+	MockTempDir   func() (string, error)
+	MockTempFile  func() (document.File, error)
+	document.FileSystem
+}
+
+// RemoveAll Filesystem interface imlementation
+func (fsys MockFileSystem) RemoveAll(string) error { return fsys.MockRemoveAll() }
+
+// TempFile Filesystem interface imlementation
+func (fsys MockFileSystem) TempFile(string, string) (document.File, error) {
+	return fsys.MockTempFile()
+}
+
+// TempDir Filesystem interface imlementation
+func (fsys MockFileSystem) TempDir(string, string) (string, error) {
+	return fsys.MockTempDir()
+}
+
+// TestFile implements file
+type TestFile struct {
+	document.File
+	MockName  func() string
+	MockWrite func() (int, error)
+	MockClose func() error
+}
+
+// Name File interface imlementation
+func (f TestFile) Name() string { return f.MockName() }
+
+// Write File interface imlementation
+func (f TestFile) Write([]byte) (int, error) { return f.MockWrite() }
+
+// Close File interface imlementation
+func (f TestFile) Close() error { return f.MockClose() }