test: add basic integration tests

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/containerd/continuity/driver/driver_windows.go

@@ -0,0 +1,42 @@
+//go:build go1.13
+// +build go1.13
+
+/*
+   Copyright The containerd 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.
+*/
+
+// Go 1.13 is the minimally supported version for Windows.
+// Earlier golang releases have bug in os.Readlink
+// (see https://github.com/golang/go/issues/30463).
+
+package driver
+
+import (
+	"os"
+)
+
+func (d *driver) Mknod(path string, mode os.FileMode, major, minor int) error {
+	return &os.PathError{Op: "mknod", Path: path, Err: ErrNotSupported}
+}
+
+func (d *driver) Mkfifo(path string, mode os.FileMode) error {
+	return &os.PathError{Op: "mkfifo", Path: path, Err: ErrNotSupported}
+}
+
+// Lchmod changes the mode of an file not following symlinks.
+func (d *driver) Lchmod(path string, mode os.FileMode) (err error) {
+	// TODO: Use Window's equivalent
+	return os.Chmod(path, mode)
+}