lib/protocol: Apply input filtering on file names

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3775

lib/protocol/nativemodel_windows_test.go

@@ -0,0 +1,29 @@
+// Copyright (C) 2016 The Protocol Authors.
+
+package protocol
+
+import "testing"
+import "reflect"
+
+func TestFixupFiles(t *testing.T) {
+	files := []FileInfo{
+		{Name: "foo/bar"},
+		{Name: `foo\bar`},
+		{Name: "foo/baz"},
+		{Name: "foo/quux"},
+		{Name: `foo\fail`},
+	}
+
+	// Filenames should be slash converted, except files which already have
+	// backslashes in them which are instead filtered out.
+	expected := []FileInfo{
+		{Name: `foo\bar`},
+		{Name: `foo\baz`},
+		{Name: `foo\quux`},
+	}
+
+	fixed := fixupFiles(files)
+	if !reflect.DeepEqual(fixed, expected) {
+		t.Errorf("Got %v, expected %v", fixed, expected)
+	}
+}