New backend for Citrix Sharefile - Fixes #1543

Many thanks to Bob Droog for organizing a test account and extensive
testing.

backend/sharefile/replace_test.go

@@ -0,0 +1,31 @@
+package sharefile
+
+import "testing"
+
+func TestReplace(t *testing.T) {
+	for _, test := range []struct {
+		in  string
+		out string
+	}{
+		{"", ""},
+		{"abc 123", "abc 123"},
+		{`\*<>?:|#%".~`, `＼＊＜＞？：｜#%＂.~`},
+		{`\*<>?:|#%".~/\*<>?:|#%".~`, `＼＊＜＞？：｜#%＂.~/＼＊＜＞？：｜#%＂.~`},
+		{" leading space", "␠leading space"},
+		{"trailing space ", "trailing space␠"},
+		{".leading dot", "．leading dot"},
+		{"trailing dot.", "trailing dot．"},
+		{" leading space/ leading space/ leading space", "␠leading space/␠leading space/␠leading space"},
+		{"trailing dot./trailing dot./trailing dot.", "trailing dot．/trailing dot．/trailing dot．"},
+		{".leading dot/..leading dot/.leading dot", "．leading dot/．.leading dot/．leading dot"},
+	} {
+		got := replaceReservedChars(test.in)
+		if got != test.out {
+			t.Errorf("replaceReservedChars(%q) want %q got %q", test.in, test.out, got)
+		}
+		got2 := restoreReservedChars(got)
+		if got2 != test.in {
+			t.Errorf("restoreReservedChars(%q) want %q got %q", got, test.in, got2)
+		}
+	}
+}