From 9e0837f2e9967b883bebf4b8928108d9199ae677 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Wed, 7 Oct 2020 11:15:01 -0700
Subject: syscall: restore EscapeArg behavior for empty string

Accidentally broken by CL 259978.

For #41825

Change-Id: Id663514e6eefa325faccdb66493d0bb2b3281046
Reviewed-on: https://go-review.googlesource.com/c/go/+/260397
Trust: Ian Lance Taylor <iant@golang.org>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---
 src/syscall/exec_windows_test.go | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/syscall/exec_windows_test.go

(limited to 'src/syscall/exec_windows_test.go')

diff --git a/src/syscall/exec_windows_test.go b/src/syscall/exec_windows_test.go
new file mode 100644
index 0000000000..eda1d36877
--- /dev/null
+++ b/src/syscall/exec_windows_test.go
@@ -0,0 +1,43 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package syscall_test
+
+import (
+	"syscall"
+	"testing"
+)
+
+func TestEscapeArg(t *testing.T) {
+	var tests = []struct {
+		input, output string
+	}{
+		{``, `""`},
+		{`a`, `a`},
+		{` `, `" "`},
+		{`\`, `\`},
+		{`"`, `\"`},
+		{`\"`, `\\\"`},
+		{`\\"`, `\\\\\"`},
+		{`\\ `, `"\\ "`},
+		{` \\`, `" \\\\"`},
+		{`a `, `"a "`},
+		{`C:\`, `C:\`},
+		{`C:\Program Files (x32)\Common\`, `"C:\Program Files (x32)\Common\\"`},
+		{`C:\Users\Игорь\`, `C:\Users\Игорь\`},
+		{`Андрей\file`, `Андрей\file`},
+		{`C:\Windows\temp`, `C:\Windows\temp`},
+		{`c:\temp\newfile`, `c:\temp\newfile`},
+		{`\\?\C:\Windows`, `\\?\C:\Windows`},
+		{`\\?\`, `\\?\`},
+		{`\\.\C:\Windows\`, `\\.\C:\Windows\`},
+		{`\\server\share\file`, `\\server\share\file`},
+		{`\\newserver\tempshare\really.txt`, `\\newserver\tempshare\really.txt`},
+	}
+	for _, test := range tests {
+		if got := syscall.EscapeArg(test.input); got != test.output {
+			t.Errorf("EscapeArg(%#q) = %#q, want %#q", test.input, got, test.output)
+		}
+	}
+}
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