1 files changed, 31 insertions, 0 deletions
diff --git a/library/std/src/sys/windows/process/tests.rs b/library/std/src/sys/windows/process/tests.rs
new file mode 100644
index 00000000000..81627ad139b
--- /dev/null
+++ b/library/std/src/sys/windows/process/tests.rs
@@ -0,0 +1,31 @@
+use super::make_command_line;
+use crate::ffi::{OsStr, OsString};
+
+#[test]
+fn test_make_command_line() {
+    fn test_wrapper(prog: &str, args: &[&str]) -> String {
+        let command_line = &make_command_line(
+            OsStr::new(prog),
+            &args.iter().map(|a| OsString::from(a)).collect::<Vec<OsString>>(),
+        )
+        .unwrap();
+        String::from_utf16(command_line).unwrap()
+    }
+
+    assert_eq!(test_wrapper("prog", &["aaa", "bbb", "ccc"]), "\"prog\" aaa bbb ccc");
+
+    assert_eq!(
+        test_wrapper("C:\\Program Files\\blah\\blah.exe", &["aaa"]),
+        "\"C:\\Program Files\\blah\\blah.exe\" aaa"
+    );
+    assert_eq!(
+        test_wrapper("C:\\Program Files\\test", &["aa\"bb"]),
+        "\"C:\\Program Files\\test\" aa\\\"bb"
+    );
+    assert_eq!(test_wrapper("echo", &["a b c"]), "\"echo\" \"a b c\"");
+    assert_eq!(test_wrapper("echo", &["\" \\\" \\", "\\"]), "\"echo\" \"\\\" \\\\\\\" \\\\\" \\");
+    assert_eq!(
+        test_wrapper("\u{03c0}\u{042f}\u{97f3}\u{00e6}\u{221e}", &[]),
+        "\"\u{03c0}\u{042f}\u{97f3}\u{00e6}\u{221e}\""
+    );
+}