cmd/tests: Add tests for PATH separator.

programs/cmd/tests/test_builtins.cmd

@@ -3294,6 +3294,29 @@ path try2
 path
 path=try3
 path
+
+echo ------------ Testing PATH Evaluate ------------
+mkdir folder
+echo echo I'm here! > folder\sub1.bat
+
+echo Test normal PATH usage
+set path=%cd%\folder
+call sub1.bat
+
+echo Test PATH usage with leading semicolon
+set path=;%cd%\folder
+call sub1.bat
+
+echo Test PATH usage with fallback path
+set path=%cd%;%cd%\folder
+call sub1.bat
+
+echo Test PATH usage with double semicolon
+set path=%cd%;;%cd%\folder
+call sub1.bat
+
+del folder\sub1.bat
+rmdir folder
 set path=%WINE_backup_path%
 set WINE_backup_path=
 

programs/cmd/tests/test_builtins.cmd.exp

@@ -1680,6 +1680,15 @@ Finished
 PATH=original
 PATH=try2
 PATH=try3
+------------ Testing PATH Evaluate ------------
+Test normal PATH usage
+I'm here!@space@
+Test PATH usage with leading semicolon
+I'm here!@space@
+Test PATH usage with fallback path
+I'm here!@space@
+Test PATH usage with double semicolon
+I'm here!@space@
 ------------ Testing start /W ------------
 start /W seems to really wait
 ------------ Testing changing the drive letter ----------