cmd/tests: Test calling batch files named as builtin commands.

programs/cmd/tests/test_builtins.cmd

@@ -2711,7 +2711,13 @@ echo>robinfile
 if 1==1 call del batfile
 dir /b
 if exist batfile echo batfile shouldn't exist
+rem arcane command, first resets errorlevel, second sets it to one
+(call )
+echo %ErrorLevel%
+(call)
+echo %ErrorLevel%
 rem ... but not for 'if' or 'for'
+call :setError 0
 call if 1==1 echo bar 2> nul
 echo %ErrorLevel%
 call :setError 0
@@ -2738,6 +2744,20 @@ call if 1==1 (
 call call call echo passed
 cd .. & rd /s/q foobar
 
+echo --- mixing batch and builtins
+erase /q echo.bat test.bat 2> NUL
+echo @echo foo> echo.bat
+echo @echo bar> test.bat & call test.bat
+echo @echo.bat bar> test.bat & call test.bat
+echo @call echo bar> test.bat & call test.bat
+echo @call echo.bat bar> test.bat & call test.bat
+erase /q echo.bat 2> NUL
+echo @echo bar> test.bat & call test.bat
+echo @echo.bat bar> test.bat & call test.bat
+echo @call echo bar> test.bat & call test.bat
+echo @call echo.bat bar> test.bat & call test.bat
+erase /q test.bat 2> NUL
+
 echo ------------ Testing SHIFT ------------
 
 call :shiftFun p1 p2 p3 p4 p5

programs/cmd/tests/test_builtins.cmd.exp

@@ -1537,6 +1537,8 @@ foo created
 Should expand foobaz
 batfile
 robinfile
+0
+@todo_wine@1
 1
 1
 non-builtin dir
@@ -1545,6 +1547,15 @@ Line two
 Get if
 ... and else!
 passed
+--- mixing batch and builtins
+bar@space@
+@todo_wine@foo
+foo
+foo
+bar@space@
+bat bar@space@
+bar@space@
+bat bar@space@
 ------------ Testing SHIFT ------------
 'p1' 'p2' 'p3' 'p4' 'p5'
 'p2' 'p3' 'p4' 'p5' ''