cmd/tests: Add basic cd tests.

programs/cmd/tests/test_builtins.cmd

@@ -244,6 +244,38 @@ if exist bar6 (
     del bar6
 )
 
+echo ------------ Testing cd ------------
+mkdir foobar
+cd foobar
+echo blabla > singleFile
+dir /b
+echo Current dir: %CD%
+cd
+cd ..
+cd
+cd foobar@space@
+cd
+cd ..
+cd
+cd @space@foobar
+cd
+cd..
+cd
+cd foobar
+cd..@space@
+cd
+if not exist foobar (cd ..)
+cd foobar
+mkdir "bar bak"
+cd "bar bak"
+cd
+cd ..
+cd bar bak
+cd
+cd ..\..
+cd
+rd /Q/s foobar
+
 echo ------------ Testing type ------------
 echo bar> foobaz
 @echo on

programs/cmd/tests/test_builtins.cmd.exp

@@ -179,6 +179,19 @@ foo4
 @todo_wine@...on failure conditional ||
 @todo_wine@foo5
 @todo_wine@foo6@space@
+------------ Testing cd ------------
+singleFile
+Current dir: @pwd@\foobar@or_broken@Current dir:@space@
+@pwd@\foobar
+@pwd@
+@pwd@\foobar
+@pwd@
+@pwd@\foobar
+@pwd@
+@todo_wine@@pwd@
+@pwd@\foobar\bar bak
+@pwd@\foobar\bar bak
+@pwd@
 ------------ Testing type ------------
 
 @pwd@>type foobaz@space@