resolution tests cd_bindir, cd_home, et b_env sauf une vraie erreur

tests/false_positive.sh

@@ -10,6 +10,191 @@ cat Makefile | grep pr | head -n 5 | hello (NA)
 echo $?
 
 
+#---------------------------------------------
+# export PWD et OLDPWD ne dependent pas des meme action que bash
+# (dans bash : cd ne creer pas PWD, et OLDPWD n'existe que si PWD existe)
+
+unset PWD
+cd ..
+env | grep PWD
+
+unset OLDPWD
+cd ..
+env | grep OLDPWD
+
+unset PWD
+cd ..
+export PWD=new_value
+env | grep PWD
+
+
+unset PWD
+cd ..
+export PWD
+env | grep PWD
+
+
+#---------------------------------------------
+# export ne reconnait pas +=
+
+export APPEND=1
+export APPEND+=2
+env | grep APPEND
+
+
+#---------------------------------------------
+# export seul n'affiche pas les variables d'env
+
+export | grep -v -E '^declare -x _='
+env
+
+export 1 _+ _OK _2? _OK2=VAR =NG OK3=
+export | grep -v -E '^declare -x _='
+env
+
+export dquote='"' dollar='$' backslash='\' backquote='`' newline='\n'
+export | grep -v -E '^declare -x _='
+env
+
+export APPEND=1
+export APPEND+=2
+export | grep APPEND
+env
+
+export APPEND_NONE=1
+export APPEND_NONE+=
+export | grep APPEND_NONE
+env
+
+export APPEND_NONE=
+export APPEND_NONE=
+export APPEND_NONE+=
+export | grep APPEND_NONE
+env
+
+export APPEND_EMPTY=""
+export APPEND_EMPTY=""
+export APPEND_EMPTY=""
+export | grep APPEND_EMPTY
+env
+
+export OVERWRITE=42
+export OVERWRITE=a
+export | grep OVERWRITE
+env
+
+export A=B=C=D
+export | grep A
+env
+
+export PATH
+export | grep PATH
+env
+
+export PWD
+export | grep PWD
+env
+
+export OLDPWD
+export | grep OLDPWD
+env
+
+unset PWD
+cd ..
+export | grep PWD
+env
+
+unset OLDPWD
+cd ..
+export | grep OLDPWD
+env
+
+unset PWD
+cd ..
+export PWD=new_value
+export | grep PWD
+env
+
+unset OLDPWD
+cd ..
+export OLDPWD=new_value
+export | grep OLDPWD
+env
+
+unset PWD
+cd ..
+export PWD
+export | grep PWD
+env
+
+unset OLDPWD
+cd ..
+export OLDPWD
+export | grep OLDPWD
+env
+
+#---------------------------------------------
+# cd /bin redirects to /usr/bin
+
+cd /bin
+pwd
+
+cd /bin/../
+pwd
+
+cd /
+pwd
+cd /bin
+pwd
+
+cd /
+pwd
+cd //bin
+pwd
+
+cd //
+pwd
+cd //bin
+pwd
+
+cd ///
+pwd
+cd ///bin
+pwd
+
+cd ////
+pwd
+cd ////bin
+pwd
+
+cd /////
+pwd
+cd /////bin
+pwd
+
+cd //////
+pwd
+cd //////bin
+pwd
+
+cd ///////
+pwd
+cd ///////bin
+pwd
+
+
+#---------------------------------------------
+# https://stackoverflow.com/questions/20690828/what-does-double-slash-in-cd-mean-in-linux
+# pathname with two slashes
+
+export HOME=//
+cd
+pwd
+
+export HOME=//bin/..////////////bin/../
+cd
+pwd
+
 #---------------------------------------------
 # Race condition, unpredictable behaviour