test: migrate some tests from zms_testeur

test.sh

@@ -732,4 +732,19 @@ minishell: ?/home/khais: No such file or directory
 127
 EOF
 
+when_run <<"EOF" "export with no arguments"
+export
+export $DONTEXIT
+export $NOSUCHVAR $DONTEXIST
+EOF
+expecting <<EOF
+EOF
+
+when_run <<EOF "env with grep"
+env | grep HOME
+EOF
+expecting <<EOF
+$(env | grep HOME)
+EOF
+
 finalize