improve testing script

testing_script.t

@@ -0,0 +1,55 @@
+use disk1
+mkfs 32
+
+mkdir test1
+mkdir test2
+la
+
+cd test1
+la
+
+create hello1
+mkdir inside
+symlink ../../test2/ inside/hello3
+stat inside/hello3
+
+cd ../test2
+la
+
+symlink ../test1/inside hello2
+stat hello2
+
+cd /
+cd test1/../test2/hello2/../../test2/.././././test1/inside/hello3/./hello2/.
+
+cd ..
+create inside/././hello3/.././test1/f7
+symlink /test1/f7 ../f1
+la
+cd ..
+la
+cd test1
+open ../test2/hello2/../../f1
+write 0 data
+la
+close 0
+
+cd /
+rm test1
+rmdir test1
+rm test1/inside/hello3
+rmdir test1/inside
+rm test1/hello1
+rm test1/f7
+rmdir test1
+
+cd test2
+la
+cd hello2
+
+symlink garbage/ttttt ..
+cd ..
+la
+
+cd ttttt
+rm ttttt