testing.txt

# Initial state check
pwd                     # Should show ~
ls                      # Should show empty or initial directory state

# Test mkdir
mkdir test_dir
mkdir documents
ls                      # Should show test_dir and documents
mkdir test_dir         # Should fail - directory exists

# Test cd and pwd
cd test_dir
pwd                     # Should show ~/test_dir
cd ..
pwd                     # Should show ~
cd documents
pwd                     # Should show ~/documents
cd /                    # Test absolute path
pwd                     # Should show /
cd ~                    # Test home directory shortcut
pwd                     # Should show ~
cd nonexistent         # Should fail - no such directory

# Test touch and ls
touch file1.txt
touch file2.txt
touch file3.md
ls                      # Should show file1.txt, file2.txt, file3.md
touch file1.txt         # Should update timestamp, not fail

# Test echo and cat
echo "Hello World" > file1.txt
cat file1.txt           # Should show: Hello World
echo "Line 1" > file2.txt
echo " - Line 2" >> file2.txt
echo " - Line 3" >> file2.txt
cat file2.txt           # Should show: Line 1 - Line 2 - Line 3
cat nonexistent.txt    # Should fail - no such file

# Test mv
mv file1.txt renamed.txt
ls                      # Should show renamed.txt instead of file1.txt
cat renamed.txt         # Should still show: Hello World
mv file2.txt file3.md  # Should fail - destination exists
mv nonexistent.txt something.txt  # Should fail - source doesn't exist

# Test rm
rm file3.md
ls                      # Should not show file3.md
mkdir temp_dir
touch temp_dir/temp.txt
rm temp_dir            # Should fail - directory not empty
rm -r temp_dir         # Should succeed
ls                      # Should not show temp_dir
rm renamed.txt file2.txt  # Test multiple file removal
ls                      # Should show empty directory

# Test help
help                    # Should list all available commands with descriptions

# Test clear
clear                   # Should clear the terminal

# Final state verification
pwd                     # Should show current directory
ls                      # Should show current directory contents

# Test error cases for each command
cd ""                   # Should fail - no directory specified
mkdir ""                # Should fail - no directory name specified
touch ""                # Should fail - no filename specified
rm ""                   # Should fail - no file specified
cat ""                  # Should fail - no file specified
echo "" > ""           # Should fail - no filename specified
mv "" ""               # Should fail - no source/destination specified

# Test path navigation
cd /
pwd                     # Should show /
cd ~
pwd                     # Should show ~
mkdir a
cd a
mkdir b
cd b
pwd                     # Should show ~/a/b
cd ../..
pwd                     # Should show ~

# Test complex combinations
mkdir test
cd test
echo "test content" > test.txt
cat test.txt           # Should show: test content
cd ..
rm -r test            # Should remove directory and contents
ls                     # Should not show test directory