# Root directory has only tool dir in it.
expect tool
dir /

# Create a file.
write /test contents

# Directory shows it.
expect test
expect tool
dir /

# Make a new directory, check it's there
mkdir /dir
expect dir
expect test
expect tool
dir /

# Check it's empty.
dir /dir

# Create a file, check it exists.
write /dir/test2 contents2
expect test2
dir /dir
expect contents2
read /dir/test2

# Creating dir over the top should succeed.
mkdir /dir
mkdir /dir/test2

# Mkdir implicitly creates directories.
mkdir /dir/1/2/3/4
expect test2
expect 1
dir /dir
expect 2
dir /dir/1
expect 3
dir /dir/1/2
expect 4
dir /dir/1/2/3
dir /dir/1/2/3/4